#include "postgres.h"
#include "access/amapi.h"
#include "access/htup_details.h"
#include "access/relation.h"
#include "access/reloptions.h"
#include "access/table.h"
#include "access/toast_compression.h"
#include "catalog/dependency.h"
#include "catalog/heap.h"
#include "catalog/index.h"
#include "catalog/namespace.h"
#include "catalog/pg_am.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_statistic_ext.h"
#include "catalog/pg_type.h"
#include "commands/comment.h"
#include "commands/defrem.h"
#include "commands/sequence.h"
#include "commands/tablecmds.h"
#include "commands/tablespace.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/optimizer.h"
#include "parser/analyze.h"
#include "parser/parse_clause.h"
#include "parser/parse_coerce.h"
#include "parser/parse_collate.h"
#include "parser/parse_expr.h"
#include "parser/parse_relation.h"
#include "parser/parse_target.h"
#include "parser/parse_type.h"
#include "parser/parse_utilcmd.h"
#include "parser/parser.h"
#include "rewrite/rewriteManip.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/partcache.h"
#include "utils/rel.h"
#include "utils/ruleutils.h"
#include "utils/syscache.h"
#include "utils/typcache.h"

Include dependency graph for parse_utilcmd.c:

Data Structures
struct	CreateStmtContext

struct	CreateSchemaStmtContext

Macros
#define	SUPPORTS_ATTRS(node)

Functions
static void	transformColumnDefinition (CreateStmtContext cxt, ColumnDef column)

static void	transformTableConstraint (CreateStmtContext cxt, Constraint constraint)

static void	transformTableLikeClause (CreateStmtContext cxt, TableLikeClause table_like_clause)

static void	transformOfType (CreateStmtContext cxt, TypeName ofTypename)

static CreateStatsStmt *	generateClonedExtStatsStmt (RangeVar heapRel, Oid heapRelid, Oid source_statsid, const AttrMap attmap)

static List *	get_collation (Oid collation, Oid actual_datatype)

static List *	get_opclass (Oid opclass, Oid actual_datatype)

static void	transformIndexConstraints (CreateStmtContext *cxt)

static IndexStmt *	transformIndexConstraint (Constraint constraint, CreateStmtContext cxt)

static void	transformFKConstraints (CreateStmtContext *cxt, bool skipValidation, bool isAddConstraint)

static void	transformCheckConstraints (CreateStmtContext *cxt, bool skipValidation)

static void	transformConstraintAttrs (CreateStmtContext cxt, List constraintList)

static void	transformColumnType (CreateStmtContext cxt, ColumnDef column)

static void	setSchemaName (const char context_schema, char *stmt_schema_name)

static void	transformPartitionCmd (CreateStmtContext cxt, PartitionCmd cmd)

static List *	transformPartitionRangeBounds (ParseState pstate, List blist, Relation parent)

static void	validateInfiniteBounds (ParseState pstate, List blist)

static Const *	transformPartitionBoundValue (ParseState pstate, Node val, const char *colName, Oid colType, int32 colTypmod, Oid partCollation)

List *	transformCreateStmt (CreateStmt stmt, const char queryString)

static void	generateSerialExtraStmts (CreateStmtContext cxt, ColumnDef column, Oid seqtypid, List seqoptions, bool for_identity, bool col_exists, char snamespace_p, char *sname_p)

List *	expandTableLikeClause (RangeVar heapRel, TableLikeClause table_like_clause)

IndexStmt *	generateClonedIndexStmt (RangeVar heapRel, Relation source_idx, const AttrMap attmap, Oid *constraintOid)

IndexStmt *	transformIndexStmt (Oid relid, IndexStmt stmt, const char queryString)

CreateStatsStmt *	transformStatsStmt (Oid relid, CreateStatsStmt stmt, const char queryString)

void	transformRuleStmt (RuleStmt stmt, const char queryString, List actions, Node whereClause)

AlterTableStmt *	transformAlterTableStmt (Oid relid, AlterTableStmt stmt, const char queryString, List beforeStmts, List afterStmts)

List *	transformCreateSchemaStmtElements (List schemaElts, const char schemaName)

PartitionBoundSpec *	transformPartitionBound (ParseState pstate, Relation parent, PartitionBoundSpec spec)

Macro Definition Documentation

◆ SUPPORTS_ATTRS

#define SUPPORTS_ATTRS ( node )

Value:

    ((node) != NULL &&                      \
     ((node)->contype == CONSTR_PRIMARY ||  \
      (node)->contype == CONSTR_UNIQUE ||   \
      (node)->contype == CONSTR_EXCLUSION || \
      (node)->contype == CONSTR_FOREIGN))

Function Documentation

◆ expandTableLikeClause()

List * expandTableLikeClause	(	RangeVar *	heapRel,
		TableLikeClause *	table_like_clause
	)

Definition at line 1322 of file parse_utilcmd.c.

{
    List       *result = NIL;
    List       *atsubcmds = NIL;
    AttrNumber  parent_attno;
    Relation    relation;
    Relation    childrel;
    TupleDesc   tupleDesc;
    TupleConstr *constr;
    AttrMap    *attmap;
    char       *comment;
 
    /*
     * Open the relation referenced by the LIKE clause.  We should still have
     * the table lock obtained by transformTableLikeClause (and this'll throw
     * an assertion failure if not).  Hence, no need to recheck privileges
     * etc.  We must open the rel by OID not name, to be sure we get the same
     * table.
     */
    if (!OidIsValid(table_like_clause->relationOid))
        elog(ERROR, "expandTableLikeClause called on untransformed LIKE clause");
 
    relation = relation_open(table_like_clause->relationOid, NoLock);
 
    tupleDesc = RelationGetDescr(relation);
    constr = tupleDesc->constr;
 
    /*
     * Open the newly-created child relation; we have lock on that too.
     */
    childrel = relation_openrv(heapRel, NoLock);
 
    /*
     * Construct a map from the LIKE relation's attnos to the child rel's.
     * This re-checks type match etc, although it shouldn't be possible to
     * have a failure since both tables are locked.
     */
    attmap = build_attrmap_by_name(RelationGetDescr(childrel),
                                   tupleDesc,
                                   false);
 
    /*
     * Process defaults, if required.
     */
    if ((table_like_clause->options &
         (CREATE_TABLE_LIKE_DEFAULTS | CREATE_TABLE_LIKE_GENERATED)) &&
        constr != NULL)
    {
        for (parent_attno = 1; parent_attno <= tupleDesc->natts;
             parent_attno++)
        {
            Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
                                                        parent_attno - 1);
 
            /*
             * Ignore dropped columns in the parent.
             */
            if (attribute->attisdropped)
                continue;
 
            /*
             * Copy default, if present and it should be copied.  We have
             * separate options for plain default expressions and GENERATED
             * defaults.
             */
            if (attribute->atthasdef &&
                (attribute->attgenerated ?
                 (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED) :
                 (table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS)))
            {
                Node       *this_default;
                AlterTableCmd *atsubcmd;
                bool        found_whole_row;
 
                this_default = TupleDescGetDefault(tupleDesc, parent_attno);
                if (this_default == NULL)
                    elog(ERROR, "default expression not found for attribute %d of relation \"%s\"",
                         parent_attno, RelationGetRelationName(relation));
 
                atsubcmd = makeNode(AlterTableCmd);
                atsubcmd->subtype = AT_CookedColumnDefault;
                atsubcmd->num = attmap->attnums[parent_attno - 1];
                atsubcmd->def = map_variable_attnos(this_default,
                                                    1, 0,
                                                    attmap,
                                                    InvalidOid,
                                                    &found_whole_row);
 
                /*
                 * Prevent this for the same reason as for constraints below.
                 * Note that defaults cannot contain any vars, so it's OK that
                 * the error message refers to generated columns.
                 */
                if (found_whole_row)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("cannot convert whole-row table reference"),
                             errdetail("Generation expression for column \"%s\" contains a whole-row reference to table \"%s\".",
                                       NameStr(attribute->attname),
                                       RelationGetRelationName(relation))));
 
                atsubcmds = lappend(atsubcmds, atsubcmd);
            }
        }
    }
 
    /*
     * Copy CHECK constraints if requested, being careful to adjust attribute
     * numbers so they match the child.
     */
    if ((table_like_clause->options & CREATE_TABLE_LIKE_CONSTRAINTS) &&
        constr != NULL)
    {
        int         ccnum;
 
        for (ccnum = 0; ccnum < constr->num_check; ccnum++)
        {
            char       *ccname = constr->check[ccnum].ccname;
            char       *ccbin = constr->check[ccnum].ccbin;
            bool        ccenforced = constr->check[ccnum].ccenforced;
            bool        ccvalid = constr->check[ccnum].ccvalid;
            bool        ccnoinherit = constr->check[ccnum].ccnoinherit;
            Node       *ccbin_node;
            bool        found_whole_row;
            Constraint *n;
            AlterTableCmd *atsubcmd;
 
            ccbin_node = map_variable_attnos(stringToNode(ccbin),
                                             1, 0,
                                             attmap,
                                             InvalidOid, &found_whole_row);
 
            /*
             * We reject whole-row variables because the whole point of LIKE
             * is that the new table's rowtype might later diverge from the
             * parent's.  So, while translation might be possible right now,
             * it wouldn't be possible to guarantee it would work in future.
             */
            if (found_whole_row)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("cannot convert whole-row table reference"),
                         errdetail("Constraint \"%s\" contains a whole-row reference to table \"%s\".",
                                   ccname,
                                   RelationGetRelationName(relation))));
 
            n = makeNode(Constraint);
            n->contype = CONSTR_CHECK;
            n->conname = pstrdup(ccname);
            n->location = -1;
            n->is_enforced = ccenforced;
            n->initially_valid = ccvalid;
            n->is_no_inherit = ccnoinherit;
            n->raw_expr = NULL;
            n->cooked_expr = nodeToString(ccbin_node);
 
            /* We can skip validation, since the new table should be empty. */
            n->skip_validation = true;
 
            atsubcmd = makeNode(AlterTableCmd);
            atsubcmd->subtype = AT_AddConstraint;
            atsubcmd->def = (Node *) n;
            atsubcmds = lappend(atsubcmds, atsubcmd);
 
            /* Copy comment on constraint */
            if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
                (comment = GetComment(get_relation_constraint_oid(RelationGetRelid(relation),
                                                                  n->conname, false),
                                      ConstraintRelationId,
                                      0)) != NULL)
            {
                CommentStmt *stmt = makeNode(CommentStmt);
 
                stmt->objtype = OBJECT_TABCONSTRAINT;
                stmt->object = (Node *) list_make3(makeString(heapRel->schemaname),
                                                   makeString(heapRel->relname),
                                                   makeString(n->conname));
                stmt->comment = comment;
 
                result = lappend(result, stmt);
            }
        }
    }
 
    /*
     * If we generated any ALTER TABLE actions above, wrap them into a single
     * ALTER TABLE command.  Stick it at the front of the result, so it runs
     * before any CommentStmts we made above.
     */
    if (atsubcmds)
    {
        AlterTableStmt *atcmd = makeNode(AlterTableStmt);
 
        atcmd->relation = copyObject(heapRel);
        atcmd->cmds = atsubcmds;
        atcmd->objtype = OBJECT_TABLE;
        atcmd->missing_ok = false;
        result = lcons(atcmd, result);
    }
 
    /*
     * Process indexes if required.
     */
    if ((table_like_clause->options & CREATE_TABLE_LIKE_INDEXES) &&
        relation->rd_rel->relhasindex &&
        childrel->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
    {
        List       *parent_indexes;
        ListCell   *l;
 
        parent_indexes = RelationGetIndexList(relation);
 
        foreach(l, parent_indexes)
        {
            Oid         parent_index_oid = lfirst_oid(l);
            Relation    parent_index;
            IndexStmt  *index_stmt;
 
            parent_index = index_open(parent_index_oid, AccessShareLock);
 
            /* Build CREATE INDEX statement to recreate the parent_index */
            index_stmt = generateClonedIndexStmt(heapRel,
                                                 parent_index,
                                                 attmap,
                                                 NULL);
 
            /* Copy comment on index, if requested */
            if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
            {
                comment = GetComment(parent_index_oid, RelationRelationId, 0);
 
                /*
                 * We make use of IndexStmt's idxcomment option, so as not to
                 * need to know now what name the index will have.
                 */
                index_stmt->idxcomment = comment;
            }
 
            result = lappend(result, index_stmt);
 
            index_close(parent_index, AccessShareLock);
        }
    }
 
    /*
     * Process extended statistics if required.
     */
    if (table_like_clause->options & CREATE_TABLE_LIKE_STATISTICS)
    {
        List       *parent_extstats;
        ListCell   *l;
 
        parent_extstats = RelationGetStatExtList(relation);
 
        foreach(l, parent_extstats)
        {
            Oid         parent_stat_oid = lfirst_oid(l);
            CreateStatsStmt *stats_stmt;
 
            stats_stmt = generateClonedExtStatsStmt(heapRel,
                                                    RelationGetRelid(childrel),
                                                    parent_stat_oid,
                                                    attmap);
 
            /* Copy comment on statistics object, if requested */
            if (table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS)
            {
                comment = GetComment(parent_stat_oid, StatisticExtRelationId, 0);
 
                /*
                 * We make use of CreateStatsStmt's stxcomment option, so as
                 * not to need to know now what name the statistics will have.
                 */
                stats_stmt->stxcomment = comment;
            }
 
            result = lappend(result, stats_stmt);
        }
 
        list_free(parent_extstats);
    }
 
    /* Done with child rel */
    table_close(childrel, NoLock);
 
    /*
     * Close the parent rel, but keep our AccessShareLock on it until xact
     * commit.  That will prevent someone else from deleting or ALTERing the
     * parent before the child is committed.
     */
    table_close(relation, NoLock);
 
    return result;
}

References AccessShareLock, AT_AddConstraint, AT_CookedColumnDefault, AttrMap::attnums, build_attrmap_by_name(), ConstrCheck::ccbin, ConstrCheck::ccenforced, ConstrCheck::ccname, ConstrCheck::ccnoinherit, ConstrCheck::ccvalid, TupleConstr::check, AlterTableStmt::cmds, comment, Constraint::conname, TupleDescData::constr, CONSTR_CHECK, Constraint::contype, Constraint::cooked_expr, copyObject, CREATE_TABLE_LIKE_COMMENTS, CREATE_TABLE_LIKE_CONSTRAINTS, CREATE_TABLE_LIKE_DEFAULTS, CREATE_TABLE_LIKE_GENERATED, CREATE_TABLE_LIKE_INDEXES, CREATE_TABLE_LIKE_STATISTICS, AlterTableCmd::def, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, generateClonedExtStatsStmt(), generateClonedIndexStmt(), get_relation_constraint_oid(), GetComment(), IndexStmt::idxcomment, index_close(), index_open(), Constraint::initially_valid, InvalidOid, Constraint::is_enforced, Constraint::is_no_inherit, lappend(), lcons(), lfirst_oid, list_free(), list_make3, Constraint::location, makeNode, makeString(), map_variable_attnos(), AlterTableStmt::missing_ok, NameStr, TupleDescData::natts, NIL, nodeToString(), NoLock, AlterTableCmd::num, TupleConstr::num_check, OBJECT_TABCONSTRAINT, OBJECT_TABLE, AlterTableStmt::objtype, OidIsValid, TableLikeClause::options, pstrdup(), Constraint::raw_expr, RelationData::rd_rel, AlterTableStmt::relation, relation_open(), relation_openrv(), RelationGetDescr, RelationGetIndexList(), RelationGetRelationName, RelationGetRelid, RelationGetStatExtList(), TableLikeClause::relationOid, RangeVar::relname, RangeVar::schemaname, Constraint::skip_validation, stmt, stringToNode(), CreateStatsStmt::stxcomment, AlterTableCmd::subtype, table_close(), TupleDescAttr(), and TupleDescGetDefault().

Referenced by ProcessUtilitySlow().

◆ generateClonedExtStatsStmt()

static CreateStatsStmt * generateClonedExtStatsStmt	(	RangeVar *	heapRel,
		Oid	heapRelid,
		Oid	source_statsid,
		const AttrMap *	attmap
	)

static

Definition at line 2025 of file parse_utilcmd.c.

{
    HeapTuple   ht_stats;
    Form_pg_statistic_ext statsrec;
    CreateStatsStmt *stats;
    List       *stat_types = NIL;
    List       *def_names = NIL;
    bool        isnull;
    Datum       datum;
    ArrayType  *arr;
    char       *enabled;
    int         i;
 
    Assert(OidIsValid(heapRelid));
    Assert(heapRel != NULL);
 
    /*
     * Fetch pg_statistic_ext tuple of source statistics object.
     */
    ht_stats = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(source_statsid));
    if (!HeapTupleIsValid(ht_stats))
        elog(ERROR, "cache lookup failed for statistics object %u", source_statsid);
    statsrec = (Form_pg_statistic_ext) GETSTRUCT(ht_stats);
 
    /* Determine which statistics types exist */
    datum = SysCacheGetAttrNotNull(STATEXTOID, ht_stats,
                                   Anum_pg_statistic_ext_stxkind);
    arr = DatumGetArrayTypeP(datum);
    if (ARR_NDIM(arr) != 1 ||
        ARR_HASNULL(arr) ||
        ARR_ELEMTYPE(arr) != CHAROID)
        elog(ERROR, "stxkind is not a 1-D char array");
    enabled = (char *) ARR_DATA_PTR(arr);
    for (i = 0; i < ARR_DIMS(arr)[0]; i++)
    {
        if (enabled[i] == STATS_EXT_NDISTINCT)
            stat_types = lappend(stat_types, makeString("ndistinct"));
        else if (enabled[i] == STATS_EXT_DEPENDENCIES)
            stat_types = lappend(stat_types, makeString("dependencies"));
        else if (enabled[i] == STATS_EXT_MCV)
            stat_types = lappend(stat_types, makeString("mcv"));
        else if (enabled[i] == STATS_EXT_EXPRESSIONS)
            /* expression stats are not exposed to users */
            continue;
        else
            elog(ERROR, "unrecognized statistics kind %c", enabled[i]);
    }
 
    /* Determine which columns the statistics are on */
    for (i = 0; i < statsrec->stxkeys.dim1; i++)
    {
        StatsElem  *selem = makeNode(StatsElem);
        AttrNumber  attnum = statsrec->stxkeys.values[i];
 
        selem->name = get_attname(heapRelid, attnum, false);
        selem->expr = NULL;
 
        def_names = lappend(def_names, selem);
    }
 
    /*
     * Now handle expressions, if there are any. The order (with respect to
     * regular attributes) does not really matter for extended stats, so we
     * simply append them after simple column references.
     *
     * XXX Some places during build/estimation treat expressions as if they
     * are before attributes, but for the CREATE command that's entirely
     * irrelevant.
     */
    datum = SysCacheGetAttr(STATEXTOID, ht_stats,
                            Anum_pg_statistic_ext_stxexprs, &isnull);
 
    if (!isnull)
    {
        ListCell   *lc;
        List       *exprs = NIL;
        char       *exprsString;
 
        exprsString = TextDatumGetCString(datum);
        exprs = (List *) stringToNode(exprsString);
 
        foreach(lc, exprs)
        {
            Node       *expr = (Node *) lfirst(lc);
            StatsElem  *selem = makeNode(StatsElem);
            bool        found_whole_row;
 
            /* Adjust Vars to match new table's column numbering */
            expr = map_variable_attnos(expr,
                                       1, 0,
                                       attmap,
                                       InvalidOid,
                                       &found_whole_row);
 
            selem->name = NULL;
            selem->expr = expr;
 
            def_names = lappend(def_names, selem);
        }
 
        pfree(exprsString);
    }
 
    /* finally, build the output node */
    stats = makeNode(CreateStatsStmt);
    stats->defnames = NULL;
    stats->stat_types = stat_types;
    stats->exprs = def_names;
    stats->relations = list_make1(heapRel);
    stats->stxcomment = NULL;
    stats->transformed = true;  /* don't need transformStatsStmt again */
    stats->if_not_exists = false;
 
    /* Clean up */
    ReleaseSysCache(ht_stats);
 
    return stats;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, Assert(), attnum, DatumGetArrayTypeP, CreateStatsStmt::defnames, elog, ERROR, StatsElem::expr, CreateStatsStmt::exprs, get_attname(), GETSTRUCT(), HeapTupleIsValid, i, CreateStatsStmt::if_not_exists, InvalidOid, lappend(), lfirst, list_make1, makeNode, makeString(), map_variable_attnos(), StatsElem::name, NIL, ObjectIdGetDatum(), OidIsValid, pfree(), CreateStatsStmt::relations, ReleaseSysCache(), SearchSysCache1(), CreateStatsStmt::stat_types, stringToNode(), CreateStatsStmt::stxcomment, SysCacheGetAttr(), SysCacheGetAttrNotNull(), TextDatumGetCString, and CreateStatsStmt::transformed.

Referenced by expandTableLikeClause().

◆ generateClonedIndexStmt()

IndexStmt * generateClonedIndexStmt	(	RangeVar *	heapRel,
		Relation	source_idx,
		const AttrMap *	attmap,
		Oid *	constraintOid
	)

Definition at line 1671 of file parse_utilcmd.c.

{
    Oid         source_relid = RelationGetRelid(source_idx);
    HeapTuple   ht_idxrel;
    HeapTuple   ht_idx;
    HeapTuple   ht_am;
    Form_pg_class idxrelrec;
    Form_pg_index idxrec;
    Form_pg_am  amrec;
    oidvector  *indcollation;
    oidvector  *indclass;
    IndexStmt  *index;
    List       *indexprs;
    ListCell   *indexpr_item;
    Oid         indrelid;
    int         keyno;
    Oid         keycoltype;
    Datum       datum;
    bool        isnull;
 
    if (constraintOid)
        *constraintOid = InvalidOid;
 
    /*
     * Fetch pg_class tuple of source index.  We can't use the copy in the
     * relcache entry because it doesn't include optional fields.
     */
    ht_idxrel = SearchSysCache1(RELOID, ObjectIdGetDatum(source_relid));
    if (!HeapTupleIsValid(ht_idxrel))
        elog(ERROR, "cache lookup failed for relation %u", source_relid);
    idxrelrec = (Form_pg_class) GETSTRUCT(ht_idxrel);
 
    /* Fetch pg_index tuple for source index from relcache entry */
    ht_idx = source_idx->rd_indextuple;
    idxrec = (Form_pg_index) GETSTRUCT(ht_idx);
    indrelid = idxrec->indrelid;
 
    /* Fetch the pg_am tuple of the index' access method */
    ht_am = SearchSysCache1(AMOID, ObjectIdGetDatum(idxrelrec->relam));
    if (!HeapTupleIsValid(ht_am))
        elog(ERROR, "cache lookup failed for access method %u",
             idxrelrec->relam);
    amrec = (Form_pg_am) GETSTRUCT(ht_am);
 
    /* Extract indcollation from the pg_index tuple */
    datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx,
                                   Anum_pg_index_indcollation);
    indcollation = (oidvector *) DatumGetPointer(datum);
 
    /* Extract indclass from the pg_index tuple */
    datum = SysCacheGetAttrNotNull(INDEXRELID, ht_idx, Anum_pg_index_indclass);
    indclass = (oidvector *) DatumGetPointer(datum);
 
    /* Begin building the IndexStmt */
    index = makeNode(IndexStmt);
    index->relation = heapRel;
    index->accessMethod = pstrdup(NameStr(amrec->amname));
    if (OidIsValid(idxrelrec->reltablespace))
        index->tableSpace = get_tablespace_name(idxrelrec->reltablespace);
    else
        index->tableSpace = NULL;
    index->excludeOpNames = NIL;
    index->idxcomment = NULL;
    index->indexOid = InvalidOid;
    index->oldNumber = InvalidRelFileNumber;
    index->oldCreateSubid = InvalidSubTransactionId;
    index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
    index->unique = idxrec->indisunique;
    index->nulls_not_distinct = idxrec->indnullsnotdistinct;
    index->primary = idxrec->indisprimary;
    index->iswithoutoverlaps = (idxrec->indisprimary || idxrec->indisunique) && idxrec->indisexclusion;
    index->transformed = true;  /* don't need transformIndexStmt */
    index->concurrent = false;
    index->if_not_exists = false;
    index->reset_default_tblspc = false;
 
    /*
     * We don't try to preserve the name of the source index; instead, just
     * let DefineIndex() choose a reasonable name.  (If we tried to preserve
     * the name, we'd get duplicate-relation-name failures unless the source
     * table was in a different schema.)
     */
    index->idxname = NULL;
 
    /*
     * If the index is marked PRIMARY or has an exclusion condition, it's
     * certainly from a constraint; else, if it's not marked UNIQUE, it
     * certainly isn't.  If it is or might be from a constraint, we have to
     * fetch the pg_constraint record.
     */
    if (index->primary || index->unique || idxrec->indisexclusion)
    {
        Oid         constraintId = get_index_constraint(source_relid);
 
        if (OidIsValid(constraintId))
        {
            HeapTuple   ht_constr;
            Form_pg_constraint conrec;
 
            if (constraintOid)
                *constraintOid = constraintId;
 
            ht_constr = SearchSysCache1(CONSTROID,
                                        ObjectIdGetDatum(constraintId));
            if (!HeapTupleIsValid(ht_constr))
                elog(ERROR, "cache lookup failed for constraint %u",
                     constraintId);
            conrec = (Form_pg_constraint) GETSTRUCT(ht_constr);
 
            index->isconstraint = true;
            index->deferrable = conrec->condeferrable;
            index->initdeferred = conrec->condeferred;
 
            /* If it's an exclusion constraint, we need the operator names */
            if (idxrec->indisexclusion)
            {
                Datum      *elems;
                int         nElems;
                int         i;
 
                Assert(conrec->contype == CONSTRAINT_EXCLUSION ||
                       (index->iswithoutoverlaps &&
                        (conrec->contype == CONSTRAINT_PRIMARY || conrec->contype == CONSTRAINT_UNIQUE)));
                /* Extract operator OIDs from the pg_constraint tuple */
                datum = SysCacheGetAttrNotNull(CONSTROID, ht_constr,
                                               Anum_pg_constraint_conexclop);
                deconstruct_array_builtin(DatumGetArrayTypeP(datum), OIDOID, &elems, NULL, &nElems);
 
                for (i = 0; i < nElems; i++)
                {
                    Oid         operid = DatumGetObjectId(elems[i]);
                    HeapTuple   opertup;
                    Form_pg_operator operform;
                    char       *oprname;
                    char       *nspname;
                    List       *namelist;
 
                    opertup = SearchSysCache1(OPEROID,
                                              ObjectIdGetDatum(operid));
                    if (!HeapTupleIsValid(opertup))
                        elog(ERROR, "cache lookup failed for operator %u",
                             operid);
                    operform = (Form_pg_operator) GETSTRUCT(opertup);
                    oprname = pstrdup(NameStr(operform->oprname));
                    /* For simplicity we always schema-qualify the op name */
                    nspname = get_namespace_name(operform->oprnamespace);
                    namelist = list_make2(makeString(nspname),
                                          makeString(oprname));
                    index->excludeOpNames = lappend(index->excludeOpNames,
                                                    namelist);
                    ReleaseSysCache(opertup);
                }
            }
 
            ReleaseSysCache(ht_constr);
        }
        else
            index->isconstraint = false;
    }
    else
        index->isconstraint = false;
 
    /* Get the index expressions, if any */
    datum = SysCacheGetAttr(INDEXRELID, ht_idx,
                            Anum_pg_index_indexprs, &isnull);
    if (!isnull)
    {
        char       *exprsString;
 
        exprsString = TextDatumGetCString(datum);
        indexprs = (List *) stringToNode(exprsString);
    }
    else
        indexprs = NIL;
 
    /* Build the list of IndexElem */
    index->indexParams = NIL;
    index->indexIncludingParams = NIL;
 
    indexpr_item = list_head(indexprs);
    for (keyno = 0; keyno < idxrec->indnkeyatts; keyno++)
    {
        IndexElem  *iparam;
        AttrNumber  attnum = idxrec->indkey.values[keyno];
        Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
                                               keyno);
        int16       opt = source_idx->rd_indoption[keyno];
 
        iparam = makeNode(IndexElem);
 
        if (AttributeNumberIsValid(attnum))
        {
            /* Simple index column */
            char       *attname;
 
            attname = get_attname(indrelid, attnum, false);
            keycoltype = get_atttype(indrelid, attnum);
 
            iparam->name = attname;
            iparam->expr = NULL;
        }
        else
        {
            /* Expressional index */
            Node       *indexkey;
            bool        found_whole_row;
 
            if (indexpr_item == NULL)
                elog(ERROR, "too few entries in indexprs list");
            indexkey = (Node *) lfirst(indexpr_item);
            indexpr_item = lnext(indexprs, indexpr_item);
 
            /* Adjust Vars to match new table's column numbering */
            indexkey = map_variable_attnos(indexkey,
                                           1, 0,
                                           attmap,
                                           InvalidOid, &found_whole_row);
 
            /* As in expandTableLikeClause, reject whole-row variables */
            if (found_whole_row)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("cannot convert whole-row table reference"),
                         errdetail("Index \"%s\" contains a whole-row table reference.",
                                   RelationGetRelationName(source_idx))));
 
            iparam->name = NULL;
            iparam->expr = indexkey;
 
            keycoltype = exprType(indexkey);
        }
 
        /* Copy the original index column name */
        iparam->indexcolname = pstrdup(NameStr(attr->attname));
 
        /* Add the collation name, if non-default */
        iparam->collation = get_collation(indcollation->values[keyno], keycoltype);
 
        /* Add the operator class name, if non-default */
        iparam->opclass = get_opclass(indclass->values[keyno], keycoltype);
        iparam->opclassopts =
            untransformRelOptions(get_attoptions(source_relid, keyno + 1));
 
        iparam->ordering = SORTBY_DEFAULT;
        iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
 
        /* Adjust options if necessary */
        if (source_idx->rd_indam->amcanorder)
        {
            /*
             * If it supports sort ordering, copy DESC and NULLS opts. Don't
             * set non-default settings unnecessarily, though, so as to
             * improve the chance of recognizing equivalence to constraint
             * indexes.
             */
            if (opt & INDOPTION_DESC)
            {
                iparam->ordering = SORTBY_DESC;
                if ((opt & INDOPTION_NULLS_FIRST) == 0)
                    iparam->nulls_ordering = SORTBY_NULLS_LAST;
            }
            else
            {
                if (opt & INDOPTION_NULLS_FIRST)
                    iparam->nulls_ordering = SORTBY_NULLS_FIRST;
            }
        }
 
        index->indexParams = lappend(index->indexParams, iparam);
    }
 
    /* Handle included columns separately */
    for (keyno = idxrec->indnkeyatts; keyno < idxrec->indnatts; keyno++)
    {
        IndexElem  *iparam;
        AttrNumber  attnum = idxrec->indkey.values[keyno];
        Form_pg_attribute attr = TupleDescAttr(RelationGetDescr(source_idx),
                                               keyno);
 
        iparam = makeNode(IndexElem);
 
        if (AttributeNumberIsValid(attnum))
        {
            /* Simple index column */
            char       *attname;
 
            attname = get_attname(indrelid, attnum, false);
 
            iparam->name = attname;
            iparam->expr = NULL;
        }
        else
            ereport(ERROR,
                    (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                     errmsg("expressions are not supported in included columns")));
 
        /* Copy the original index column name */
        iparam->indexcolname = pstrdup(NameStr(attr->attname));
 
        index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
    }
    /* Copy reloptions if any */
    datum = SysCacheGetAttr(RELOID, ht_idxrel,
                            Anum_pg_class_reloptions, &isnull);
    if (!isnull)
        index->options = untransformRelOptions(datum);
 
    /* If it's a partial index, decompile and append the predicate */
    datum = SysCacheGetAttr(INDEXRELID, ht_idx,
                            Anum_pg_index_indpred, &isnull);
    if (!isnull)
    {
        char       *pred_str;
        Node       *pred_tree;
        bool        found_whole_row;
 
        /* Convert text string to node tree */
        pred_str = TextDatumGetCString(datum);
        pred_tree = (Node *) stringToNode(pred_str);
 
        /* Adjust Vars to match new table's column numbering */
        pred_tree = map_variable_attnos(pred_tree,
                                        1, 0,
                                        attmap,
                                        InvalidOid, &found_whole_row);
 
        /* As in expandTableLikeClause, reject whole-row variables */
        if (found_whole_row)
            ereport(ERROR,
                    (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                     errmsg("cannot convert whole-row table reference"),
                     errdetail("Index \"%s\" contains a whole-row table reference.",
                               RelationGetRelationName(source_idx))));
 
        index->whereClause = pred_tree;
    }
 
    /* Clean up */
    ReleaseSysCache(ht_idxrel);
    ReleaseSysCache(ht_am);
 
    return index;
}

References IndexAmRoutine::amcanorder, Assert(), attname, attnum, AttributeNumberIsValid, IndexElem::collation, DatumGetArrayTypeP, DatumGetObjectId(), DatumGetPointer(), deconstruct_array_builtin(), elog, ereport, errcode(), errdetail(), errmsg(), ERROR, IndexElem::expr, exprType(), get_attname(), get_attoptions(), get_atttype(), get_collation(), get_index_constraint(), get_namespace_name(), get_opclass(), get_tablespace_name(), GETSTRUCT(), HeapTupleIsValid, i, if(), IndexElem::indexcolname, InvalidOid, InvalidRelFileNumber, InvalidSubTransactionId, lappend(), lfirst, list_head(), list_make2, lnext(), makeNode, makeString(), map_variable_attnos(), IndexElem::name, NameStr, NIL, IndexElem::nulls_ordering, ObjectIdGetDatum(), OidIsValid, IndexElem::opclass, IndexElem::opclassopts, IndexElem::ordering, pstrdup(), RelationData::rd_indam, RelationData::rd_indextuple, RelationData::rd_indoption, RelationGetDescr, RelationGetRelationName, RelationGetRelid, ReleaseSysCache(), SearchSysCache1(), SORTBY_DEFAULT, SORTBY_DESC, SORTBY_NULLS_DEFAULT, SORTBY_NULLS_FIRST, SORTBY_NULLS_LAST, stringToNode(), SysCacheGetAttr(), SysCacheGetAttrNotNull(), TextDatumGetCString, TupleDescAttr(), untransformRelOptions(), and oidvector::values.

Referenced by AttachPartitionEnsureIndexes(), DefineIndex(), DefineRelation(), and expandTableLikeClause().

◆ generateSerialExtraStmts()

static void generateSerialExtraStmts	(	CreateStmtContext *	cxt,
		ColumnDef *	column,
		Oid	seqtypid,
		List *	seqoptions,
		bool	for_identity,
		bool	col_exists,
		char **	snamespace_p,
		char **	sname_p
	)

static

Definition at line 390 of file parse_utilcmd.c.

{
    ListCell   *option;
    DefElem    *nameEl = NULL;
    DefElem    *loggedEl = NULL;
    Oid         snamespaceid;
    char       *snamespace;
    char       *sname;
    char        seqpersistence;
    CreateSeqStmt *seqstmt;
    AlterSeqStmt *altseqstmt;
    List       *attnamelist;
 
    /* Make a copy of this as we may end up modifying it in the code below */
    seqoptions = list_copy(seqoptions);
 
    /*
     * Check for non-SQL-standard options (not supported within CREATE
     * SEQUENCE, because they'd be redundant), and remove them from the
     * seqoptions list if found.
     */
    foreach(option, seqoptions)
    {
        DefElem    *defel = lfirst_node(DefElem, option);
 
        if (strcmp(defel->defname, "sequence_name") == 0)
        {
            if (nameEl)
                errorConflictingDefElem(defel, cxt->pstate);
            nameEl = defel;
            seqoptions = foreach_delete_current(seqoptions, option);
        }
        else if (strcmp(defel->defname, "logged") == 0 ||
                 strcmp(defel->defname, "unlogged") == 0)
        {
            if (loggedEl)
                errorConflictingDefElem(defel, cxt->pstate);
            loggedEl = defel;
            seqoptions = foreach_delete_current(seqoptions, option);
        }
    }
 
    /*
     * Determine namespace and name to use for the sequence.
     */
    if (nameEl)
    {
        /* Use specified name */
        RangeVar   *rv = makeRangeVarFromNameList(castNode(List, nameEl->arg));
 
        snamespace = rv->schemaname;
        if (!snamespace)
        {
            /* Given unqualified SEQUENCE NAME, select namespace */
            if (cxt->rel)
                snamespaceid = RelationGetNamespace(cxt->rel);
            else
                snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
            snamespace = get_namespace_name(snamespaceid);
        }
        sname = rv->relname;
    }
    else
    {
        /*
         * Generate a name.
         *
         * Although we use ChooseRelationName, it's not guaranteed that the
         * selected sequence name won't conflict; given sufficiently long
         * field names, two different serial columns in the same table could
         * be assigned the same sequence name, and we'd not notice since we
         * aren't creating the sequence quite yet.  In practice this seems
         * quite unlikely to be a problem, especially since few people would
         * need two serial columns in one table.
         */
        if (cxt->rel)
            snamespaceid = RelationGetNamespace(cxt->rel);
        else
        {
            snamespaceid = RangeVarGetCreationNamespace(cxt->relation);
            RangeVarAdjustRelationPersistence(cxt->relation, snamespaceid);
        }
        snamespace = get_namespace_name(snamespaceid);
        sname = ChooseRelationName(cxt->relation->relname,
                                   column->colname,
                                   "seq",
                                   snamespaceid,
                                   false);
    }
 
    ereport(DEBUG1,
            (errmsg_internal("%s will create implicit sequence \"%s\" for serial column \"%s.%s\"",
                             cxt->stmtType, sname,
                             cxt->relation->relname, column->colname)));
 
    /*
     * Determine the persistence of the sequence.  By default we copy the
     * persistence of the table, but if LOGGED or UNLOGGED was specified, use
     * that (as long as the table isn't TEMP).
     *
     * For CREATE TABLE, we get the persistence from cxt->relation, which
     * comes from the CreateStmt in progress.  For ALTER TABLE, the parser
     * won't set cxt->relation->relpersistence, but we have cxt->rel as the
     * existing table, so we copy the persistence from there.
     */
    seqpersistence = cxt->rel ? cxt->rel->rd_rel->relpersistence : cxt->relation->relpersistence;
    if (loggedEl)
    {
        if (seqpersistence == RELPERSISTENCE_TEMP)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("cannot set logged status of a temporary sequence"),
                     parser_errposition(cxt->pstate, loggedEl->location)));
        else if (strcmp(loggedEl->defname, "logged") == 0)
            seqpersistence = RELPERSISTENCE_PERMANENT;
        else
            seqpersistence = RELPERSISTENCE_UNLOGGED;
    }
 
    /*
     * Build a CREATE SEQUENCE command to create the sequence object, and add
     * it to the list of things to be done before this CREATE/ALTER TABLE.
     */
    seqstmt = makeNode(CreateSeqStmt);
    seqstmt->for_identity = for_identity;
    seqstmt->sequence = makeRangeVar(snamespace, sname, -1);
    seqstmt->sequence->relpersistence = seqpersistence;
    seqstmt->options = seqoptions;
 
    /*
     * If a sequence data type was specified, add it to the options.  Prepend
     * to the list rather than append; in case a user supplied their own AS
     * clause, the "redundant options" error will point to their occurrence,
     * not our synthetic one.
     */
    if (seqtypid)
        seqstmt->options = lcons(makeDefElem("as",
                                             (Node *) makeTypeNameFromOid(seqtypid, -1),
                                             -1),
                                 seqstmt->options);
 
    /*
     * If this is ALTER ADD COLUMN, make sure the sequence will be owned by
     * the table's owner.  The current user might be someone else (perhaps a
     * superuser, or someone who's only a member of the owning role), but the
     * SEQUENCE OWNED BY mechanisms will bleat unless table and sequence have
     * exactly the same owning role.
     */
    if (cxt->rel)
        seqstmt->ownerId = cxt->rel->rd_rel->relowner;
    else
        seqstmt->ownerId = InvalidOid;
 
    cxt->blist = lappend(cxt->blist, seqstmt);
 
    /*
     * Store the identity sequence name that we decided on.  ALTER TABLE ...
     * ADD COLUMN ... IDENTITY needs this so that it can fill the new column
     * with values from the sequence, while the association of the sequence
     * with the table is not set until after the ALTER TABLE.
     */
    column->identitySequence = seqstmt->sequence;
 
    /*
     * Build an ALTER SEQUENCE ... OWNED BY command to mark the sequence as
     * owned by this column, and add it to the appropriate list of things to
     * be done along with this CREATE/ALTER TABLE.  In a CREATE or ALTER ADD
     * COLUMN, it must be done after the statement because we don't know the
     * column's attnum yet.  But if we do have the attnum (in AT_AddIdentity),
     * we can do the marking immediately, which improves some ALTER TABLE
     * behaviors.
     */
    altseqstmt = makeNode(AlterSeqStmt);
    altseqstmt->sequence = makeRangeVar(snamespace, sname, -1);
    attnamelist = list_make3(makeString(snamespace),
                             makeString(cxt->relation->relname),
                             makeString(column->colname));
    altseqstmt->options = list_make1(makeDefElem("owned_by",
                                                 (Node *) attnamelist, -1));
    altseqstmt->for_identity = for_identity;
 
    if (col_exists)
        cxt->blist = lappend(cxt->blist, altseqstmt);
    else
        cxt->alist = lappend(cxt->alist, altseqstmt);
 
    if (snamespace_p)
        *snamespace_p = snamespace;
    if (sname_p)
        *sname_p = sname;
}

References CreateStmtContext::alist, DefElem::arg, CreateStmtContext::blist, castNode, ChooseRelationName(), ColumnDef::colname, DEBUG1, DefElem::defname, ereport, errcode(), errmsg(), errmsg_internal(), ERROR, errorConflictingDefElem(), CreateSeqStmt::for_identity, AlterSeqStmt::for_identity, foreach_delete_current, get_namespace_name(), ColumnDef::identitySequence, InvalidOid, lappend(), lcons(), lfirst_node, list_copy(), list_make1, list_make3, DefElem::location, makeDefElem(), makeNode, makeRangeVar(), makeRangeVarFromNameList(), makeString(), makeTypeNameFromOid(), CreateSeqStmt::options, AlterSeqStmt::options, CreateSeqStmt::ownerId, parser_errposition(), CreateStmtContext::pstate, RangeVarAdjustRelationPersistence(), RangeVarGetCreationNamespace(), RelationData::rd_rel, CreateStmtContext::rel, CreateStmtContext::relation, RelationGetNamespace, RangeVar::relname, RangeVar::relpersistence, RangeVar::schemaname, CreateSeqStmt::sequence, AlterSeqStmt::sequence, and CreateStmtContext::stmtType.

Referenced by transformAlterTableStmt(), transformColumnDefinition(), and transformTableLikeClause().

◆ get_collation()

static List * get_collation	(	Oid	collation,
		Oid	actual_datatype
	)

static

Definition at line 2152 of file parse_utilcmd.c.

{
    List       *result;
    HeapTuple   ht_coll;
    Form_pg_collation coll_rec;
    char       *nsp_name;
    char       *coll_name;
 
    if (!OidIsValid(collation))
        return NIL;             /* easy case */
    if (collation == get_typcollation(actual_datatype))
        return NIL;             /* just let it default */
 
    ht_coll = SearchSysCache1(COLLOID, ObjectIdGetDatum(collation));
    if (!HeapTupleIsValid(ht_coll))
        elog(ERROR, "cache lookup failed for collation %u", collation);
    coll_rec = (Form_pg_collation) GETSTRUCT(ht_coll);
 
    /* For simplicity, we always schema-qualify the name */
    nsp_name = get_namespace_name(coll_rec->collnamespace);
    coll_name = pstrdup(NameStr(coll_rec->collname));
    result = list_make2(makeString(nsp_name), makeString(coll_name));
 
    ReleaseSysCache(ht_coll);
    return result;
}

References elog, ERROR, get_namespace_name(), get_typcollation(), GETSTRUCT(), HeapTupleIsValid, list_make2, makeString(), NameStr, NIL, ObjectIdGetDatum(), OidIsValid, pstrdup(), ReleaseSysCache(), and SearchSysCache1().

Referenced by generateClonedIndexStmt().

◆ get_opclass()

static List * get_opclass	(	Oid	opclass,
		Oid	actual_datatype
	)

static

Definition at line 2186 of file parse_utilcmd.c.

{
    List       *result = NIL;
    HeapTuple   ht_opc;
    Form_pg_opclass opc_rec;
 
    ht_opc = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclass));
    if (!HeapTupleIsValid(ht_opc))
        elog(ERROR, "cache lookup failed for opclass %u", opclass);
    opc_rec = (Form_pg_opclass) GETSTRUCT(ht_opc);
 
    if (GetDefaultOpClass(actual_datatype, opc_rec->opcmethod) != opclass)
    {
        /* For simplicity, we always schema-qualify the name */
        char       *nsp_name = get_namespace_name(opc_rec->opcnamespace);
        char       *opc_name = pstrdup(NameStr(opc_rec->opcname));
 
        result = list_make2(makeString(nsp_name), makeString(opc_name));
    }
 
    ReleaseSysCache(ht_opc);
    return result;
}

References elog, ERROR, get_namespace_name(), GetDefaultOpClass(), GETSTRUCT(), HeapTupleIsValid, list_make2, makeString(), NameStr, NIL, ObjectIdGetDatum(), pstrdup(), ReleaseSysCache(), and SearchSysCache1().

Referenced by generateClonedIndexStmt().

◆ setSchemaName()

static void setSchemaName	(	const char *	context_schema,
		char **	stmt_schema_name
	)

static

Definition at line 4184 of file parse_utilcmd.c.

{
    if (*stmt_schema_name == NULL)
        *stmt_schema_name = unconstify(char *, context_schema);
    else if (strcmp(context_schema, *stmt_schema_name) != 0)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
                 errmsg("CREATE specifies a schema (%s) "
                        "different from the one being created (%s)",
                        *stmt_schema_name, context_schema)));
}

References ereport, errcode(), errmsg(), ERROR, and unconstify.

Referenced by transformCreateSchemaStmtElements().

◆ transformAlterTableStmt()

AlterTableStmt * transformAlterTableStmt	(	Oid	relid,
		AlterTableStmt *	stmt,
		const char *	queryString,
		List **	beforeStmts,
		List **	afterStmts
	)

Definition at line 3504 of file parse_utilcmd.c.

{
    Relation    rel;
    TupleDesc   tupdesc;
    ParseState *pstate;
    CreateStmtContext cxt;
    List       *save_alist;
    ListCell   *lcmd,
               *l;
    List       *newcmds = NIL;
    bool        skipValidation = true;
    AlterTableCmd *newcmd;
    ParseNamespaceItem *nsitem;
 
    /* Caller is responsible for locking the relation */
    rel = relation_open(relid, NoLock);
    tupdesc = RelationGetDescr(rel);
 
    /* Set up pstate */
    pstate = make_parsestate(NULL);
    pstate->p_sourcetext = queryString;
    nsitem = addRangeTableEntryForRelation(pstate,
                                           rel,
                                           AccessShareLock,
                                           NULL,
                                           false,
                                           true);
    addNSItemToQuery(pstate, nsitem, false, true, true);
 
    /* Set up CreateStmtContext */
    cxt.pstate = pstate;
    if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
    {
        cxt.stmtType = "ALTER FOREIGN TABLE";
        cxt.isforeign = true;
    }
    else
    {
        cxt.stmtType = "ALTER TABLE";
        cxt.isforeign = false;
    }
    cxt.relation = stmt->relation;
    cxt.rel = rel;
    cxt.inhRelations = NIL;
    cxt.isalter = true;
    cxt.columns = NIL;
    cxt.ckconstraints = NIL;
    cxt.nnconstraints = NIL;
    cxt.fkconstraints = NIL;
    cxt.ixconstraints = NIL;
    cxt.likeclauses = NIL;
    cxt.blist = NIL;
    cxt.alist = NIL;
    cxt.pkey = NULL;
    cxt.ispartitioned = (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
    cxt.partbound = NULL;
    cxt.ofType = false;
 
    /*
     * Transform ALTER subcommands that need it (most don't).  These largely
     * re-use code from CREATE TABLE.
     */
    foreach(lcmd, stmt->cmds)
    {
        AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
 
        switch (cmd->subtype)
        {
            case AT_AddColumn:
                {
                    ColumnDef  *def = castNode(ColumnDef, cmd->def);
 
                    transformColumnDefinition(&cxt, def);
 
                    /*
                     * If the column has a non-null default, we can't skip
                     * validation of foreign keys.
                     */
                    if (def->raw_default != NULL)
                        skipValidation = false;
 
                    /*
                     * All constraints are processed in other ways. Remove the
                     * original list
                     */
                    def->constraints = NIL;
 
                    newcmds = lappend(newcmds, cmd);
                    break;
                }
 
            case AT_AddConstraint:
 
                /*
                 * The original AddConstraint cmd node doesn't go to newcmds
                 */
                if (IsA(cmd->def, Constraint))
                {
                    transformTableConstraint(&cxt, (Constraint *) cmd->def);
                    if (((Constraint *) cmd->def)->contype == CONSTR_FOREIGN)
                        skipValidation = false;
                }
                else
                    elog(ERROR, "unrecognized node type: %d",
                         (int) nodeTag(cmd->def));
                break;
 
            case AT_AlterColumnType:
                {
                    ColumnDef  *def = castNode(ColumnDef, cmd->def);
                    AttrNumber  attnum;
 
                    /*
                     * For ALTER COLUMN TYPE, transform the USING clause if
                     * one was specified.
                     */
                    if (def->raw_default)
                    {
                        def->cooked_default =
                            transformExpr(pstate, def->raw_default,
                                          EXPR_KIND_ALTER_COL_TRANSFORM);
                    }
 
                    /*
                     * For identity column, create ALTER SEQUENCE command to
                     * change the data type of the sequence. Identity sequence
                     * is associated with the top level partitioned table.
                     * Hence ignore partitions.
                     */
                    if (!RelationGetForm(rel)->relispartition)
                    {
                        attnum = get_attnum(relid, cmd->name);
                        if (attnum == InvalidAttrNumber)
                            ereport(ERROR,
                                    (errcode(ERRCODE_UNDEFINED_COLUMN),
                                     errmsg("column \"%s\" of relation \"%s\" does not exist",
                                            cmd->name, RelationGetRelationName(rel))));
 
                        if (attnum > 0 &&
                            TupleDescAttr(tupdesc, attnum - 1)->attidentity)
                        {
                            Oid         seq_relid = getIdentitySequence(rel, attnum, false);
                            Oid         typeOid = typenameTypeId(pstate, def->typeName);
                            AlterSeqStmt *altseqstmt = makeNode(AlterSeqStmt);
 
                            altseqstmt->sequence
                                = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
                                               get_rel_name(seq_relid),
                                               -1);
                            altseqstmt->options = list_make1(makeDefElem("as",
                                                                         (Node *) makeTypeNameFromOid(typeOid, -1),
                                                                         -1));
                            altseqstmt->for_identity = true;
                            cxt.blist = lappend(cxt.blist, altseqstmt);
                        }
                    }
 
                    newcmds = lappend(newcmds, cmd);
                    break;
                }
 
            case AT_AddIdentity:
                {
                    Constraint *def = castNode(Constraint, cmd->def);
                    ColumnDef  *newdef = makeNode(ColumnDef);
                    AttrNumber  attnum;
 
                    newdef->colname = cmd->name;
                    newdef->identity = def->generated_when;
                    cmd->def = (Node *) newdef;
 
                    attnum = get_attnum(relid, cmd->name);
                    if (attnum == InvalidAttrNumber)
                        ereport(ERROR,
                                (errcode(ERRCODE_UNDEFINED_COLUMN),
                                 errmsg("column \"%s\" of relation \"%s\" does not exist",
                                        cmd->name, RelationGetRelationName(rel))));
 
                    generateSerialExtraStmts(&cxt, newdef,
                                             get_atttype(relid, attnum),
                                             def->options, true, true,
                                             NULL, NULL);
 
                    newcmds = lappend(newcmds, cmd);
                    break;
                }
 
            case AT_SetIdentity:
                {
                    /*
                     * Create an ALTER SEQUENCE statement for the internal
                     * sequence of the identity column.
                     */
                    ListCell   *lc;
                    List       *newseqopts = NIL;
                    List       *newdef = NIL;
                    AttrNumber  attnum;
                    Oid         seq_relid;
 
                    /*
                     * Split options into those handled by ALTER SEQUENCE and
                     * those for ALTER TABLE proper.
                     */
                    foreach(lc, castNode(List, cmd->def))
                    {
                        DefElem    *def = lfirst_node(DefElem, lc);
 
                        if (strcmp(def->defname, "generated") == 0)
                            newdef = lappend(newdef, def);
                        else
                            newseqopts = lappend(newseqopts, def);
                    }
 
                    attnum = get_attnum(relid, cmd->name);
                    if (attnum == InvalidAttrNumber)
                        ereport(ERROR,
                                (errcode(ERRCODE_UNDEFINED_COLUMN),
                                 errmsg("column \"%s\" of relation \"%s\" does not exist",
                                        cmd->name, RelationGetRelationName(rel))));
 
                    seq_relid = getIdentitySequence(rel, attnum, true);
 
                    if (seq_relid)
                    {
                        AlterSeqStmt *seqstmt;
 
                        seqstmt = makeNode(AlterSeqStmt);
                        seqstmt->sequence = makeRangeVar(get_namespace_name(get_rel_namespace(seq_relid)),
                                                         get_rel_name(seq_relid), -1);
                        seqstmt->options = newseqopts;
                        seqstmt->for_identity = true;
                        seqstmt->missing_ok = false;
 
                        cxt.blist = lappend(cxt.blist, seqstmt);
                    }
 
                    /*
                     * If column was not an identity column, we just let the
                     * ALTER TABLE command error out later.  (There are cases
                     * this fails to cover, but we'll need to restructure
                     * where creation of the sequence dependency linkage
                     * happens before we can fix it.)
                     */
 
                    cmd->def = (Node *) newdef;
                    newcmds = lappend(newcmds, cmd);
                    break;
                }
 
            case AT_AttachPartition:
            case AT_DetachPartition:
                {
                    PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
 
                    transformPartitionCmd(&cxt, partcmd);
                    /* assign transformed value of the partition bound */
                    partcmd->bound = cxt.partbound;
                }
 
                newcmds = lappend(newcmds, cmd);
                break;
 
            default:
 
                /*
                 * Currently, we shouldn't actually get here for subcommand
                 * types that don't require transformation; but if we do, just
                 * emit them unchanged.
                 */
                newcmds = lappend(newcmds, cmd);
                break;
        }
    }
 
    /*
     * Transfer anything we already have in cxt.alist into save_alist, to keep
     * it separate from the output of transformIndexConstraints.
     */
    save_alist = cxt.alist;
    cxt.alist = NIL;
 
    /* Postprocess constraints */
    transformIndexConstraints(&cxt);
    transformFKConstraints(&cxt, skipValidation, true);
    transformCheckConstraints(&cxt, false);
 
    /*
     * Push any index-creation commands into the ALTER, so that they can be
     * scheduled nicely by tablecmds.c.  Note that tablecmds.c assumes that
     * the IndexStmt attached to an AT_AddIndex or AT_AddIndexConstraint
     * subcommand has already been through transformIndexStmt.
     */
    foreach(l, cxt.alist)
    {
        Node       *istmt = (Node *) lfirst(l);
 
        /*
         * We assume here that cxt.alist contains only IndexStmts generated
         * from primary key constraints.
         */
        if (IsA(istmt, IndexStmt))
        {
            IndexStmt  *idxstmt = (IndexStmt *) istmt;
 
            idxstmt = transformIndexStmt(relid, idxstmt, queryString);
            newcmd = makeNode(AlterTableCmd);
            newcmd->subtype = OidIsValid(idxstmt->indexOid) ? AT_AddIndexConstraint : AT_AddIndex;
            newcmd->def = (Node *) idxstmt;
            newcmds = lappend(newcmds, newcmd);
        }
        else
            elog(ERROR, "unexpected stmt type %d", (int) nodeTag(istmt));
    }
    cxt.alist = NIL;
 
    /* Append any CHECK, NOT NULL or FK constraints to the commands list */
    foreach_node(Constraint, def, cxt.ckconstraints)
    {
        newcmd = makeNode(AlterTableCmd);
        newcmd->subtype = AT_AddConstraint;
        newcmd->def = (Node *) def;
        newcmds = lappend(newcmds, newcmd);
    }
    foreach_node(Constraint, def, cxt.nnconstraints)
    {
        newcmd = makeNode(AlterTableCmd);
        newcmd->subtype = AT_AddConstraint;
        newcmd->def = (Node *) def;
        newcmds = lappend(newcmds, newcmd);
    }
    foreach_node(Constraint, def, cxt.fkconstraints)
    {
        newcmd = makeNode(AlterTableCmd);
        newcmd->subtype = AT_AddConstraint;
        newcmd->def = (Node *) def;
        newcmds = lappend(newcmds, newcmd);
    }
 
    /* Close rel */
    relation_close(rel, NoLock);
 
    /*
     * Output results.
     */
    stmt->cmds = newcmds;
 
    *beforeStmts = cxt.blist;
    *afterStmts = list_concat(cxt.alist, save_alist);
 
    return stmt;
}

Referenced by ATParseTransformCmd(), and ATPostAlterTypeParse().

◆ transformCheckConstraints()

static void transformCheckConstraints	(	CreateStmtContext *	cxt,
		bool	skipValidation
	)

static

Definition at line 2924 of file parse_utilcmd.c.

{
    ListCell   *ckclist;
 
    if (cxt->ckconstraints == NIL)
        return;
 
    /*
     * When creating a new table (but not a foreign table), we can safely skip
     * the validation of check constraints and mark them as valid based on the
     * constraint enforcement flag, since NOT ENFORCED constraints must always
     * be marked as NOT VALID. (This will override any user-supplied NOT VALID
     * flag.)
     */
    if (skipValidation)
    {
        foreach(ckclist, cxt->ckconstraints)
        {
            Constraint *constraint = (Constraint *) lfirst(ckclist);
 
            constraint->skip_validation = true;
            constraint->initially_valid = constraint->is_enforced;
        }
    }
}

References CreateStmtContext::ckconstraints, Constraint::initially_valid, Constraint::is_enforced, lfirst, NIL, and Constraint::skip_validation.

Referenced by transformAlterTableStmt(), and transformCreateStmt().

◆ transformColumnDefinition()

static void transformColumnDefinition	(	CreateStmtContext *	cxt,
		ColumnDef *	column
	)

static

Definition at line 591 of file parse_utilcmd.c.

{
    bool        is_serial;
    bool        saw_nullable;
    bool        saw_default;
    bool        saw_identity;
    bool        saw_generated;
    bool        need_notnull = false;
    bool        disallow_noinherit_notnull = false;
    Constraint *notnull_constraint = NULL;
 
    cxt->columns = lappend(cxt->columns, column);
 
    /* Check for SERIAL pseudo-types */
    is_serial = false;
    if (column->typeName
        && list_length(column->typeName->names) == 1
        && !column->typeName->pct_type)
    {
        char       *typname = strVal(linitial(column->typeName->names));
 
        if (strcmp(typname, "smallserial") == 0 ||
            strcmp(typname, "serial2") == 0)
        {
            is_serial = true;
            column->typeName->names = NIL;
            column->typeName->typeOid = INT2OID;
        }
        else if (strcmp(typname, "serial") == 0 ||
                 strcmp(typname, "serial4") == 0)
        {
            is_serial = true;
            column->typeName->names = NIL;
            column->typeName->typeOid = INT4OID;
        }
        else if (strcmp(typname, "bigserial") == 0 ||
                 strcmp(typname, "serial8") == 0)
        {
            is_serial = true;
            column->typeName->names = NIL;
            column->typeName->typeOid = INT8OID;
        }
 
        /*
         * We have to reject "serial[]" explicitly, because once we've set
         * typeid, LookupTypeName won't notice arrayBounds.  We don't need any
         * special coding for serial(typmod) though.
         */
        if (is_serial && column->typeName->arrayBounds != NIL)
            ereport(ERROR,
                    (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                     errmsg("array of serial is not implemented"),
                     parser_errposition(cxt->pstate,
                                        column->typeName->location)));
    }
 
    /* Do necessary work on the column type declaration */
    if (column->typeName)
        transformColumnType(cxt, column);
 
    /* Special actions for SERIAL pseudo-types */
    if (is_serial)
    {
        char       *snamespace;
        char       *sname;
        char       *qstring;
        A_Const    *snamenode;
        TypeCast   *castnode;
        FuncCall   *funccallnode;
        Constraint *constraint;
 
        generateSerialExtraStmts(cxt, column,
                                 column->typeName->typeOid, NIL,
                                 false, false,
                                 &snamespace, &sname);
 
        /*
         * Create appropriate constraints for SERIAL.  We do this in full,
         * rather than shortcutting, so that we will detect any conflicting
         * constraints the user wrote (like a different DEFAULT).
         *
         * Create an expression tree representing the function call
         * nextval('sequencename').  We cannot reduce the raw tree to cooked
         * form until after the sequence is created, but there's no need to do
         * so.
         */
        qstring = quote_qualified_identifier(snamespace, sname);
        snamenode = makeNode(A_Const);
        snamenode->val.node.type = T_String;
        snamenode->val.sval.sval = qstring;
        snamenode->location = -1;
        castnode = makeNode(TypeCast);
        castnode->typeName = SystemTypeName("regclass");
        castnode->arg = (Node *) snamenode;
        castnode->location = -1;
        funccallnode = makeFuncCall(SystemFuncName("nextval"),
                                    list_make1(castnode),
                                    COERCE_EXPLICIT_CALL,
                                    -1);
        constraint = makeNode(Constraint);
        constraint->contype = CONSTR_DEFAULT;
        constraint->location = -1;
        constraint->raw_expr = (Node *) funccallnode;
        constraint->cooked_expr = NULL;
        column->constraints = lappend(column->constraints, constraint);
 
        /* have a not-null constraint added later */
        need_notnull = true;
        disallow_noinherit_notnull = true;
    }
 
    /* Process column constraints, if any... */
    transformConstraintAttrs(cxt, column->constraints);
 
    /*
     * First, scan the column's constraints to see if a not-null constraint
     * that we add must be prevented from being NO INHERIT.  This should be
     * enforced only for PRIMARY KEY, not IDENTITY or SERIAL.  However, if the
     * not-null constraint is specified as a table constraint rather than as a
     * column constraint, AddRelationNotNullConstraints would raise an error
     * if a NO INHERIT mismatch is found.  To avoid inconsistently disallowing
     * it in the table constraint case but not the column constraint case, we
     * disallow it here as well.  Maybe AddRelationNotNullConstraints can be
     * improved someday, so that it doesn't complain, and then we can remove
     * the restriction for SERIAL and IDENTITY here as well.
     */
    if (!disallow_noinherit_notnull)
    {
        foreach_node(Constraint, constraint, column->constraints)
        {
            switch (constraint->contype)
            {
                case CONSTR_IDENTITY:
                case CONSTR_PRIMARY:
                    disallow_noinherit_notnull = true;
                    break;
                default:
                    break;
            }
        }
    }
 
    /* Now scan them again to do full processing */
    saw_nullable = false;
    saw_default = false;
    saw_identity = false;
    saw_generated = false;
 
    foreach_node(Constraint, constraint, column->constraints)
    {
        switch (constraint->contype)
        {
            case CONSTR_NULL:
                if ((saw_nullable && column->is_not_null) || need_notnull)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
                                    column->colname, cxt->relation->relname),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                column->is_not_null = false;
                saw_nullable = true;
                break;
 
            case CONSTR_NOTNULL:
                if (cxt->ispartitioned && constraint->is_no_inherit)
                    ereport(ERROR,
                            errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                            errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
 
                /* Disallow conflicting [NOT] NULL markings */
                if (saw_nullable && !column->is_not_null)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
                                    column->colname, cxt->relation->relname),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
 
                if (disallow_noinherit_notnull && constraint->is_no_inherit)
                    ereport(ERROR,
                            errcode(ERRCODE_SYNTAX_ERROR),
                            errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
                                   column->colname));
 
                /*
                 * If this is the first time we see this column being marked
                 * not-null, add the constraint entry and keep track of it.
                 * Also, remove previous markings that we need one.
                 *
                 * If this is a redundant not-null specification, just check
                 * that it doesn't conflict with what was specified earlier.
                 *
                 * Any conflicts with table constraints will be further
                 * checked in AddRelationNotNullConstraints().
                 */
                if (!column->is_not_null)
                {
                    column->is_not_null = true;
                    saw_nullable = true;
                    need_notnull = false;
 
                    constraint->keys = list_make1(makeString(column->colname));
                    notnull_constraint = constraint;
                    cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
                }
                else if (notnull_constraint)
                {
                    if (constraint->conname &&
                        notnull_constraint->conname &&
                        strcmp(notnull_constraint->conname, constraint->conname) != 0)
                        elog(ERROR, "conflicting not-null constraint names \"%s\" and \"%s\"",
                             notnull_constraint->conname, constraint->conname);
 
                    if (notnull_constraint->is_no_inherit != constraint->is_no_inherit)
                        ereport(ERROR,
                                errcode(ERRCODE_SYNTAX_ERROR),
                                errmsg("conflicting NO INHERIT declarations for not-null constraints on column \"%s\"",
                                       column->colname));
 
                    if (!notnull_constraint->conname && constraint->conname)
                        notnull_constraint->conname = constraint->conname;
                }
 
                break;
 
            case CONSTR_DEFAULT:
                if (saw_default)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple default values specified for column \"%s\" of table \"%s\"",
                                    column->colname, cxt->relation->relname),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                column->raw_default = constraint->raw_expr;
                Assert(constraint->cooked_expr == NULL);
                saw_default = true;
                break;
 
            case CONSTR_IDENTITY:
                {
                    Type        ctype;
                    Oid         typeOid;
 
                    if (cxt->ofType)
                        ereport(ERROR,
                                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                                 errmsg("identity columns are not supported on typed tables")));
                    if (cxt->partbound)
                        ereport(ERROR,
                                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                                 errmsg("identity columns are not supported on partitions")));
 
                    ctype = typenameType(cxt->pstate, column->typeName, NULL);
                    typeOid = ((Form_pg_type) GETSTRUCT(ctype))->oid;
                    ReleaseSysCache(ctype);
 
                    if (saw_identity)
                        ereport(ERROR,
                                (errcode(ERRCODE_SYNTAX_ERROR),
                                 errmsg("multiple identity specifications for column \"%s\" of table \"%s\"",
                                        column->colname, cxt->relation->relname),
                                 parser_errposition(cxt->pstate,
                                                    constraint->location)));
 
                    generateSerialExtraStmts(cxt, column,
                                             typeOid, constraint->options,
                                             true, false,
                                             NULL, NULL);
 
                    column->identity = constraint->generated_when;
                    saw_identity = true;
 
                    /*
                     * Identity columns are always NOT NULL, but we may have a
                     * constraint already.
                     */
                    if (!saw_nullable)
                        need_notnull = true;
                    else if (!column->is_not_null)
                        ereport(ERROR,
                                (errcode(ERRCODE_SYNTAX_ERROR),
                                 errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
                                        column->colname, cxt->relation->relname),
                                 parser_errposition(cxt->pstate,
                                                    constraint->location)));
                    break;
                }
 
            case CONSTR_GENERATED:
                if (cxt->ofType)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("generated columns are not supported on typed tables")));
                if (saw_generated)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple generation clauses specified for column \"%s\" of table \"%s\"",
                                    column->colname, cxt->relation->relname),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                column->generated = constraint->generated_kind;
                column->raw_default = constraint->raw_expr;
                Assert(constraint->cooked_expr == NULL);
                saw_generated = true;
                break;
 
            case CONSTR_CHECK:
                cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
                break;
 
            case CONSTR_PRIMARY:
                if (saw_nullable && !column->is_not_null)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
                                    column->colname, cxt->relation->relname),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                need_notnull = true;
 
                if (cxt->isforeign)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("primary key constraints are not supported on foreign tables"),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                /* FALL THRU */
 
            case CONSTR_UNIQUE:
                if (cxt->isforeign)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("unique constraints are not supported on foreign tables"),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
                if (constraint->keys == NIL)
                    constraint->keys = list_make1(makeString(column->colname));
                cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
                break;
 
            case CONSTR_EXCLUSION:
                /* grammar does not allow EXCLUDE as a column constraint */
                elog(ERROR, "column exclusion constraints are not supported");
                break;
 
            case CONSTR_FOREIGN:
                if (cxt->isforeign)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("foreign key constraints are not supported on foreign tables"),
                             parser_errposition(cxt->pstate,
                                                constraint->location)));
 
                /*
                 * Fill in the current attribute's name and throw it into the
                 * list of FK constraints to be processed later.
                 */
                constraint->fk_attrs = list_make1(makeString(column->colname));
                cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
                break;
 
            case CONSTR_ATTR_DEFERRABLE:
            case CONSTR_ATTR_NOT_DEFERRABLE:
            case CONSTR_ATTR_DEFERRED:
            case CONSTR_ATTR_IMMEDIATE:
            case CONSTR_ATTR_ENFORCED:
            case CONSTR_ATTR_NOT_ENFORCED:
                /* transformConstraintAttrs took care of these */
                break;
 
            default:
                elog(ERROR, "unrecognized constraint type: %d",
                     constraint->contype);
                break;
        }
 
        if (saw_default && saw_identity)
            ereport(ERROR,
                    (errcode(ERRCODE_SYNTAX_ERROR),
                     errmsg("both default and identity specified for column \"%s\" of table \"%s\"",
                            column->colname, cxt->relation->relname),
                     parser_errposition(cxt->pstate,
                                        constraint->location)));
 
        if (saw_default && saw_generated)
            ereport(ERROR,
                    (errcode(ERRCODE_SYNTAX_ERROR),
                     errmsg("both default and generation expression specified for column \"%s\" of table \"%s\"",
                            column->colname, cxt->relation->relname),
                     parser_errposition(cxt->pstate,
                                        constraint->location)));
 
        if (saw_identity && saw_generated)
            ereport(ERROR,
                    (errcode(ERRCODE_SYNTAX_ERROR),
                     errmsg("both identity and generation expression specified for column \"%s\" of table \"%s\"",
                            column->colname, cxt->relation->relname),
                     parser_errposition(cxt->pstate,
                                        constraint->location)));
    }
 
    /*
     * If we need a not-null constraint for PRIMARY KEY, SERIAL or IDENTITY,
     * and one was not explicitly specified, add one now.
     */
    if (need_notnull && !(saw_nullable && column->is_not_null))
    {
        column->is_not_null = true;
        notnull_constraint = makeNotNullConstraint(makeString(column->colname));
        cxt->nnconstraints = lappend(cxt->nnconstraints, notnull_constraint);
    }
 
    /*
     * If needed, generate ALTER FOREIGN TABLE ALTER COLUMN statement to add
     * per-column foreign data wrapper options to this column after creation.
     */
    if (column->fdwoptions != NIL)
    {
        AlterTableStmt *stmt;
        AlterTableCmd *cmd;
 
        cmd = makeNode(AlterTableCmd);
        cmd->subtype = AT_AlterColumnGenericOptions;
        cmd->name = column->colname;
        cmd->def = (Node *) column->fdwoptions;
        cmd->behavior = DROP_RESTRICT;
        cmd->missing_ok = false;
 
        stmt = makeNode(AlterTableStmt);
        stmt->relation = cxt->relation;
        stmt->cmds = NIL;
        stmt->objtype = OBJECT_FOREIGN_TABLE;
        stmt->cmds = lappend(stmt->cmds, cmd);
 
        cxt->alist = lappend(cxt->alist, stmt);
    }
}

Referenced by transformAlterTableStmt(), and transformCreateStmt().

◆ transformColumnType()

static void transformColumnType	(	CreateStmtContext *	cxt,
		ColumnDef *	column
	)

static

Definition at line 4024 of file parse_utilcmd.c.

{
    /*
     * All we really need to do here is verify that the type is valid,
     * including any collation spec that might be present.
     */
    Type        ctype = typenameType(cxt->pstate, column->typeName, NULL);
 
    if (column->collClause)
    {
        Form_pg_type typtup = (Form_pg_type) GETSTRUCT(ctype);
 
        LookupCollation(cxt->pstate,
                        column->collClause->collname,
                        column->collClause->location);
        /* Complain if COLLATE is applied to an uncollatable type */
        if (!OidIsValid(typtup->typcollation))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("collations are not supported by type %s",
                            format_type_be(typtup->oid)),
                     parser_errposition(cxt->pstate,
                                        column->collClause->location)));
    }
 
    ReleaseSysCache(ctype);
}

References ColumnDef::collClause, CollateClause::collname, ereport, errcode(), errmsg(), ERROR, format_type_be(), GETSTRUCT(), CollateClause::location, LookupCollation(), OidIsValid, parser_errposition(), CreateStmtContext::pstate, ReleaseSysCache(), ColumnDef::typeName, and typenameType().

Referenced by transformColumnDefinition().

◆ transformConstraintAttrs()

static void transformConstraintAttrs	(	CreateStmtContext *	cxt,
		List *	constraintList
	)

static

Definition at line 3869 of file parse_utilcmd.c.

{
    Constraint *lastprimarycon = NULL;
    bool        saw_deferrability = false;
    bool        saw_initially = false;
    bool        saw_enforced = false;
    ListCell   *clist;
 
#define SUPPORTS_ATTRS(node)                \
    ((node) != NULL &&                      \
     ((node)->contype == CONSTR_PRIMARY ||  \
      (node)->contype == CONSTR_UNIQUE ||   \
      (node)->contype == CONSTR_EXCLUSION || \
      (node)->contype == CONSTR_FOREIGN))
 
    foreach(clist, constraintList)
    {
        Constraint *con = (Constraint *) lfirst(clist);
 
        if (!IsA(con, Constraint))
            elog(ERROR, "unrecognized node type: %d",
                 (int) nodeTag(con));
        switch (con->contype)
        {
            case CONSTR_ATTR_DEFERRABLE:
                if (!SUPPORTS_ATTRS(lastprimarycon))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced DEFERRABLE clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_deferrability)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_deferrability = true;
                lastprimarycon->deferrable = true;
                break;
 
            case CONSTR_ATTR_NOT_DEFERRABLE:
                if (!SUPPORTS_ATTRS(lastprimarycon))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced NOT DEFERRABLE clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_deferrability)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple DEFERRABLE/NOT DEFERRABLE clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_deferrability = true;
                lastprimarycon->deferrable = false;
                if (saw_initially &&
                    lastprimarycon->initdeferred)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
                             parser_errposition(cxt->pstate, con->location)));
                break;
 
            case CONSTR_ATTR_DEFERRED:
                if (!SUPPORTS_ATTRS(lastprimarycon))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced INITIALLY DEFERRED clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_initially)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_initially = true;
                lastprimarycon->initdeferred = true;
 
                /*
                 * If only INITIALLY DEFERRED appears, assume DEFERRABLE
                 */
                if (!saw_deferrability)
                    lastprimarycon->deferrable = true;
                else if (!lastprimarycon->deferrable)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("constraint declared INITIALLY DEFERRED must be DEFERRABLE"),
                             parser_errposition(cxt->pstate, con->location)));
                break;
 
            case CONSTR_ATTR_IMMEDIATE:
                if (!SUPPORTS_ATTRS(lastprimarycon))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced INITIALLY IMMEDIATE clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_initially)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple INITIALLY IMMEDIATE/DEFERRED clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_initially = true;
                lastprimarycon->initdeferred = false;
                break;
 
            case CONSTR_ATTR_ENFORCED:
                if (lastprimarycon == NULL ||
                    (lastprimarycon->contype != CONSTR_CHECK &&
                     lastprimarycon->contype != CONSTR_FOREIGN))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced ENFORCED clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_enforced)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_enforced = true;
                lastprimarycon->is_enforced = true;
                break;
 
            case CONSTR_ATTR_NOT_ENFORCED:
                if (lastprimarycon == NULL ||
                    (lastprimarycon->contype != CONSTR_CHECK &&
                     lastprimarycon->contype != CONSTR_FOREIGN))
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("misplaced NOT ENFORCED clause"),
                             parser_errposition(cxt->pstate, con->location)));
                if (saw_enforced)
                    ereport(ERROR,
                            (errcode(ERRCODE_SYNTAX_ERROR),
                             errmsg("multiple ENFORCED/NOT ENFORCED clauses not allowed"),
                             parser_errposition(cxt->pstate, con->location)));
                saw_enforced = true;
                lastprimarycon->is_enforced = false;
 
                /* A NOT ENFORCED constraint must be marked as invalid. */
                lastprimarycon->skip_validation = true;
                lastprimarycon->initially_valid = false;
                break;
 
            default:
                /* Otherwise it's not an attribute */
                lastprimarycon = con;
                /* reset flags for new primary node */
                saw_deferrability = false;
                saw_initially = false;
                saw_enforced = false;
                break;
        }
    }
}

References CONSTR_ATTR_DEFERRABLE, CONSTR_ATTR_DEFERRED, CONSTR_ATTR_ENFORCED, CONSTR_ATTR_IMMEDIATE, CONSTR_ATTR_NOT_DEFERRABLE, CONSTR_ATTR_NOT_ENFORCED, CONSTR_CHECK, CONSTR_FOREIGN, Constraint::contype, Constraint::deferrable, elog, ereport, errcode(), errmsg(), ERROR, Constraint::initdeferred, Constraint::initially_valid, Constraint::is_enforced, IsA, lfirst, Constraint::location, nodeTag, parser_errposition(), CreateStmtContext::pstate, Constraint::skip_validation, and SUPPORTS_ATTRS.

Referenced by transformColumnDefinition().

◆ transformCreateSchemaStmtElements()

List * transformCreateSchemaStmtElements	(	List *	schemaElts,
		const char *	schemaName
	)

Definition at line 4081 of file parse_utilcmd.c.

{
    CreateSchemaStmtContext cxt;
    List       *result;
    ListCell   *elements;
 
    cxt.schemaname = schemaName;
    cxt.sequences = NIL;
    cxt.tables = NIL;
    cxt.views = NIL;
    cxt.indexes = NIL;
    cxt.triggers = NIL;
    cxt.grants = NIL;
 
    /*
     * Run through each schema element in the schema element list. Separate
     * statements by type, and do preliminary analysis.
     */
    foreach(elements, schemaElts)
    {
        Node       *element = lfirst(elements);
 
        switch (nodeTag(element))
        {
            case T_CreateSeqStmt:
                {
                    CreateSeqStmt *elp = (CreateSeqStmt *) element;
 
                    setSchemaName(cxt.schemaname, &elp->sequence->schemaname);
                    cxt.sequences = lappend(cxt.sequences, element);
                }
                break;
 
            case T_CreateStmt:
                {
                    CreateStmt *elp = (CreateStmt *) element;
 
                    setSchemaName(cxt.schemaname, &elp->relation->schemaname);
 
                    /*
                     * XXX todo: deal with constraints
                     */
                    cxt.tables = lappend(cxt.tables, element);
                }
                break;
 
            case T_ViewStmt:
                {
                    ViewStmt   *elp = (ViewStmt *) element;
 
                    setSchemaName(cxt.schemaname, &elp->view->schemaname);
 
                    /*
                     * XXX todo: deal with references between views
                     */
                    cxt.views = lappend(cxt.views, element);
                }
                break;
 
            case T_IndexStmt:
                {
                    IndexStmt  *elp = (IndexStmt *) element;
 
                    setSchemaName(cxt.schemaname, &elp->relation->schemaname);
                    cxt.indexes = lappend(cxt.indexes, element);
                }
                break;
 
            case T_CreateTrigStmt:
                {
                    CreateTrigStmt *elp = (CreateTrigStmt *) element;
 
                    setSchemaName(cxt.schemaname, &elp->relation->schemaname);
                    cxt.triggers = lappend(cxt.triggers, element);
                }
                break;
 
            case T_GrantStmt:
                cxt.grants = lappend(cxt.grants, element);
                break;
 
            default:
                elog(ERROR, "unrecognized node type: %d",
                     (int) nodeTag(element));
        }
    }
 
    result = NIL;
    result = list_concat(result, cxt.sequences);
    result = list_concat(result, cxt.tables);
    result = list_concat(result, cxt.views);
    result = list_concat(result, cxt.indexes);
    result = list_concat(result, cxt.triggers);
    result = list_concat(result, cxt.grants);
 
    return result;
}

References element(), elog, ERROR, CreateSchemaStmtContext::grants, CreateSchemaStmtContext::indexes, lappend(), lfirst, list_concat(), NIL, nodeTag, CreateStmt::relation, CreateTrigStmt::relation, IndexStmt::relation, CreateSchemaStmtContext::schemaname, RangeVar::schemaname, CreateSeqStmt::sequence, CreateSchemaStmtContext::sequences, setSchemaName(), CreateSchemaStmtContext::tables, CreateSchemaStmtContext::triggers, ViewStmt::view, and CreateSchemaStmtContext::views.

Referenced by CreateSchemaCommand().

◆ transformCreateStmt()

List * transformCreateStmt	(	CreateStmt *	stmt,
		const char *	queryString
	)

Definition at line 164 of file parse_utilcmd.c.

{
    ParseState *pstate;
    CreateStmtContext cxt;
    List       *result;
    List       *save_alist;
    ListCell   *elements;
    Oid         namespaceid;
    Oid         existing_relid;
    ParseCallbackState pcbstate;
 
    /* Set up pstate */
    pstate = make_parsestate(NULL);
    pstate->p_sourcetext = queryString;
 
    /*
     * Look up the creation namespace.  This also checks permissions on the
     * target namespace, locks it against concurrent drops, checks for a
     * preexisting relation in that namespace with the same name, and updates
     * stmt->relation->relpersistence if the selected namespace is temporary.
     */
    setup_parser_errposition_callback(&pcbstate, pstate,
                                      stmt->relation->location);
    namespaceid =
        RangeVarGetAndCheckCreationNamespace(stmt->relation, NoLock,
                                             &existing_relid);
    cancel_parser_errposition_callback(&pcbstate);
 
    /*
     * If the relation already exists and the user specified "IF NOT EXISTS",
     * bail out with a NOTICE.
     */
    if (stmt->if_not_exists && OidIsValid(existing_relid))
    {
        /*
         * If we are in an extension script, insist that the pre-existing
         * object be a member of the extension, to avoid security risks.
         */
        ObjectAddress address;
 
        ObjectAddressSet(address, RelationRelationId, existing_relid);
        checkMembershipInCurrentExtension(&address);
 
        /* OK to skip */
        ereport(NOTICE,
                (errcode(ERRCODE_DUPLICATE_TABLE),
                 errmsg("relation \"%s\" already exists, skipping",
                        stmt->relation->relname)));
        return NIL;
    }
 
    /*
     * If the target relation name isn't schema-qualified, make it so.  This
     * prevents some corner cases in which added-on rewritten commands might
     * think they should apply to other relations that have the same name and
     * are earlier in the search path.  But a local temp table is effectively
     * specified to be in pg_temp, so no need for anything extra in that case.
     */
    if (stmt->relation->schemaname == NULL
        && stmt->relation->relpersistence != RELPERSISTENCE_TEMP)
        stmt->relation->schemaname = get_namespace_name(namespaceid);
 
    /* Set up CreateStmtContext */
    cxt.pstate = pstate;
    if (IsA(stmt, CreateForeignTableStmt))
    {
        cxt.stmtType = "CREATE FOREIGN TABLE";
        cxt.isforeign = true;
    }
    else
    {
        cxt.stmtType = "CREATE TABLE";
        cxt.isforeign = false;
    }
    cxt.relation = stmt->relation;
    cxt.rel = NULL;
    cxt.inhRelations = stmt->inhRelations;
    cxt.isalter = false;
    cxt.columns = NIL;
    cxt.ckconstraints = NIL;
    cxt.nnconstraints = NIL;
    cxt.fkconstraints = NIL;
    cxt.ixconstraints = NIL;
    cxt.likeclauses = NIL;
    cxt.blist = NIL;
    cxt.alist = NIL;
    cxt.pkey = NULL;
    cxt.ispartitioned = stmt->partspec != NULL;
    cxt.partbound = stmt->partbound;
    cxt.ofType = (stmt->ofTypename != NULL);
 
    Assert(!stmt->ofTypename || !stmt->inhRelations);   /* grammar enforces */
 
    if (stmt->ofTypename)
        transformOfType(&cxt, stmt->ofTypename);
 
    if (stmt->partspec)
    {
        if (stmt->inhRelations && !stmt->partbound)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                     errmsg("cannot create partitioned table as inheritance child")));
    }
 
    /*
     * Run through each primary element in the table creation clause. Separate
     * column defs from constraints, and do preliminary analysis.
     */
    foreach(elements, stmt->tableElts)
    {
        Node       *element = lfirst(elements);
 
        switch (nodeTag(element))
        {
            case T_ColumnDef:
                transformColumnDefinition(&cxt, (ColumnDef *) element);
                break;
 
            case T_Constraint:
                transformTableConstraint(&cxt, (Constraint *) element);
                break;
 
            case T_TableLikeClause:
                transformTableLikeClause(&cxt, (TableLikeClause *) element);
                break;
 
            default:
                elog(ERROR, "unrecognized node type: %d",
                     (int) nodeTag(element));
                break;
        }
    }
 
    /*
     * Transfer anything we already have in cxt.alist into save_alist, to keep
     * it separate from the output of transformIndexConstraints.  (This may
     * not be necessary anymore, but we'll keep doing it to preserve the
     * historical order of execution of the alist commands.)
     */
    save_alist = cxt.alist;
    cxt.alist = NIL;
 
    Assert(stmt->constraints == NIL);
 
    /*
     * Before processing index constraints, which could include a primary key,
     * we must scan all not-null constraints to propagate the is_not_null flag
     * to each corresponding ColumnDef.  This is necessary because table-level
     * not-null constraints have not been marked in each ColumnDef, and the PK
     * processing code needs to know whether one constraint has already been
     * declared in order not to declare a redundant one.
     */
    foreach_node(Constraint, nn, cxt.nnconstraints)
    {
        char       *colname = strVal(linitial(nn->keys));
 
        foreach_node(ColumnDef, cd, cxt.columns)
        {
            /* not our column? */
            if (strcmp(cd->colname, colname) != 0)
                continue;
            /* Already marked not-null? Nothing to do */
            if (cd->is_not_null)
                break;
            /* Bingo, we're done for this constraint */
            cd->is_not_null = true;
            break;
        }
    }
 
    /*
     * Postprocess constraints that give rise to index definitions.
     */
    transformIndexConstraints(&cxt);
 
    /*
     * Re-consideration of LIKE clauses should happen after creation of
     * indexes, but before creation of foreign keys.  This order is critical
     * because a LIKE clause may attempt to create a primary key.  If there's
     * also a pkey in the main CREATE TABLE list, creation of that will not
     * check for a duplicate at runtime (since index_check_primary_key()
     * expects that we rejected dups here).  Creation of the LIKE-generated
     * pkey behaves like ALTER TABLE ADD, so it will check, but obviously that
     * only works if it happens second.  On the other hand, we want to make
     * pkeys before foreign key constraints, in case the user tries to make a
     * self-referential FK.
     */
    cxt.alist = list_concat(cxt.alist, cxt.likeclauses);
 
    /*
     * Postprocess foreign-key constraints.
     */
    transformFKConstraints(&cxt, true, false);
 
    /*
     * Postprocess check constraints.
     *
     * For regular tables all constraints can be marked valid immediately,
     * because the table is new therefore empty. Not so for foreign tables.
     */
    transformCheckConstraints(&cxt, !cxt.isforeign);
 
    /*
     * Output results.
     */
    stmt->tableElts = cxt.columns;
    stmt->constraints = cxt.ckconstraints;
    stmt->nnconstraints = cxt.nnconstraints;
 
    result = lappend(cxt.blist, stmt);
    result = list_concat(result, cxt.alist);
    result = list_concat(result, save_alist);
 
    return result;
}

Referenced by ProcessUtilitySlow().

◆ transformFKConstraints()

static void transformFKConstraints	(	CreateStmtContext *	cxt,
		bool	skipValidation,
		bool	isAddConstraint
	)

static

Definition at line 2955 of file parse_utilcmd.c.

{
    ListCell   *fkclist;
 
    if (cxt->fkconstraints == NIL)
        return;
 
    /*
     * If CREATE TABLE or adding a column with NULL default, we can safely
     * skip validation of FK constraints, and mark them as valid based on the
     * constraint enforcement flag, since NOT ENFORCED constraints must always
     * be marked as NOT VALID. (This will override any user-supplied NOT VALID
     * flag.)
     */
    if (skipValidation)
    {
        foreach(fkclist, cxt->fkconstraints)
        {
            Constraint *constraint = (Constraint *) lfirst(fkclist);
 
            constraint->skip_validation = true;
            constraint->initially_valid = constraint->is_enforced;
        }
    }
 
    /*
     * For CREATE TABLE or ALTER TABLE ADD COLUMN, gin up an ALTER TABLE ADD
     * CONSTRAINT command to execute after the basic command is complete. (If
     * called from ADD CONSTRAINT, that routine will add the FK constraints to
     * its own subcommand list.)
     *
     * Note: the ADD CONSTRAINT command must also execute after any index
     * creation commands.  Thus, this should run after
     * transformIndexConstraints, so that the CREATE INDEX commands are
     * already in cxt->alist.  See also the handling of cxt->likeclauses.
     */
    if (!isAddConstraint)
    {
        AlterTableStmt *alterstmt = makeNode(AlterTableStmt);
 
        alterstmt->relation = cxt->relation;
        alterstmt->cmds = NIL;
        alterstmt->objtype = OBJECT_TABLE;
 
        foreach(fkclist, cxt->fkconstraints)
        {
            Constraint *constraint = (Constraint *) lfirst(fkclist);
            AlterTableCmd *altercmd = makeNode(AlterTableCmd);
 
            altercmd->subtype = AT_AddConstraint;
            altercmd->name = NULL;
            altercmd->def = (Node *) constraint;
            alterstmt->cmds = lappend(alterstmt->cmds, altercmd);
        }
 
        cxt->alist = lappend(cxt->alist, alterstmt);
    }
}

References CreateStmtContext::alist, AT_AddConstraint, AlterTableStmt::cmds, AlterTableCmd::def, CreateStmtContext::fkconstraints, Constraint::initially_valid, Constraint::is_enforced, lappend(), lfirst, makeNode, AlterTableCmd::name, NIL, OBJECT_TABLE, AlterTableStmt::objtype, CreateStmtContext::relation, AlterTableStmt::relation, Constraint::skip_validation, and AlterTableCmd::subtype.

Referenced by transformAlterTableStmt(), and transformCreateStmt().

◆ transformIndexConstraint()

static IndexStmt * transformIndexConstraint	(	Constraint *	constraint,
		CreateStmtContext *	cxt
	)

static

Definition at line 2317 of file parse_utilcmd.c.

{
    IndexStmt  *index;
    ListCell   *lc;
 
    index = makeNode(IndexStmt);
 
    index->unique = (constraint->contype != CONSTR_EXCLUSION);
    index->primary = (constraint->contype == CONSTR_PRIMARY);
    if (index->primary)
    {
        if (cxt->pkey != NULL)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("multiple primary keys for table \"%s\" are not allowed",
                            cxt->relation->relname),
                     parser_errposition(cxt->pstate, constraint->location)));
        cxt->pkey = index;
 
        /*
         * In ALTER TABLE case, a primary index might already exist, but
         * DefineIndex will check for it.
         */
    }
    index->nulls_not_distinct = constraint->nulls_not_distinct;
    index->isconstraint = true;
    index->iswithoutoverlaps = constraint->without_overlaps;
    index->deferrable = constraint->deferrable;
    index->initdeferred = constraint->initdeferred;
 
    if (constraint->conname != NULL)
        index->idxname = pstrdup(constraint->conname);
    else
        index->idxname = NULL;  /* DefineIndex will choose name */
 
    index->relation = cxt->relation;
    index->accessMethod = constraint->access_method ? constraint->access_method : DEFAULT_INDEX_TYPE;
    index->options = constraint->options;
    index->tableSpace = constraint->indexspace;
    index->whereClause = constraint->where_clause;
    index->indexParams = NIL;
    index->indexIncludingParams = NIL;
    index->excludeOpNames = NIL;
    index->idxcomment = NULL;
    index->indexOid = InvalidOid;
    index->oldNumber = InvalidRelFileNumber;
    index->oldCreateSubid = InvalidSubTransactionId;
    index->oldFirstRelfilelocatorSubid = InvalidSubTransactionId;
    index->transformed = false;
    index->concurrent = false;
    index->if_not_exists = false;
    index->reset_default_tblspc = constraint->reset_default_tblspc;
 
    /*
     * If it's ALTER TABLE ADD CONSTRAINT USING INDEX, look up the index and
     * verify it's usable, then extract the implied column name list.  (We
     * will not actually need the column name list at runtime, but we need it
     * now to check for duplicate column entries below.)
     */
    if (constraint->indexname != NULL)
    {
        char       *index_name = constraint->indexname;
        Relation    heap_rel = cxt->rel;
        Oid         index_oid;
        Relation    index_rel;
        Form_pg_index index_form;
        oidvector  *indclass;
        Datum       indclassDatum;
        int         i;
 
        /* Grammar should not allow this with explicit column list */
        Assert(constraint->keys == NIL);
 
        /* Grammar should only allow PRIMARY and UNIQUE constraints */
        Assert(constraint->contype == CONSTR_PRIMARY ||
               constraint->contype == CONSTR_UNIQUE);
 
        /* Must be ALTER, not CREATE, but grammar doesn't enforce that */
        if (!cxt->isalter)
            ereport(ERROR,
                    (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                     errmsg("cannot use an existing index in CREATE TABLE"),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /* Look for the index in the same schema as the table */
        index_oid = get_relname_relid(index_name, RelationGetNamespace(heap_rel));
 
        if (!OidIsValid(index_oid))
            ereport(ERROR,
                    (errcode(ERRCODE_UNDEFINED_OBJECT),
                     errmsg("index \"%s\" does not exist", index_name),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /* Open the index (this will throw an error if it is not an index) */
        index_rel = index_open(index_oid, AccessShareLock);
        index_form = index_rel->rd_index;
 
        /* Check that it does not have an associated constraint already */
        if (OidIsValid(get_index_constraint(index_oid)))
            ereport(ERROR,
                    (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                     errmsg("index \"%s\" is already associated with a constraint",
                            index_name),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /* Perform validity checks on the index */
        if (index_form->indrelid != RelationGetRelid(heap_rel))
            ereport(ERROR,
                    (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                     errmsg("index \"%s\" does not belong to table \"%s\"",
                            index_name, RelationGetRelationName(heap_rel)),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        if (!index_form->indisvalid)
            ereport(ERROR,
                    (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                     errmsg("index \"%s\" is not valid", index_name),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /*
         * Today we forbid non-unique indexes, but we could permit GiST
         * indexes whose last entry is a range type and use that to create a
         * WITHOUT OVERLAPS constraint (i.e. a temporal constraint).
         */
        if (!index_form->indisunique)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("\"%s\" is not a unique index", index_name),
                     errdetail("Cannot create a primary key or unique constraint using such an index."),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        if (RelationGetIndexExpressions(index_rel) != NIL)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("index \"%s\" contains expressions", index_name),
                     errdetail("Cannot create a primary key or unique constraint using such an index."),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        if (RelationGetIndexPredicate(index_rel) != NIL)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("\"%s\" is a partial index", index_name),
                     errdetail("Cannot create a primary key or unique constraint using such an index."),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /*
         * It's probably unsafe to change a deferred index to non-deferred. (A
         * non-constraint index couldn't be deferred anyway, so this case
         * should never occur; no need to sweat, but let's check it.)
         */
        if (!index_form->indimmediate && !constraint->deferrable)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("\"%s\" is a deferrable index", index_name),
                     errdetail("Cannot create a non-deferrable constraint using a deferrable index."),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /*
         * Insist on it being a btree.  We must have an index that exactly
         * matches what you'd get from plain ADD CONSTRAINT syntax, else dump
         * and reload will produce a different index (breaking pg_upgrade in
         * particular).
         */
        if (index_rel->rd_rel->relam != get_index_am_oid(DEFAULT_INDEX_TYPE, false))
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("index \"%s\" is not a btree", index_name),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /* Must get indclass the hard way */
        indclassDatum = SysCacheGetAttrNotNull(INDEXRELID,
                                               index_rel->rd_indextuple,
                                               Anum_pg_index_indclass);
        indclass = (oidvector *) DatumGetPointer(indclassDatum);
 
        for (i = 0; i < index_form->indnatts; i++)
        {
            int16       attnum = index_form->indkey.values[i];
            const FormData_pg_attribute *attform;
            char       *attname;
            Oid         defopclass;
 
            /*
             * We shouldn't see attnum == 0 here, since we already rejected
             * expression indexes.  If we do, SystemAttributeDefinition will
             * throw an error.
             */
            if (attnum > 0)
            {
                Assert(attnum <= heap_rel->rd_att->natts);
                attform = TupleDescAttr(heap_rel->rd_att, attnum - 1);
            }
            else
                attform = SystemAttributeDefinition(attnum);
            attname = pstrdup(NameStr(attform->attname));
 
            if (i < index_form->indnkeyatts)
            {
                /*
                 * Insist on default opclass, collation, and sort options.
                 * While the index would still work as a constraint with
                 * non-default settings, it might not provide exactly the same
                 * uniqueness semantics as you'd get from a normally-created
                 * constraint; and there's also the dump/reload problem
                 * mentioned above.
                 */
                Datum       attoptions =
                    get_attoptions(RelationGetRelid(index_rel), i + 1);
 
                defopclass = GetDefaultOpClass(attform->atttypid,
                                               index_rel->rd_rel->relam);
                if (indclass->values[i] != defopclass ||
                    attform->attcollation != index_rel->rd_indcollation[i] ||
                    attoptions != (Datum) 0 ||
                    index_rel->rd_indoption[i] != 0)
                    ereport(ERROR,
                            (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                             errmsg("index \"%s\" column number %d does not have default sorting behavior", index_name, i + 1),
                             errdetail("Cannot create a primary key or unique constraint using such an index."),
                             parser_errposition(cxt->pstate, constraint->location)));
 
                /* If a PK, ensure the columns get not null constraints */
                if (constraint->contype == CONSTR_PRIMARY)
                    cxt->nnconstraints =
                        lappend(cxt->nnconstraints,
                                makeNotNullConstraint(makeString(attname)));
 
                constraint->keys = lappend(constraint->keys, makeString(attname));
            }
            else
                constraint->including = lappend(constraint->including, makeString(attname));
        }
 
        /* Close the index relation but keep the lock */
        relation_close(index_rel, NoLock);
 
        index->indexOid = index_oid;
    }
 
    /*
     * If it's an EXCLUDE constraint, the grammar returns a list of pairs of
     * IndexElems and operator names.  We have to break that apart into
     * separate lists.
     */
    if (constraint->contype == CONSTR_EXCLUSION)
    {
        foreach(lc, constraint->exclusions)
        {
            List       *pair = (List *) lfirst(lc);
            IndexElem  *elem;
            List       *opname;
 
            Assert(list_length(pair) == 2);
            elem = linitial_node(IndexElem, pair);
            opname = lsecond_node(List, pair);
 
            index->indexParams = lappend(index->indexParams, elem);
            index->excludeOpNames = lappend(index->excludeOpNames, opname);
        }
    }
 
    /*
     * For UNIQUE and PRIMARY KEY, we just have a list of column names.
     *
     * Make sure referenced keys exist.  If we are making a PRIMARY KEY index,
     * also make sure they are not-null.  For WITHOUT OVERLAPS constraints, we
     * make sure the last part is a range or multirange.
     */
    else
    {
        foreach(lc, constraint->keys)
        {
            char       *key = strVal(lfirst(lc));
            bool        found = false;
            ColumnDef  *column = NULL;
            ListCell   *columns;
            IndexElem  *iparam;
            Oid         typid = InvalidOid;
 
            /* Make sure referenced column exists. */
            foreach(columns, cxt->columns)
            {
                column = lfirst_node(ColumnDef, columns);
                if (strcmp(column->colname, key) == 0)
                {
                    found = true;
                    break;
                }
            }
            if (!found)
                column = NULL;
 
            if (found)
            {
                /*
                 * column is defined in the new table.  For CREATE TABLE with
                 * a PRIMARY KEY, we can apply the not-null constraint cheaply
                 * here.  If the not-null constraint already exists, we can
                 * (albeit not so cheaply) verify that it's not a NO INHERIT
                 * constraint.
                 *
                 * Note that ALTER TABLE never needs either check, because
                 * those constraints have already been added by
                 * ATPrepAddPrimaryKey.
                 */
                if (constraint->contype == CONSTR_PRIMARY &&
                    !cxt->isalter)
                {
                    if (column->is_not_null)
                    {
                        foreach_node(Constraint, nn, cxt->nnconstraints)
                        {
                            if (strcmp(strVal(linitial(nn->keys)), key) == 0)
                            {
                                if (nn->is_no_inherit)
                                    ereport(ERROR,
                                            errcode(ERRCODE_SYNTAX_ERROR),
                                            errmsg("conflicting NO INHERIT declaration for not-null constraint on column \"%s\"",
                                                   key));
                                break;
                            }
                        }
                    }
                    else
                    {
                        column->is_not_null = true;
                        cxt->nnconstraints =
                            lappend(cxt->nnconstraints,
                                    makeNotNullConstraint(makeString(key)));
                    }
                }
                else if (constraint->contype == CONSTR_PRIMARY)
                    Assert(column->is_not_null);
            }
            else if (SystemAttributeByName(key) != NULL)
            {
                /*
                 * column will be a system column in the new table, so accept
                 * it. System columns can't ever be null, so no need to worry
                 * about PRIMARY/NOT NULL constraint.
                 */
                found = true;
            }
            else if (cxt->inhRelations)
            {
                /* try inherited tables */
                ListCell   *inher;
 
                foreach(inher, cxt->inhRelations)
                {
                    RangeVar   *inh = lfirst_node(RangeVar, inher);
                    Relation    rel;
                    int         count;
 
                    rel = table_openrv(inh, AccessShareLock);
                    /* check user requested inheritance from valid relkind */
                    if (rel->rd_rel->relkind != RELKIND_RELATION &&
                        rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
                        rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
                        ereport(ERROR,
                                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                                 errmsg("inherited relation \"%s\" is not a table or foreign table",
                                        inh->relname)));
                    for (count = 0; count < rel->rd_att->natts; count++)
                    {
                        Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
                                                                  count);
                        char       *inhname = NameStr(inhattr->attname);
 
                        if (inhattr->attisdropped)
                            continue;
                        if (strcmp(key, inhname) == 0)
                        {
                            found = true;
                            typid = inhattr->atttypid;
 
                            if (constraint->contype == CONSTR_PRIMARY)
                                cxt->nnconstraints =
                                    lappend(cxt->nnconstraints,
                                            makeNotNullConstraint(makeString(pstrdup(inhname))));
                            break;
                        }
                    }
                    table_close(rel, NoLock);
                    if (found)
                        break;
                }
            }
 
            /*
             * In the ALTER TABLE case, don't complain about index keys not
             * created in the command; they may well exist already.
             * DefineIndex will complain about them if not.
             */
            if (!found && !cxt->isalter)
                ereport(ERROR,
                        (errcode(ERRCODE_UNDEFINED_COLUMN),
                         errmsg("column \"%s\" named in key does not exist", key),
                         parser_errposition(cxt->pstate, constraint->location)));
 
            /* Check for PRIMARY KEY(foo, foo) */
            foreach(columns, index->indexParams)
            {
                iparam = (IndexElem *) lfirst(columns);
                if (iparam->name && strcmp(key, iparam->name) == 0)
                {
                    if (index->primary)
                        ereport(ERROR,
                                (errcode(ERRCODE_DUPLICATE_COLUMN),
                                 errmsg("column \"%s\" appears twice in primary key constraint",
                                        key),
                                 parser_errposition(cxt->pstate, constraint->location)));
                    else
                        ereport(ERROR,
                                (errcode(ERRCODE_DUPLICATE_COLUMN),
                                 errmsg("column \"%s\" appears twice in unique constraint",
                                        key),
                                 parser_errposition(cxt->pstate, constraint->location)));
                }
            }
 
            /*
             * The WITHOUT OVERLAPS part (if any) must be a range or
             * multirange type.
             */
            if (constraint->without_overlaps && lc == list_last_cell(constraint->keys))
            {
                if (!found && cxt->isalter)
                {
                    /*
                     * Look up the column type on existing table. If we can't
                     * find it, let things fail in DefineIndex.
                     */
                    Relation    rel = cxt->rel;
 
                    for (int i = 0; i < rel->rd_att->natts; i++)
                    {
                        Form_pg_attribute attr = TupleDescAttr(rel->rd_att, i);
                        const char *attname;
 
                        if (attr->attisdropped)
                            break;
 
                        attname = NameStr(attr->attname);
                        if (strcmp(attname, key) == 0)
                        {
                            found = true;
                            typid = attr->atttypid;
                            break;
                        }
                    }
                }
                if (found)
                {
                    if (!OidIsValid(typid) && column)
                        typid = typenameTypeId(NULL, column->typeName);
 
                    if (!OidIsValid(typid) || !(type_is_range(typid) || type_is_multirange(typid)))
                        ereport(ERROR,
                                (errcode(ERRCODE_DATATYPE_MISMATCH),
                                 errmsg("column \"%s\" in WITHOUT OVERLAPS is not a range or multirange type", key),
                                 parser_errposition(cxt->pstate, constraint->location)));
                }
            }
 
            /* OK, add it to the index definition */
            iparam = makeNode(IndexElem);
            iparam->name = pstrdup(key);
            iparam->expr = NULL;
            iparam->indexcolname = NULL;
            iparam->collation = NIL;
            iparam->opclass = NIL;
            iparam->opclassopts = NIL;
            iparam->ordering = SORTBY_DEFAULT;
            iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
            index->indexParams = lappend(index->indexParams, iparam);
        }
 
        if (constraint->without_overlaps)
        {
            /*
             * This enforces that there is at least one equality column
             * besides the WITHOUT OVERLAPS columns.  This is per SQL
             * standard.  XXX Do we need this?
             */
            if (list_length(constraint->keys) < 2)
                ereport(ERROR,
                        errcode(ERRCODE_SYNTAX_ERROR),
                        errmsg("constraint using WITHOUT OVERLAPS needs at least two columns"));
 
            /* WITHOUT OVERLAPS requires a GiST index */
            index->accessMethod = "gist";
        }
 
    }
 
    /*
     * Add included columns to index definition.  This is much like the
     * simple-column-name-list code above, except that we don't worry about
     * NOT NULL marking; included columns in a primary key should not be
     * forced NOT NULL.  We don't complain about duplicate columns, either,
     * though maybe we should?
     */
    foreach(lc, constraint->including)
    {
        char       *key = strVal(lfirst(lc));
        bool        found = false;
        ColumnDef  *column = NULL;
        ListCell   *columns;
        IndexElem  *iparam;
 
        foreach(columns, cxt->columns)
        {
            column = lfirst_node(ColumnDef, columns);
            if (strcmp(column->colname, key) == 0)
            {
                found = true;
                break;
            }
        }
 
        if (!found)
        {
            if (SystemAttributeByName(key) != NULL)
            {
                /*
                 * column will be a system column in the new table, so accept
                 * it.
                 */
                found = true;
            }
            else if (cxt->inhRelations)
            {
                /* try inherited tables */
                ListCell   *inher;
 
                foreach(inher, cxt->inhRelations)
                {
                    RangeVar   *inh = lfirst_node(RangeVar, inher);
                    Relation    rel;
                    int         count;
 
                    rel = table_openrv(inh, AccessShareLock);
                    /* check user requested inheritance from valid relkind */
                    if (rel->rd_rel->relkind != RELKIND_RELATION &&
                        rel->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
                        rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
                        ereport(ERROR,
                                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                                 errmsg("inherited relation \"%s\" is not a table or foreign table",
                                        inh->relname)));
                    for (count = 0; count < rel->rd_att->natts; count++)
                    {
                        Form_pg_attribute inhattr = TupleDescAttr(rel->rd_att,
                                                                  count);
                        char       *inhname = NameStr(inhattr->attname);
 
                        if (inhattr->attisdropped)
                            continue;
                        if (strcmp(key, inhname) == 0)
                        {
                            found = true;
                            break;
                        }
                    }
                    table_close(rel, NoLock);
                    if (found)
                        break;
                }
            }
        }
 
        /*
         * In the ALTER TABLE case, don't complain about index keys not
         * created in the command; they may well exist already. DefineIndex
         * will complain about them if not.
         */
        if (!found && !cxt->isalter)
            ereport(ERROR,
                    (errcode(ERRCODE_UNDEFINED_COLUMN),
                     errmsg("column \"%s\" named in key does not exist", key),
                     parser_errposition(cxt->pstate, constraint->location)));
 
        /* OK, add it to the index definition */
        iparam = makeNode(IndexElem);
        iparam->name = pstrdup(key);
        iparam->expr = NULL;
        iparam->indexcolname = NULL;
        iparam->collation = NIL;
        iparam->opclass = NIL;
        iparam->opclassopts = NIL;
        index->indexIncludingParams = lappend(index->indexIncludingParams, iparam);
    }
 
    return index;
}

Referenced by transformIndexConstraints().

◆ transformIndexConstraints()

static void transformIndexConstraints ( CreateStmtContext * cxt )

static

Definition at line 2218 of file parse_utilcmd.c.

{
    IndexStmt  *index;
    List       *indexlist = NIL;
    List       *finalindexlist = NIL;
    ListCell   *lc;
 
    /*
     * Run through the constraints that need to generate an index, and do so.
     *
     * For PRIMARY KEY, this queues not-null constraints for each column, if
     * needed.
     */
    foreach(lc, cxt->ixconstraints)
    {
        Constraint *constraint = lfirst_node(Constraint, lc);
 
        Assert(constraint->contype == CONSTR_PRIMARY ||
               constraint->contype == CONSTR_UNIQUE ||
               constraint->contype == CONSTR_EXCLUSION);
 
        index = transformIndexConstraint(constraint, cxt);
 
        indexlist = lappend(indexlist, index);
    }
 
    /*
     * Scan the index list and remove any redundant index specifications. This
     * can happen if, for instance, the user writes UNIQUE PRIMARY KEY. A
     * strict reading of SQL would suggest raising an error instead, but that
     * strikes me as too anal-retentive. - tgl 2001-02-14
     *
     * XXX in ALTER TABLE case, it'd be nice to look for duplicate
     * pre-existing indexes, too.
     */
    if (cxt->pkey != NULL)
    {
        /* Make sure we keep the PKEY index in preference to others... */
        finalindexlist = list_make1(cxt->pkey);
    }
 
    foreach(lc, indexlist)
    {
        bool        keep = true;
        ListCell   *k;
 
        index = lfirst(lc);
 
        /* if it's pkey, it's already in finalindexlist */
        if (index == cxt->pkey)
            continue;
 
        foreach(k, finalindexlist)
        {
            IndexStmt  *priorindex = lfirst(k);
 
            if (equal(index->indexParams, priorindex->indexParams) &&
                equal(index->indexIncludingParams, priorindex->indexIncludingParams) &&
                equal(index->whereClause, priorindex->whereClause) &&
                equal(index->excludeOpNames, priorindex->excludeOpNames) &&
                strcmp(index->accessMethod, priorindex->accessMethod) == 0 &&
                index->nulls_not_distinct == priorindex->nulls_not_distinct &&
                index->deferrable == priorindex->deferrable &&
                index->initdeferred == priorindex->initdeferred)
            {
                priorindex->unique |= index->unique;
 
                /*
                 * If the prior index is as yet unnamed, and this one is
                 * named, then transfer the name to the prior index. This
                 * ensures that if we have named and unnamed constraints,
                 * we'll use (at least one of) the names for the index.
                 */
                if (priorindex->idxname == NULL)
                    priorindex->idxname = index->idxname;
                keep = false;
                break;
            }
        }
 
        if (keep)
            finalindexlist = lappend(finalindexlist, index);
    }
 
    /*
     * Now append all the IndexStmts to cxt->alist.
     */
    cxt->alist = list_concat(cxt->alist, finalindexlist);
}

References IndexStmt::accessMethod, CreateStmtContext::alist, Assert(), CONSTR_EXCLUSION, CONSTR_PRIMARY, CONSTR_UNIQUE, Constraint::contype, IndexStmt::deferrable, equal(), IndexStmt::excludeOpNames, IndexStmt::idxname, IndexStmt::indexIncludingParams, IndexStmt::indexParams, IndexStmt::initdeferred, CreateStmtContext::ixconstraints, lappend(), lfirst, lfirst_node, list_concat(), list_make1, NIL, IndexStmt::nulls_not_distinct, CreateStmtContext::pkey, transformIndexConstraint(), IndexStmt::unique, and IndexStmt::whereClause.

Referenced by transformAlterTableStmt(), and transformCreateStmt().

◆ transformIndexStmt()

IndexStmt * transformIndexStmt	(	Oid	relid,
		IndexStmt *	stmt,
		const char *	queryString
	)

Definition at line 3028 of file parse_utilcmd.c.

{
    ParseState *pstate;
    ParseNamespaceItem *nsitem;
    ListCell   *l;
    Relation    rel;
 
    /* Nothing to do if statement already transformed. */
    if (stmt->transformed)
        return stmt;
 
    /* Set up pstate */
    pstate = make_parsestate(NULL);
    pstate->p_sourcetext = queryString;
 
    /*
     * Put the parent table into the rtable so that the expressions can refer
     * to its fields without qualification.  Caller is responsible for locking
     * relation, but we still need to open it.
     */
    rel = relation_open(relid, NoLock);
    nsitem = addRangeTableEntryForRelation(pstate, rel,
                                           AccessShareLock,
                                           NULL, false, true);
 
    /* no to join list, yes to namespaces */
    addNSItemToQuery(pstate, nsitem, false, true, true);
 
    /* take care of the where clause */
    if (stmt->whereClause)
    {
        stmt->whereClause = transformWhereClause(pstate,
                                                 stmt->whereClause,
                                                 EXPR_KIND_INDEX_PREDICATE,
                                                 "WHERE");
        /* we have to fix its collations too */
        assign_expr_collations(pstate, stmt->whereClause);
    }
 
    /* take care of any index expressions */
    foreach(l, stmt->indexParams)
    {
        IndexElem  *ielem = (IndexElem *) lfirst(l);
 
        if (ielem->expr)
        {
            /* Extract preliminary index col name before transforming expr */
            if (ielem->indexcolname == NULL)
                ielem->indexcolname = FigureIndexColname(ielem->expr);
 
            /* Now do parse transformation of the expression */
            ielem->expr = transformExpr(pstate, ielem->expr,
                                        EXPR_KIND_INDEX_EXPRESSION);
 
            /* We have to fix its collations too */
            assign_expr_collations(pstate, ielem->expr);
 
            /*
             * transformExpr() should have already rejected subqueries,
             * aggregates, window functions, and SRFs, based on the EXPR_KIND_
             * for an index expression.
             *
             * DefineIndex() will make more checks.
             */
        }
    }
 
    /*
     * Check that only the base rel is mentioned.  (This should be dead code
     * now that add_missing_from is history.)
     */
    if (list_length(pstate->p_rtable) != 1)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
                 errmsg("index expressions and predicates can refer only to the table being indexed")));
 
    free_parsestate(pstate);
 
    /* Close relation */
    table_close(rel, NoLock);
 
    /* Mark statement as successfully transformed */
    stmt->transformed = true;
 
    return stmt;
}

References AccessShareLock, addNSItemToQuery(), addRangeTableEntryForRelation(), assign_expr_collations(), ereport, errcode(), errmsg(), ERROR, IndexElem::expr, EXPR_KIND_INDEX_EXPRESSION, EXPR_KIND_INDEX_PREDICATE, FigureIndexColname(), free_parsestate(), IndexElem::indexcolname, lfirst, list_length(), make_parsestate(), NoLock, ParseState::p_rtable, ParseState::p_sourcetext, relation_open(), stmt, table_close(), transformExpr(), and transformWhereClause().

Referenced by ATPostAlterTypeParse(), ProcessUtilitySlow(), and transformAlterTableStmt().

◆ transformOfType()

static void transformOfType	(	CreateStmtContext *	cxt,
		TypeName *	ofTypename
	)

static

Definition at line 1618 of file parse_utilcmd.c.

{
    HeapTuple   tuple;
    TupleDesc   tupdesc;
    int         i;
    Oid         ofTypeId;
 
    Assert(ofTypename);
 
    tuple = typenameType(cxt->pstate, ofTypename, NULL);
    check_of_type(tuple);
    ofTypeId = ((Form_pg_type) GETSTRUCT(tuple))->oid;
    ofTypename->typeOid = ofTypeId; /* cached for later */
 
    tupdesc = lookup_rowtype_tupdesc(ofTypeId, -1);
    for (i = 0; i < tupdesc->natts; i++)
    {
        Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
        ColumnDef  *n;
 
        if (attr->attisdropped)
            continue;
 
        n = makeColumnDef(NameStr(attr->attname), attr->atttypid,
                          attr->atttypmod, attr->attcollation);
        n->is_from_type = true;
 
        cxt->columns = lappend(cxt->columns, n);
    }
    ReleaseTupleDesc(tupdesc);
 
    ReleaseSysCache(tuple);
}

References Assert(), check_of_type(), CreateStmtContext::columns, GETSTRUCT(), i, ColumnDef::is_from_type, lappend(), lookup_rowtype_tupdesc(), makeColumnDef(), NameStr, TupleDescData::natts, CreateStmtContext::pstate, ReleaseSysCache(), ReleaseTupleDesc, TupleDescAttr(), typenameType(), and TypeName::typeOid.

Referenced by transformCreateStmt().

◆ transformPartitionBound()

PartitionBoundSpec * transformPartitionBound	(	ParseState *	pstate,
		Relation	parent,
		PartitionBoundSpec *	spec
	)

Definition at line 4257 of file parse_utilcmd.c.

{
    PartitionBoundSpec *result_spec;
    PartitionKey key = RelationGetPartitionKey(parent);
    char        strategy = get_partition_strategy(key);
    int         partnatts = get_partition_natts(key);
    List       *partexprs = get_partition_exprs(key);
 
    /* Avoid scribbling on input */
    result_spec = copyObject(spec);
 
    if (spec->is_default)
    {
        /*
         * Hash partitioning does not support a default partition; there's no
         * use case for it (since the set of partitions to create is perfectly
         * defined), and if users do get into it accidentally, it's hard to
         * back out from it afterwards.
         */
        if (strategy == PARTITION_STRATEGY_HASH)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("a hash-partitioned table may not have a default partition")));
 
        /*
         * In case of the default partition, parser had no way to identify the
         * partition strategy. Assign the parent's strategy to the default
         * partition bound spec.
         */
        result_spec->strategy = strategy;
 
        return result_spec;
    }
 
    if (strategy == PARTITION_STRATEGY_HASH)
    {
        if (spec->strategy != PARTITION_STRATEGY_HASH)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("invalid bound specification for a hash partition"),
                     parser_errposition(pstate, exprLocation((Node *) spec))));
 
        if (spec->modulus <= 0)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("modulus for hash partition must be an integer value greater than zero")));
 
        Assert(spec->remainder >= 0);
 
        if (spec->remainder >= spec->modulus)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("remainder for hash partition must be less than modulus")));
    }
    else if (strategy == PARTITION_STRATEGY_LIST)
    {
        ListCell   *cell;
        char       *colname;
        Oid         coltype;
        int32       coltypmod;
        Oid         partcollation;
 
        if (spec->strategy != PARTITION_STRATEGY_LIST)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("invalid bound specification for a list partition"),
                     parser_errposition(pstate, exprLocation((Node *) spec))));
 
        /* Get the only column's name in case we need to output an error */
        if (key->partattrs[0] != 0)
            colname = get_attname(RelationGetRelid(parent),
                                  key->partattrs[0], false);
        else
            colname = deparse_expression((Node *) linitial(partexprs),
                                         deparse_context_for(RelationGetRelationName(parent),
                                                             RelationGetRelid(parent)),
                                         false, false);
        /* Need its type data too */
        coltype = get_partition_col_typid(key, 0);
        coltypmod = get_partition_col_typmod(key, 0);
        partcollation = get_partition_col_collation(key, 0);
 
        result_spec->listdatums = NIL;
        foreach(cell, spec->listdatums)
        {
            Node       *expr = lfirst(cell);
            Const      *value;
            ListCell   *cell2;
            bool        duplicate;
 
            value = transformPartitionBoundValue(pstate, expr,
                                                 colname, coltype, coltypmod,
                                                 partcollation);
 
            /* Don't add to the result if the value is a duplicate */
            duplicate = false;
            foreach(cell2, result_spec->listdatums)
            {
                Const      *value2 = lfirst_node(Const, cell2);
 
                if (equal(value, value2))
                {
                    duplicate = true;
                    break;
                }
            }
            if (duplicate)
                continue;
 
            result_spec->listdatums = lappend(result_spec->listdatums,
                                              value);
        }
    }
    else if (strategy == PARTITION_STRATEGY_RANGE)
    {
        if (spec->strategy != PARTITION_STRATEGY_RANGE)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("invalid bound specification for a range partition"),
                     parser_errposition(pstate, exprLocation((Node *) spec))));
 
        if (list_length(spec->lowerdatums) != partnatts)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("FROM must specify exactly one value per partitioning column")));
        if (list_length(spec->upperdatums) != partnatts)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                     errmsg("TO must specify exactly one value per partitioning column")));
 
        /*
         * Convert raw parse nodes into PartitionRangeDatum nodes and perform
         * any necessary validation.
         */
        result_spec->lowerdatums =
            transformPartitionRangeBounds(pstate, spec->lowerdatums,
                                          parent);
        result_spec->upperdatums =
            transformPartitionRangeBounds(pstate, spec->upperdatums,
                                          parent);
    }
    else
        elog(ERROR, "unexpected partition strategy: %d", (int) strategy);
 
    return result_spec;
}

References Assert(), copyObject, deparse_context_for(), deparse_expression(), elog, equal(), ereport, errcode(), errmsg(), ERROR, exprLocation(), get_attname(), get_partition_col_collation(), get_partition_col_typid(), get_partition_col_typmod(), get_partition_exprs(), get_partition_natts(), get_partition_strategy(), PartitionBoundSpec::is_default, sort-test::key, lappend(), lfirst, lfirst_node, linitial, list_length(), PartitionBoundSpec::listdatums, PartitionBoundSpec::lowerdatums, NIL, parser_errposition(), PARTITION_STRATEGY_HASH, PARTITION_STRATEGY_LIST, PARTITION_STRATEGY_RANGE, RelationGetPartitionKey(), RelationGetRelationName, RelationGetRelid, PartitionBoundSpec::strategy, transformPartitionBoundValue(), transformPartitionRangeBounds(), PartitionBoundSpec::upperdatums, and value.

Referenced by DefineRelation(), and transformPartitionCmd().

◆ transformPartitionBoundValue()

static Const * transformPartitionBoundValue	(	ParseState *	pstate,
		Node *	val,
		const char *	colName,
		Oid	colType,
		int32	colTypmod,
		Oid	partCollation
	)

static

Definition at line 4567 of file parse_utilcmd.c.

{
    Node       *value;
 
    /* Transform raw parsetree */
    value = transformExpr(pstate, val, EXPR_KIND_PARTITION_BOUND);
 
    /*
     * transformExpr() should have already rejected column references,
     * subqueries, aggregates, window functions, and SRFs, based on the
     * EXPR_KIND_ of a partition bound expression.
     */
    Assert(!contain_var_clause(value));
 
    /*
     * Coerce to the correct type.  This might cause an explicit coercion step
     * to be added on top of the expression, which must be evaluated before
     * returning the result to the caller.
     */
    value = coerce_to_target_type(pstate,
                                  value, exprType(value),
                                  colType,
                                  colTypmod,
                                  COERCION_ASSIGNMENT,
                                  COERCE_IMPLICIT_CAST,
                                  -1);
 
    if (value == NULL)
        ereport(ERROR,
                (errcode(ERRCODE_DATATYPE_MISMATCH),
                 errmsg("specified value cannot be cast to type %s for column \"%s\"",
                        format_type_be(colType), colName),
                 parser_errposition(pstate, exprLocation(val))));
 
    /*
     * Evaluate the expression, if needed, assigning the partition key's data
     * type and collation to the resulting Const node.
     */
    if (!IsA(value, Const))
    {
        assign_expr_collations(pstate, value);
        value = (Node *) expression_planner((Expr *) value);
        value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
                                       partCollation);
        if (!IsA(value, Const))
            elog(ERROR, "could not evaluate partition bound expression");
    }
    else
    {
        /*
         * If the expression is already a Const, as is often the case, we can
         * skip the rather expensive steps above.  But we still have to insert
         * the right collation, since coerce_to_target_type doesn't handle
         * that.
         */
        ((Const *) value)->constcollid = partCollation;
    }
 
    /*
     * Attach original expression's parse location to the Const, so that
     * that's what will be reported for any later errors related to this
     * partition bound.
     */
    ((Const *) value)->location = exprLocation(val);
 
    return (Const *) value;
}

References Assert(), assign_expr_collations(), COERCE_IMPLICIT_CAST, coerce_to_target_type(), COERCION_ASSIGNMENT, contain_var_clause(), elog, ereport, errcode(), errmsg(), ERROR, evaluate_expr(), EXPR_KIND_PARTITION_BOUND, expression_planner(), exprLocation(), exprType(), format_type_be(), IsA, parser_errposition(), transformExpr(), val, and value.

Referenced by transformPartitionBound(), and transformPartitionRangeBounds().

◆ transformPartitionCmd()

static void transformPartitionCmd	(	CreateStmtContext *	cxt,
		PartitionCmd *	cmd
	)

static

Definition at line 4204 of file parse_utilcmd.c.

{
    Relation    parentRel = cxt->rel;
 
    switch (parentRel->rd_rel->relkind)
    {
        case RELKIND_PARTITIONED_TABLE:
            /* transform the partition bound, if any */
            Assert(RelationGetPartitionKey(parentRel) != NULL);
            if (cmd->bound != NULL)
                cxt->partbound = transformPartitionBound(cxt->pstate, parentRel,
                                                         cmd->bound);
            break;
        case RELKIND_PARTITIONED_INDEX:
 
            /*
             * A partitioned index cannot have a partition bound set.  ALTER
             * INDEX prevents that with its grammar, but not ALTER TABLE.
             */
            if (cmd->bound != NULL)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                         errmsg("\"%s\" is not a partitioned table",
                                RelationGetRelationName(parentRel))));
            break;
        case RELKIND_RELATION:
            /* the table must be partitioned */
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                     errmsg("table \"%s\" is not partitioned",
                            RelationGetRelationName(parentRel))));
            break;
        case RELKIND_INDEX:
            /* the index must be partitioned */
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                     errmsg("index \"%s\" is not partitioned",
                            RelationGetRelationName(parentRel))));
            break;
        default:
            /* parser shouldn't let this case through */
            elog(ERROR, "\"%s\" is not a partitioned table or index",
                 RelationGetRelationName(parentRel));
            break;
    }
}

References Assert(), PartitionCmd::bound, elog, ereport, errcode(), errmsg(), ERROR, CreateStmtContext::partbound, CreateStmtContext::pstate, RelationData::rd_rel, CreateStmtContext::rel, RelationGetPartitionKey(), RelationGetRelationName, and transformPartitionBound().

Referenced by transformAlterTableStmt().

◆ transformPartitionRangeBounds()

static List * transformPartitionRangeBounds	(	ParseState *	pstate,
		List *	blist,
		Relation	parent
	)

static

Definition at line 4411 of file parse_utilcmd.c.

{
    List       *result = NIL;
    PartitionKey key = RelationGetPartitionKey(parent);
    List       *partexprs = get_partition_exprs(key);
    ListCell   *lc;
    int         i,
                j;
 
    i = j = 0;
    foreach(lc, blist)
    {
        Node       *expr = lfirst(lc);
        PartitionRangeDatum *prd = NULL;
 
        /*
         * Infinite range bounds -- "minvalue" and "maxvalue" -- get passed in
         * as ColumnRefs.
         */
        if (IsA(expr, ColumnRef))
        {
            ColumnRef  *cref = (ColumnRef *) expr;
            char       *cname = NULL;
 
            /*
             * There should be a single field named either "minvalue" or
             * "maxvalue".
             */
            if (list_length(cref->fields) == 1 &&
                IsA(linitial(cref->fields), String))
                cname = strVal(linitial(cref->fields));
 
            if (cname == NULL)
            {
                /*
                 * ColumnRef is not in the desired single-field-name form. For
                 * consistency between all partition strategies, let the
                 * expression transformation report any errors rather than
                 * doing it ourselves.
                 */
            }
            else if (strcmp("minvalue", cname) == 0)
            {
                prd = makeNode(PartitionRangeDatum);
                prd->kind = PARTITION_RANGE_DATUM_MINVALUE;
                prd->value = NULL;
            }
            else if (strcmp("maxvalue", cname) == 0)
            {
                prd = makeNode(PartitionRangeDatum);
                prd->kind = PARTITION_RANGE_DATUM_MAXVALUE;
                prd->value = NULL;
            }
        }
 
        if (prd == NULL)
        {
            char       *colname;
            Oid         coltype;
            int32       coltypmod;
            Oid         partcollation;
            Const      *value;
 
            /* Get the column's name in case we need to output an error */
            if (key->partattrs[i] != 0)
                colname = get_attname(RelationGetRelid(parent),
                                      key->partattrs[i], false);
            else
            {
                colname = deparse_expression((Node *) list_nth(partexprs, j),
                                             deparse_context_for(RelationGetRelationName(parent),
                                                                 RelationGetRelid(parent)),
                                             false, false);
                ++j;
            }
 
            /* Need its type data too */
            coltype = get_partition_col_typid(key, i);
            coltypmod = get_partition_col_typmod(key, i);
            partcollation = get_partition_col_collation(key, i);
 
            value = transformPartitionBoundValue(pstate, expr,
                                                 colname,
                                                 coltype, coltypmod,
                                                 partcollation);
            if (value->constisnull)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                         errmsg("cannot specify NULL in range bound")));
            prd = makeNode(PartitionRangeDatum);
            prd->kind = PARTITION_RANGE_DATUM_VALUE;
            prd->value = (Node *) value;
            ++i;
        }
 
        prd->location = exprLocation(expr);
 
        result = lappend(result, prd);
    }
 
    /*
     * Once we see MINVALUE or MAXVALUE for one column, the remaining columns
     * must be the same.
     */
    validateInfiniteBounds(pstate, result);
 
    return result;
}

References deparse_context_for(), deparse_expression(), ereport, errcode(), errmsg(), ERROR, exprLocation(), ColumnRef::fields, get_attname(), get_partition_col_collation(), get_partition_col_typid(), get_partition_col_typmod(), get_partition_exprs(), i, IsA, j, sort-test::key, PartitionRangeDatum::kind, lappend(), lfirst, linitial, list_length(), list_nth(), PartitionRangeDatum::location, makeNode, NIL, PARTITION_RANGE_DATUM_MAXVALUE, PARTITION_RANGE_DATUM_MINVALUE, PARTITION_RANGE_DATUM_VALUE, RelationGetPartitionKey(), RelationGetRelationName, RelationGetRelid, strVal, transformPartitionBoundValue(), validateInfiniteBounds(), PartitionRangeDatum::value, and value.

Referenced by transformPartitionBound().

◆ transformRuleStmt()

void transformRuleStmt	(	RuleStmt *	stmt,
		const char *	queryString,
		List **	actions,
		Node **	whereClause
	)

Definition at line 3198 of file parse_utilcmd.c.

{
    Relation    rel;
    ParseState *pstate;
    ParseNamespaceItem *oldnsitem;
    ParseNamespaceItem *newnsitem;
 
    /*
     * To avoid deadlock, make sure the first thing we do is grab
     * AccessExclusiveLock on the target relation.  This will be needed by
     * DefineQueryRewrite(), and we don't want to grab a lesser lock
     * beforehand.
     */
    rel = table_openrv(stmt->relation, AccessExclusiveLock);
 
    if (rel->rd_rel->relkind == RELKIND_MATVIEW)
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("rules on materialized views are not supported")));
 
    /* Set up pstate */
    pstate = make_parsestate(NULL);
    pstate->p_sourcetext = queryString;
 
    /*
     * NOTE: 'OLD' must always have a varno equal to 1 and 'NEW' equal to 2.
     * Set up their ParseNamespaceItems in the main pstate for use in parsing
     * the rule qualification.
     */
    oldnsitem = addRangeTableEntryForRelation(pstate, rel,
                                              AccessShareLock,
                                              makeAlias("old", NIL),
                                              false, false);
    newnsitem = addRangeTableEntryForRelation(pstate, rel,
                                              AccessShareLock,
                                              makeAlias("new", NIL),
                                              false, false);
 
    /*
     * They must be in the namespace too for lookup purposes, but only add the
     * one(s) that are relevant for the current kind of rule.  In an UPDATE
     * rule, quals must refer to OLD.field or NEW.field to be unambiguous, but
     * there's no need to be so picky for INSERT & DELETE.  We do not add them
     * to the joinlist.
     */
    switch (stmt->event)
    {
        case CMD_SELECT:
            addNSItemToQuery(pstate, oldnsitem, false, true, true);
            break;
        case CMD_UPDATE:
            addNSItemToQuery(pstate, oldnsitem, false, true, true);
            addNSItemToQuery(pstate, newnsitem, false, true, true);
            break;
        case CMD_INSERT:
            addNSItemToQuery(pstate, newnsitem, false, true, true);
            break;
        case CMD_DELETE:
            addNSItemToQuery(pstate, oldnsitem, false, true, true);
            break;
        default:
            elog(ERROR, "unrecognized event type: %d",
                 (int) stmt->event);
            break;
    }
 
    /* take care of the where clause */
    *whereClause = transformWhereClause(pstate,
                                        stmt->whereClause,
                                        EXPR_KIND_WHERE,
                                        "WHERE");
    /* we have to fix its collations too */
    assign_expr_collations(pstate, *whereClause);
 
    /* this is probably dead code without add_missing_from: */
    if (list_length(pstate->p_rtable) != 2) /* naughty, naughty... */
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                 errmsg("rule WHERE condition cannot contain references to other relations")));
 
    /*
     * 'instead nothing' rules with a qualification need a query rangetable so
     * the rewrite handler can add the negated rule qualification to the
     * original query. We create a query with the new command type CMD_NOTHING
     * here that is treated specially by the rewrite system.
     */
    if (stmt->actions == NIL)
    {
        Query      *nothing_qry = makeNode(Query);
 
        nothing_qry->commandType = CMD_NOTHING;
        nothing_qry->rtable = pstate->p_rtable;
        nothing_qry->rteperminfos = pstate->p_rteperminfos;
        nothing_qry->jointree = makeFromExpr(NIL, NULL);    /* no join wanted */
 
        *actions = list_make1(nothing_qry);
    }
    else
    {
        ListCell   *l;
        List       *newactions = NIL;
 
        /*
         * transform each statement, like parse_sub_analyze()
         */
        foreach(l, stmt->actions)
        {
            Node       *action = (Node *) lfirst(l);
            ParseState *sub_pstate = make_parsestate(NULL);
            Query      *sub_qry,
                       *top_subqry;
            bool        has_old,
                        has_new;
 
            /*
             * Since outer ParseState isn't parent of inner, have to pass down
             * the query text by hand.
             */
            sub_pstate->p_sourcetext = queryString;
 
            /*
             * Set up OLD/NEW in the rtable for this statement.  The entries
             * are added only to relnamespace, not varnamespace, because we
             * don't want them to be referred to by unqualified field names
             * nor "*" in the rule actions.  We decide later whether to put
             * them in the joinlist.
             */
            oldnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
                                                      AccessShareLock,
                                                      makeAlias("old", NIL),
                                                      false, false);
            newnsitem = addRangeTableEntryForRelation(sub_pstate, rel,
                                                      AccessShareLock,
                                                      makeAlias("new", NIL),
                                                      false, false);
            addNSItemToQuery(sub_pstate, oldnsitem, false, true, false);
            addNSItemToQuery(sub_pstate, newnsitem, false, true, false);
 
            /* Transform the rule action statement */
            top_subqry = transformStmt(sub_pstate, action);
 
            /*
             * We cannot support utility-statement actions (eg NOTIFY) with
             * nonempty rule WHERE conditions, because there's no way to make
             * the utility action execute conditionally.
             */
            if (top_subqry->commandType == CMD_UTILITY &&
                *whereClause != NULL)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                         errmsg("rules with WHERE conditions can only have SELECT, INSERT, UPDATE, or DELETE actions")));
 
            /*
             * If the action is INSERT...SELECT, OLD/NEW have been pushed down
             * into the SELECT, and that's what we need to look at. (Ugly
             * kluge ... try to fix this when we redesign querytrees.)
             */
            sub_qry = getInsertSelectQuery(top_subqry, NULL);
 
            /*
             * If the sub_qry is a setop, we cannot attach any qualifications
             * to it, because the planner won't notice them.  This could
             * perhaps be relaxed someday, but for now, we may as well reject
             * such a rule immediately.
             */
            if (sub_qry->setOperations != NULL && *whereClause != NULL)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
 
            /*
             * Validate action's use of OLD/NEW, qual too
             */
            has_old =
                rangeTableEntry_used((Node *) sub_qry, PRS2_OLD_VARNO, 0) ||
                rangeTableEntry_used(*whereClause, PRS2_OLD_VARNO, 0);
            has_new =
                rangeTableEntry_used((Node *) sub_qry, PRS2_NEW_VARNO, 0) ||
                rangeTableEntry_used(*whereClause, PRS2_NEW_VARNO, 0);
 
            switch (stmt->event)
            {
                case CMD_SELECT:
                    if (has_old)
                        ereport(ERROR,
                                (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                 errmsg("ON SELECT rule cannot use OLD")));
                    if (has_new)
                        ereport(ERROR,
                                (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                 errmsg("ON SELECT rule cannot use NEW")));
                    break;
                case CMD_UPDATE:
                    /* both are OK */
                    break;
                case CMD_INSERT:
                    if (has_old)
                        ereport(ERROR,
                                (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                 errmsg("ON INSERT rule cannot use OLD")));
                    break;
                case CMD_DELETE:
                    if (has_new)
                        ereport(ERROR,
                                (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
                                 errmsg("ON DELETE rule cannot use NEW")));
                    break;
                default:
                    elog(ERROR, "unrecognized event type: %d",
                         (int) stmt->event);
                    break;
            }
 
            /*
             * OLD/NEW are not allowed in WITH queries, because they would
             * amount to outer references for the WITH, which we disallow.
             * However, they were already in the outer rangetable when we
             * analyzed the query, so we have to check.
             *
             * Note that in the INSERT...SELECT case, we need to examine the
             * CTE lists of both top_subqry and sub_qry.
             *
             * Note that we aren't digging into the body of the query looking
             * for WITHs in nested sub-SELECTs.  A WITH down there can
             * legitimately refer to OLD/NEW, because it'd be an
             * indirect-correlated outer reference.
             */
            if (rangeTableEntry_used((Node *) top_subqry->cteList,
                                     PRS2_OLD_VARNO, 0) ||
                rangeTableEntry_used((Node *) sub_qry->cteList,
                                     PRS2_OLD_VARNO, 0))
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("cannot refer to OLD within WITH query")));
            if (rangeTableEntry_used((Node *) top_subqry->cteList,
                                     PRS2_NEW_VARNO, 0) ||
                rangeTableEntry_used((Node *) sub_qry->cteList,
                                     PRS2_NEW_VARNO, 0))
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("cannot refer to NEW within WITH query")));
 
            /*
             * For efficiency's sake, add OLD to the rule action's jointree
             * only if it was actually referenced in the statement or qual.
             *
             * For INSERT, NEW is not really a relation (only a reference to
             * the to-be-inserted tuple) and should never be added to the
             * jointree.
             *
             * For UPDATE, we treat NEW as being another kind of reference to
             * OLD, because it represents references to *transformed* tuples
             * of the existing relation.  It would be wrong to enter NEW
             * separately in the jointree, since that would cause a double
             * join of the updated relation.  It's also wrong to fail to make
             * a jointree entry if only NEW and not OLD is mentioned.
             */
            if (has_old || (has_new && stmt->event == CMD_UPDATE))
            {
                RangeTblRef *rtr;
 
                /*
                 * If sub_qry is a setop, manipulating its jointree will do no
                 * good at all, because the jointree is dummy. (This should be
                 * a can't-happen case because of prior tests.)
                 */
                if (sub_qry->setOperations != NULL)
                    ereport(ERROR,
                            (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                             errmsg("conditional UNION/INTERSECT/EXCEPT statements are not implemented")));
                /* hackishly add OLD to the already-built FROM clause */
                rtr = makeNode(RangeTblRef);
                rtr->rtindex = oldnsitem->p_rtindex;
                sub_qry->jointree->fromlist =
                    lappend(sub_qry->jointree->fromlist, rtr);
            }
 
            newactions = lappend(newactions, top_subqry);
 
            free_parsestate(sub_pstate);
        }
 
        *actions = newactions;
    }
 
    free_parsestate(pstate);
 
    /* Close relation, but keep the exclusive lock */
    table_close(rel, NoLock);
}

References AccessExclusiveLock, AccessShareLock, generate_unaccent_rules::action, addNSItemToQuery(), addRangeTableEntryForRelation(), assign_expr_collations(), CMD_DELETE, CMD_INSERT, CMD_NOTHING, CMD_SELECT, CMD_UPDATE, CMD_UTILITY, Query::commandType, Query::cteList, elog, ereport, errcode(), errmsg(), ERROR, EXPR_KIND_WHERE, free_parsestate(), FromExpr::fromlist, getInsertSelectQuery(), Query::jointree, lappend(), lfirst, list_length(), list_make1, make_parsestate(), makeAlias(), makeFromExpr(), makeNode, NIL, NoLock, ParseState::p_rtable, ParseState::p_rteperminfos, ParseNamespaceItem::p_rtindex, ParseState::p_sourcetext, PRS2_NEW_VARNO, PRS2_OLD_VARNO, rangeTableEntry_used(), RelationData::rd_rel, Query::rtable, RangeTblRef::rtindex, Query::setOperations, stmt, table_close(), table_openrv(), transformStmt(), and transformWhereClause().

Referenced by DefineRule().

◆ transformStatsStmt()

CreateStatsStmt * transformStatsStmt	(	Oid	relid,
		CreateStatsStmt *	stmt,
		const char *	queryString
	)

Definition at line 3123 of file parse_utilcmd.c.

{
    ParseState *pstate;
    ParseNamespaceItem *nsitem;
    ListCell   *l;
    Relation    rel;
 
    /* Nothing to do if statement already transformed. */
    if (stmt->transformed)
        return stmt;
 
    /* Set up pstate */
    pstate = make_parsestate(NULL);
    pstate->p_sourcetext = queryString;
 
    /*
     * Put the parent table into the rtable so that the expressions can refer
     * to its fields without qualification.  Caller is responsible for locking
     * relation, but we still need to open it.
     */
    rel = relation_open(relid, NoLock);
    nsitem = addRangeTableEntryForRelation(pstate, rel,
                                           AccessShareLock,
                                           NULL, false, true);
 
    /* no to join list, yes to namespaces */
    addNSItemToQuery(pstate, nsitem, false, true, true);
 
    /* take care of any expressions */
    foreach(l, stmt->exprs)
    {
        StatsElem  *selem = (StatsElem *) lfirst(l);
 
        if (selem->expr)
        {
            /* Now do parse transformation of the expression */
            selem->expr = transformExpr(pstate, selem->expr,
                                        EXPR_KIND_STATS_EXPRESSION);
 
            /* We have to fix its collations too */
            assign_expr_collations(pstate, selem->expr);
        }
    }
 
    /*
     * Check that only the base rel is mentioned.  (This should be dead code
     * now that add_missing_from is history.)
     */
    if (list_length(pstate->p_rtable) != 1)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
                 errmsg("statistics expressions can refer only to the table being referenced")));
 
    free_parsestate(pstate);
 
    /* Close relation */
    table_close(rel, NoLock);
 
    /* Mark statement as successfully transformed */
    stmt->transformed = true;
 
    return stmt;
}

References AccessShareLock, addNSItemToQuery(), addRangeTableEntryForRelation(), assign_expr_collations(), ereport, errcode(), errmsg(), ERROR, StatsElem::expr, EXPR_KIND_STATS_EXPRESSION, free_parsestate(), lfirst, list_length(), make_parsestate(), NoLock, ParseState::p_rtable, ParseState::p_sourcetext, relation_open(), stmt, table_close(), and transformExpr().

Referenced by ATPostAlterTypeParse(), and ProcessUtilitySlow().

◆ transformTableConstraint()

static void transformTableConstraint	(	CreateStmtContext *	cxt,
		Constraint *	constraint
	)

static

Definition at line 1035 of file parse_utilcmd.c.

{
    switch (constraint->contype)
    {
        case CONSTR_PRIMARY:
            if (cxt->isforeign)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("primary key constraints are not supported on foreign tables"),
                         parser_errposition(cxt->pstate,
                                            constraint->location)));
            cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
            break;
 
        case CONSTR_UNIQUE:
            if (cxt->isforeign)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("unique constraints are not supported on foreign tables"),
                         parser_errposition(cxt->pstate,
                                            constraint->location)));
            cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
            break;
 
        case CONSTR_EXCLUSION:
            if (cxt->isforeign)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("exclusion constraints are not supported on foreign tables"),
                         parser_errposition(cxt->pstate,
                                            constraint->location)));
            cxt->ixconstraints = lappend(cxt->ixconstraints, constraint);
            break;
 
        case CONSTR_CHECK:
            cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
            break;
 
        case CONSTR_NOTNULL:
            if (cxt->ispartitioned && constraint->is_no_inherit)
                ereport(ERROR,
                        errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                        errmsg("not-null constraints on partitioned tables cannot be NO INHERIT"));
 
            cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
            break;
 
        case CONSTR_FOREIGN:
            if (cxt->isforeign)
                ereport(ERROR,
                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                         errmsg("foreign key constraints are not supported on foreign tables"),
                         parser_errposition(cxt->pstate,
                                            constraint->location)));
            cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
            break;
 
        case CONSTR_NULL:
        case CONSTR_DEFAULT:
        case CONSTR_ATTR_DEFERRABLE:
        case CONSTR_ATTR_NOT_DEFERRABLE:
        case CONSTR_ATTR_DEFERRED:
        case CONSTR_ATTR_IMMEDIATE:
        case CONSTR_ATTR_ENFORCED:
        case CONSTR_ATTR_NOT_ENFORCED:
            elog(ERROR, "invalid context for constraint type %d",
                 constraint->contype);
            break;
 
        default:
            elog(ERROR, "unrecognized constraint type: %d",
                 constraint->contype);
            break;
    }
}

References CreateStmtContext::ckconstraints, CONSTR_ATTR_DEFERRABLE, CONSTR_ATTR_DEFERRED, CONSTR_ATTR_ENFORCED, CONSTR_ATTR_IMMEDIATE, CONSTR_ATTR_NOT_DEFERRABLE, CONSTR_ATTR_NOT_ENFORCED, CONSTR_CHECK, CONSTR_DEFAULT, CONSTR_EXCLUSION, CONSTR_FOREIGN, CONSTR_NOTNULL, CONSTR_NULL, CONSTR_PRIMARY, CONSTR_UNIQUE, Constraint::contype, elog, ereport, errcode(), errmsg(), ERROR, CreateStmtContext::fkconstraints, Constraint::is_no_inherit, CreateStmtContext::isforeign, CreateStmtContext::ispartitioned, CreateStmtContext::ixconstraints, lappend(), Constraint::location, CreateStmtContext::nnconstraints, parser_errposition(), and CreateStmtContext::pstate.

Referenced by transformAlterTableStmt(), and transformCreateStmt().

◆ transformTableLikeClause()

static void transformTableLikeClause	(	CreateStmtContext *	cxt,
		TableLikeClause *	table_like_clause
	)

static

Definition at line 1126 of file parse_utilcmd.c.

{
    AttrNumber  parent_attno;
    Relation    relation;
    TupleDesc   tupleDesc;
    AclResult   aclresult;
    char       *comment;
    ParseCallbackState pcbstate;
 
    setup_parser_errposition_callback(&pcbstate, cxt->pstate,
                                      table_like_clause->relation->location);
 
    /* Open the relation referenced by the LIKE clause */
    relation = relation_openrv(table_like_clause->relation, AccessShareLock);
 
    if (relation->rd_rel->relkind != RELKIND_RELATION &&
        relation->rd_rel->relkind != RELKIND_VIEW &&
        relation->rd_rel->relkind != RELKIND_MATVIEW &&
        relation->rd_rel->relkind != RELKIND_COMPOSITE_TYPE &&
        relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE &&
        relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("relation \"%s\" is invalid in LIKE clause",
                        RelationGetRelationName(relation)),
                 errdetail_relkind_not_supported(relation->rd_rel->relkind)));
 
    cancel_parser_errposition_callback(&pcbstate);
 
    /*
     * Check for privileges
     */
    if (relation->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
    {
        aclresult = object_aclcheck(TypeRelationId, relation->rd_rel->reltype, GetUserId(),
                                    ACL_USAGE);
        if (aclresult != ACLCHECK_OK)
            aclcheck_error(aclresult, OBJECT_TYPE,
                           RelationGetRelationName(relation));
    }
    else
    {
        aclresult = pg_class_aclcheck(RelationGetRelid(relation), GetUserId(),
                                      ACL_SELECT);
        if (aclresult != ACLCHECK_OK)
            aclcheck_error(aclresult, get_relkind_objtype(relation->rd_rel->relkind),
                           RelationGetRelationName(relation));
    }
 
    tupleDesc = RelationGetDescr(relation);
 
    /*
     * Insert the copied attributes into the cxt for the new table definition.
     * We must do this now so that they appear in the table in the relative
     * position where the LIKE clause is, as required by SQL99.
     */
    for (parent_attno = 1; parent_attno <= tupleDesc->natts;
         parent_attno++)
    {
        Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
                                                    parent_attno - 1);
        ColumnDef  *def;
 
        /*
         * Ignore dropped columns in the parent.
         */
        if (attribute->attisdropped)
            continue;
 
        /*
         * Create a new column definition
         */
        def = makeColumnDef(NameStr(attribute->attname), attribute->atttypid,
                            attribute->atttypmod, attribute->attcollation);
 
        /*
         * Add to column list
         */
        cxt->columns = lappend(cxt->columns, def);
 
        /*
         * Although we don't transfer the column's default/generation
         * expression now, we need to mark it GENERATED if appropriate.
         */
        if (attribute->atthasdef && attribute->attgenerated &&
            (table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
            def->generated = attribute->attgenerated;
 
        /*
         * Copy identity if requested
         */
        if (attribute->attidentity &&
            (table_like_clause->options & CREATE_TABLE_LIKE_IDENTITY) &&
            !cxt->isforeign)
        {
            Oid         seq_relid;
            List       *seq_options;
 
            /*
             * find sequence owned by old column; extract sequence parameters;
             * build new create sequence command
             */
            seq_relid = getIdentitySequence(relation, attribute->attnum, false);
            seq_options = sequence_options(seq_relid);
            generateSerialExtraStmts(cxt, def,
                                     InvalidOid, seq_options,
                                     true, false,
                                     NULL, NULL);
            def->identity = attribute->attidentity;
        }
 
        /* Likewise, copy storage if requested */
        if ((table_like_clause->options & CREATE_TABLE_LIKE_STORAGE) &&
            !cxt->isforeign)
            def->storage = attribute->attstorage;
        else
            def->storage = 0;
 
        /* Likewise, copy compression if requested */
        if ((table_like_clause->options & CREATE_TABLE_LIKE_COMPRESSION) != 0 &&
            CompressionMethodIsValid(attribute->attcompression) &&
            !cxt->isforeign)
            def->compression =
                pstrdup(GetCompressionMethodName(attribute->attcompression));
        else
            def->compression = NULL;
 
        /* Likewise, copy comment if requested */
        if ((table_like_clause->options & CREATE_TABLE_LIKE_COMMENTS) &&
            (comment = GetComment(attribute->attrelid,
                                  RelationRelationId,
                                  attribute->attnum)) != NULL)
        {
            CommentStmt *stmt = makeNode(CommentStmt);
 
            stmt->objtype = OBJECT_COLUMN;
            stmt->object = (Node *) list_make3(makeString(cxt->relation->schemaname),
                                               makeString(cxt->relation->relname),
                                               makeString(def->colname));
            stmt->comment = comment;
 
            cxt->alist = lappend(cxt->alist, stmt);
        }
    }
 
    /*
     * Reproduce not-null constraints, if any, by copying them.  We do this
     * regardless of options given.
     */
    if (tupleDesc->constr && tupleDesc->constr->has_not_null)
    {
        List       *lst;
 
        lst = RelationGetNotNullConstraints(RelationGetRelid(relation), false,
                                            true);
        cxt->nnconstraints = list_concat(cxt->nnconstraints, lst);
    }
 
    /*
     * We cannot yet deal with defaults, CHECK constraints, indexes, or
     * statistics, since we don't yet know what column numbers the copied
     * columns will have in the finished table.  If any of those options are
     * specified, add the LIKE clause to cxt->likeclauses so that
     * expandTableLikeClause will be called after we do know that.
     *
     * In order for this to work, we remember the relation OID so that
     * expandTableLikeClause is certain to open the same table.
     */
    if (table_like_clause->options &
        (CREATE_TABLE_LIKE_DEFAULTS |
         CREATE_TABLE_LIKE_GENERATED |
         CREATE_TABLE_LIKE_CONSTRAINTS |
         CREATE_TABLE_LIKE_INDEXES |
         CREATE_TABLE_LIKE_STATISTICS))
    {
        table_like_clause->relationOid = RelationGetRelid(relation);
        cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
    }
 
    /*
     * Close the parent rel, but keep our AccessShareLock on it until xact
     * commit.  That will prevent someone else from deleting or ALTERing the
     * parent before we can run expandTableLikeClause.
     */
    table_close(relation, NoLock);
}

References AccessShareLock, ACL_SELECT, ACL_USAGE, aclcheck_error(), ACLCHECK_OK, CreateStmtContext::alist, cancel_parser_errposition_callback(), ColumnDef::colname, CreateStmtContext::columns, comment, ColumnDef::compression, CompressionMethodIsValid, TupleDescData::constr, CREATE_TABLE_LIKE_COMMENTS, CREATE_TABLE_LIKE_COMPRESSION, CREATE_TABLE_LIKE_CONSTRAINTS, CREATE_TABLE_LIKE_DEFAULTS, CREATE_TABLE_LIKE_GENERATED, CREATE_TABLE_LIKE_IDENTITY, CREATE_TABLE_LIKE_INDEXES, CREATE_TABLE_LIKE_STATISTICS, CREATE_TABLE_LIKE_STORAGE, ereport, errcode(), errdetail_relkind_not_supported(), errmsg(), ERROR, ColumnDef::generated, generateSerialExtraStmts(), get_relkind_objtype(), GetComment(), GetCompressionMethodName(), getIdentitySequence(), GetUserId(), TupleConstr::has_not_null, ColumnDef::identity, InvalidOid, CreateStmtContext::isforeign, lappend(), CreateStmtContext::likeclauses, list_concat(), list_make3, RangeVar::location, makeColumnDef(), makeNode, makeString(), NameStr, TupleDescData::natts, CreateStmtContext::nnconstraints, NoLock, object_aclcheck(), OBJECT_COLUMN, OBJECT_TYPE, TableLikeClause::options, pg_class_aclcheck(), CreateStmtContext::pstate, pstrdup(), RelationData::rd_rel, CreateStmtContext::relation, TableLikeClause::relation, relation_openrv(), RelationGetDescr, RelationGetNotNullConstraints(), RelationGetRelationName, RelationGetRelid, TableLikeClause::relationOid, RangeVar::relname, RangeVar::schemaname, sequence_options(), setup_parser_errposition_callback(), stmt, ColumnDef::storage, table_close(), and TupleDescAttr().

Referenced by transformCreateStmt().

◆ validateInfiniteBounds()

static void validateInfiniteBounds	(	ParseState *	pstate,
		List *	blist
	)

static

Definition at line 4528 of file parse_utilcmd.c.

{
    ListCell   *lc;
    PartitionRangeDatumKind kind = PARTITION_RANGE_DATUM_VALUE;
 
    foreach(lc, blist)
    {
        PartitionRangeDatum *prd = lfirst_node(PartitionRangeDatum, lc);
 
        if (kind == prd->kind)
            continue;
 
        switch (kind)
        {
            case PARTITION_RANGE_DATUM_VALUE:
                kind = prd->kind;
                break;
 
            case PARTITION_RANGE_DATUM_MAXVALUE:
                ereport(ERROR,
                        (errcode(ERRCODE_DATATYPE_MISMATCH),
                         errmsg("every bound following MAXVALUE must also be MAXVALUE"),
                         parser_errposition(pstate, exprLocation((Node *) prd))));
                break;
 
            case PARTITION_RANGE_DATUM_MINVALUE:
                ereport(ERROR,
                        (errcode(ERRCODE_DATATYPE_MISMATCH),
                         errmsg("every bound following MINVALUE must also be MINVALUE"),
                         parser_errposition(pstate, exprLocation((Node *) prd))));
                break;
        }
    }
}

References ereport, errcode(), errmsg(), ERROR, exprLocation(), PartitionRangeDatum::kind, lfirst_node, parser_errposition(), PARTITION_RANGE_DATUM_MAXVALUE, PARTITION_RANGE_DATUM_MINVALUE, and PARTITION_RANGE_DATUM_VALUE.

Referenced by transformPartitionRangeBounds().

Data Structures

Macros

Functions

Macro Definition Documentation

◆ SUPPORTS_ATTRS

Function Documentation

◆ expandTableLikeClause()

◆ generateClonedExtStatsStmt()

◆ generateClonedIndexStmt()

◆ generateSerialExtraStmts()

◆ get_collation()

◆ get_opclass()

◆ setSchemaName()

◆ transformAlterTableStmt()

◆ transformCheckConstraints()

◆ transformColumnDefinition()

◆ transformColumnType()

◆ transformConstraintAttrs()

◆ transformCreateSchemaStmtElements()

◆ transformCreateStmt()

◆ transformFKConstraints()

◆ transformIndexConstraint()

◆ transformIndexConstraints()

◆ transformIndexStmt()

◆ transformOfType()

◆ transformPartitionBound()

◆ transformPartitionBoundValue()

◆ transformPartitionCmd()

◆ transformPartitionRangeBounds()

◆ transformRuleStmt()

◆ transformStatsStmt()

◆ transformTableConstraint()

◆ transformTableLikeClause()

◆ validateInfiniteBounds()