tablecmds.c File Reference

#include "postgres.h"
#include "access/attmap.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "access/heapam_xlog.h"
#include "access/multixact.h"
#include "access/reloptions.h"
#include "access/relscan.h"
#include "access/sysattr.h"
#include "access/tableam.h"
#include "access/toast_compression.h"
#include "access/xact.h"
#include "access/xlog.h"
#include "access/xloginsert.h"
#include "catalog/catalog.h"
#include "catalog/heap.h"
#include "catalog/index.h"
#include "catalog/namespace.h"
#include "catalog/objectaccess.h"
#include "catalog/partition.h"
#include "catalog/pg_am.h"
#include "catalog/pg_attrdef.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_depend.h"
#include "catalog/pg_foreign_table.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_largeobject.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_policy.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_publication_rel.h"
#include "catalog/pg_rewrite.h"
#include "catalog/pg_statistic_ext.h"
#include "catalog/pg_tablespace.h"
#include "catalog/pg_trigger.h"
#include "catalog/pg_type.h"
#include "catalog/storage.h"
#include "catalog/storage_xlog.h"
#include "catalog/toasting.h"
#include "commands/cluster.h"
#include "commands/comment.h"
#include "commands/defrem.h"
#include "commands/event_trigger.h"
#include "commands/sequence.h"
#include "commands/tablecmds.h"
#include "commands/tablespace.h"
#include "commands/trigger.h"
#include "commands/typecmds.h"
#include "commands/user.h"
#include "commands/vacuum.h"
#include "executor/executor.h"
#include "foreign/fdwapi.h"
#include "foreign/foreign.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "nodes/parsenodes.h"
#include "optimizer/optimizer.h"
#include "parser/parse_coerce.h"
#include "parser/parse_collate.h"
#include "parser/parse_expr.h"
#include "parser/parse_relation.h"
#include "parser/parse_type.h"
#include "parser/parse_utilcmd.h"
#include "parser/parser.h"
#include "partitioning/partbounds.h"
#include "partitioning/partdesc.h"
#include "pgstat.h"
#include "rewrite/rewriteDefine.h"
#include "rewrite/rewriteHandler.h"
#include "rewrite/rewriteManip.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
#include "storage/lock.h"
#include "storage/predicate.h"
#include "storage/smgr.h"
#include "tcop/utility.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/partcache.h"
#include "utils/relcache.h"
#include "utils/ruleutils.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
#include "utils/timestamp.h"
#include "utils/typcache.h"
#include "utils/usercontext.h"

Include dependency graph for tablecmds.c:

Go to the source code of this file.

Data Structures
struct	OnCommitItem
struct	AlteredTableInfo
struct	NewConstraint
struct	NewColumnValue
struct	dropmsgstrings
struct	DropRelationCallbackState
struct	ForeignTruncateInfo
struct	AttachIndexCallbackState

Macros
#define	AT_NUM_PASSES   (AT_PASS_MISC + 1)
#define	ATT_TABLE   0x0001
#define	ATT_VIEW   0x0002
#define	ATT_MATVIEW   0x0004
#define	ATT_INDEX   0x0008
#define	ATT_COMPOSITE_TYPE   0x0010
#define	ATT_FOREIGN_TABLE   0x0020
#define	ATT_PARTITIONED_INDEX   0x0040
#define	ATT_SEQUENCE   0x0080
#define	child_dependency_type(child_is_partition)    ((child_is_partition) ? DEPENDENCY_AUTO : DEPENDENCY_NORMAL)

Typedefs
typedef struct OnCommitItem	OnCommitItem
typedef enum AlterTablePass	AlterTablePass
typedef struct AlteredTableInfo	AlteredTableInfo
typedef struct NewConstraint	NewConstraint
typedef struct NewColumnValue	NewColumnValue
typedef struct ForeignTruncateInfo	ForeignTruncateInfo

Enumerations
enum	AlterTablePass {   AT_PASS_UNSET = -1 , AT_PASS_DROP , AT_PASS_ALTER_TYPE , AT_PASS_ADD_COL ,   AT_PASS_SET_EXPRESSION , AT_PASS_OLD_INDEX , AT_PASS_OLD_CONSTR , AT_PASS_ADD_CONSTR ,   AT_PASS_COL_ATTRS , AT_PASS_ADD_INDEXCONSTR , AT_PASS_ADD_INDEX , AT_PASS_ADD_OTHERCONSTR ,   AT_PASS_MISC }

Functions
static void	truncate_check_rel (Oid relid, Form_pg_class reltuple)
static void	truncate_check_perms (Oid relid, Form_pg_class reltuple)
static void	truncate_check_activity (Relation rel)
static void	RangeVarCallbackForTruncate (const RangeVar *relation, Oid relId, Oid oldRelId, void *arg)
static List *	MergeAttributes (List *columns, const List *supers, char relpersistence, bool is_partition, List **supconstr)
static List *	MergeCheckConstraint (List *constraints, const char *name, Node *expr)
static void	MergeChildAttribute (List *inh_columns, int exist_attno, int newcol_attno, const ColumnDef *newdef)
static ColumnDef *	MergeInheritedAttribute (List *inh_columns, int exist_attno, const ColumnDef *newdef)
static void	MergeAttributesIntoExisting (Relation child_rel, Relation parent_rel, bool ispartition)
static void	MergeConstraintsIntoExisting (Relation child_rel, Relation parent_rel)
static void	StoreCatalogInheritance (Oid relationId, List *supers, bool child_is_partition)
static void	StoreCatalogInheritance1 (Oid relationId, Oid parentOid, int32 seqNumber, Relation inhRelation, bool child_is_partition)
static int	findAttrByName (const char *attributeName, const List *columns)
static void	AlterIndexNamespaces (Relation classRel, Relation rel, Oid oldNspOid, Oid newNspOid, ObjectAddresses *objsMoved)
static void	AlterSeqNamespaces (Relation classRel, Relation rel, Oid oldNspOid, Oid newNspOid, ObjectAddresses *objsMoved, LOCKMODE lockmode)
static ObjectAddress	ATExecAlterConstraint (Relation rel, AlterTableCmd *cmd, bool recurse, bool recursing, LOCKMODE lockmode)
static bool	ATExecAlterConstrRecurse (Constraint *cmdcon, Relation conrel, Relation tgrel, Relation rel, HeapTuple contuple, List **otherrelids, LOCKMODE lockmode)
static ObjectAddress	ATExecValidateConstraint (List **wqueue, Relation rel, char *constrName, bool recurse, bool recursing, LOCKMODE lockmode)
static int	transformColumnNameList (Oid relId, List *colList, int16 *attnums, Oid *atttypids)
static int	transformFkeyGetPrimaryKey (Relation pkrel, Oid *indexOid, List **attnamelist, int16 *attnums, Oid *atttypids, Oid *opclasses)
static Oid	transformFkeyCheckAttrs (Relation pkrel, int numattrs, int16 *attnums, Oid *opclasses)
static void	checkFkeyPermissions (Relation rel, int16 *attnums, int natts)
static CoercionPathType	findFkeyCast (Oid targetTypeId, Oid sourceTypeId, Oid *funcid)
static void	validateForeignKeyConstraint (char *conname, Relation rel, Relation pkrel, Oid pkindOid, Oid constraintOid)
static void	CheckAlterTableIsSafe (Relation rel)
static void	ATController (AlterTableStmt *parsetree, Relation rel, List *cmds, bool recurse, LOCKMODE lockmode, AlterTableUtilityContext *context)
static void	ATPrepCmd (List **wqueue, Relation rel, AlterTableCmd *cmd, bool recurse, bool recursing, LOCKMODE lockmode, AlterTableUtilityContext *context)
static void	ATRewriteCatalogs (List **wqueue, LOCKMODE lockmode, AlterTableUtilityContext *context)
static void	ATExecCmd (List **wqueue, AlteredTableInfo *tab, AlterTableCmd *cmd, LOCKMODE lockmode, AlterTablePass cur_pass, AlterTableUtilityContext *context)
static AlterTableCmd *	ATParseTransformCmd (List **wqueue, AlteredTableInfo *tab, Relation rel, AlterTableCmd *cmd, bool recurse, LOCKMODE lockmode, AlterTablePass cur_pass, AlterTableUtilityContext *context)
static void	ATRewriteTables (AlterTableStmt *parsetree, List **wqueue, LOCKMODE lockmode, AlterTableUtilityContext *context)
static void	ATRewriteTable (AlteredTableInfo *tab, Oid OIDNewHeap, LOCKMODE lockmode)
static AlteredTableInfo *	ATGetQueueEntry (List **wqueue, Relation rel)
static void	ATSimplePermissions (AlterTableType cmdtype, Relation rel, int allowed_targets)
static void	ATSimpleRecursion (List **wqueue, Relation rel, AlterTableCmd *cmd, bool recurse, LOCKMODE lockmode, AlterTableUtilityContext *context)
static void	ATCheckPartitionsNotInUse (Relation rel, LOCKMODE lockmode)
static void	ATTypedTableRecursion (List **wqueue, Relation rel, AlterTableCmd *cmd, LOCKMODE lockmode, AlterTableUtilityContext *context)
static List *	find_typed_table_dependencies (Oid typeOid, const char *typeName, DropBehavior behavior)
static void	ATPrepAddColumn (List **wqueue, Relation rel, bool recurse, bool recursing, bool is_view, AlterTableCmd *cmd, LOCKMODE lockmode, AlterTableUtilityContext *context)
static ObjectAddress	ATExecAddColumn (List **wqueue, AlteredTableInfo *tab, Relation rel, AlterTableCmd **cmd, bool recurse, bool recursing, LOCKMODE lockmode, AlterTablePass cur_pass, AlterTableUtilityContext *context)
static bool	check_for_column_name_collision (Relation rel, const char *colname, bool if_not_exists)
static void	add_column_datatype_dependency (Oid relid, int32 attnum, Oid typid)
static void	add_column_collation_dependency (Oid relid, int32 attnum, Oid collid)
static void	ATPrepDropNotNull (Relation rel, bool recurse, bool recursing)
static ObjectAddress	ATExecDropNotNull (Relation rel, const char *colName, LOCKMODE lockmode)
static void	ATPrepSetNotNull (List **wqueue, Relation rel, AlterTableCmd *cmd, bool recurse, bool recursing, LOCKMODE lockmode, AlterTableUtilityContext *context)
static ObjectAddress	ATExecSetNotNull (AlteredTableInfo *tab, Relation rel, const char *colName, LOCKMODE lockmode)
static void	ATExecCheckNotNull (AlteredTableInfo *tab, Relation rel, const char *colName, LOCKMODE lockmode)
static bool	NotNullImpliedByRelConstraints (Relation rel, Form_pg_attribute attr)
static bool	ConstraintImpliedByRelConstraint (Relation scanrel, List *testConstraint, List *provenConstraint)
static ObjectAddress	ATExecColumnDefault (Relation rel, const char *colName, Node *newDefault, LOCKMODE lockmode)
static ObjectAddress	ATExecCookedColumnDefault (Relation rel, AttrNumber attnum, Node *newDefault)
static ObjectAddress	ATExecAddIdentity (Relation rel, const char *colName, Node *def, LOCKMODE lockmode, bool recurse, bool recursing)
static ObjectAddress	ATExecSetIdentity (Relation rel, const char *colName, Node *def, LOCKMODE lockmode, bool recurse, bool recursing)
static ObjectAddress	ATExecDropIdentity (Relation rel, const char *colName, bool missing_ok, LOCKMODE lockmode, bool recurse, bool recursing)
static ObjectAddress	ATExecSetExpression (AlteredTableInfo *tab, Relation rel, const char *colName, Node *newExpr, LOCKMODE lockmode)
static void	ATPrepDropExpression (Relation rel, AlterTableCmd *cmd, bool recurse, bool recursing, LOCKMODE lockmode)
static ObjectAddress	ATExecDropExpression (Relation rel, const char *colName, bool missing_ok, LOCKMODE lockmode)
static ObjectAddress	ATExecSetStatistics (Relation rel, const char *colName, int16 colNum, Node *newValue, LOCKMODE lockmode)
static ObjectAddress	ATExecSetOptions (Relation rel, const char *colName, Node *options, bool isReset, LOCKMODE lockmode)
static ObjectAddress	ATExecSetStorage (Relation rel, const char *colName, Node *newValue, LOCKMODE lockmode)
static void	ATPrepDropColumn (List **wqueue, Relation rel, bool recurse, bool recursing, AlterTableCmd *cmd, LOCKMODE lockmode, AlterTableUtilityContext *context)
static ObjectAddress	ATExecDropColumn (List **wqueue, Relation rel, const char *colName, DropBehavior behavior, bool recurse, bool recursing, bool missing_ok, LOCKMODE lockmode, ObjectAddresses *addrs)
static ObjectAddress	ATExecAddIndex (AlteredTableInfo *tab, Relation rel, IndexStmt *stmt, bool is_rebuild, LOCKMODE lockmode)
static ObjectAddress	ATExecAddStatistics (AlteredTableInfo *tab, Relation rel, CreateStatsStmt *stmt, bool is_rebuild, LOCKMODE lockmode)
static ObjectAddress	ATExecAddConstraint (List **wqueue, AlteredTableInfo *tab, Relation rel, Constraint *newConstraint, bool recurse, bool is_readd, LOCKMODE lockmode)
static char *	ChooseForeignKeyConstraintNameAddition (List *colnames)
static ObjectAddress	ATExecAddIndexConstraint (AlteredTableInfo *tab, Relation rel, IndexStmt *stmt, LOCKMODE lockmode)
static ObjectAddress	ATAddCheckConstraint (List **wqueue, AlteredTableInfo *tab, Relation rel, Constraint *constr, bool recurse, bool recursing, bool is_readd, LOCKMODE lockmode)
static ObjectAddress	ATAddForeignKeyConstraint (List **wqueue, AlteredTableInfo *tab, Relation rel, Constraint *fkconstraint, bool recurse, bool recursing, LOCKMODE lockmode)
static ObjectAddress	addFkRecurseReferenced (List **wqueue, Constraint *fkconstraint, Relation rel, Relation pkrel, Oid indexOid, Oid parentConstr, int numfks, int16 *pkattnum, int16 *fkattnum, Oid *pfeqoperators, Oid *ppeqoperators, Oid *ffeqoperators, int numfkdelsetcols, int16 *fkdelsetcols, bool old_check_ok, Oid parentDelTrigger, Oid parentUpdTrigger)
static void	validateFkOnDeleteSetColumns (int numfks, const int16 *fkattnums, int numfksetcols, const int16 *fksetcolsattnums, List *fksetcols)
static void	addFkRecurseReferencing (List **wqueue, Constraint *fkconstraint, Relation rel, Relation pkrel, Oid indexOid, Oid parentConstr, int numfks, int16 *pkattnum, int16 *fkattnum, Oid *pfeqoperators, Oid *ppeqoperators, Oid *ffeqoperators, int numfkdelsetcols, int16 *fkdelsetcols, bool old_check_ok, LOCKMODE lockmode, Oid parentInsTrigger, Oid parentUpdTrigger)
static void	CloneForeignKeyConstraints (List **wqueue, Relation parentRel, Relation partitionRel)
static void	CloneFkReferenced (Relation parentRel, Relation partitionRel)
static void	CloneFkReferencing (List **wqueue, Relation parentRel, Relation partRel)
static void	createForeignKeyCheckTriggers (Oid myRelOid, Oid refRelOid, Constraint *fkconstraint, Oid constraintOid, Oid indexOid, Oid parentInsTrigger, Oid parentUpdTrigger, Oid *insertTrigOid, Oid *updateTrigOid)
static void	createForeignKeyActionTriggers (Relation rel, Oid refRelOid, Constraint *fkconstraint, Oid constraintOid, Oid indexOid, Oid parentDelTrigger, Oid parentUpdTrigger, Oid *deleteTrigOid, Oid *updateTrigOid)
static bool	tryAttachPartitionForeignKey (ForeignKeyCacheInfo *fk, Oid partRelid, Oid parentConstrOid, int numfks, AttrNumber *mapped_conkey, AttrNumber *confkey, Oid *conpfeqop, Oid parentInsTrigger, Oid parentUpdTrigger, Relation trigrel)
static void	GetForeignKeyActionTriggers (Relation trigrel, Oid conoid, Oid confrelid, Oid conrelid, Oid *deleteTriggerOid, Oid *updateTriggerOid)
static void	GetForeignKeyCheckTriggers (Relation trigrel, Oid conoid, Oid confrelid, Oid conrelid, Oid *insertTriggerOid, Oid *updateTriggerOid)
static void	ATExecDropConstraint (Relation rel, const char *constrName, DropBehavior behavior, bool recurse, bool recursing, bool missing_ok, LOCKMODE lockmode)
static void	ATPrepAlterColumnType (List **wqueue, AlteredTableInfo *tab, Relation rel, bool recurse, bool recursing, AlterTableCmd *cmd, LOCKMODE lockmode, AlterTableUtilityContext *context)
static bool	ATColumnChangeRequiresRewrite (Node *expr, AttrNumber varattno)
static ObjectAddress	ATExecAlterColumnType (AlteredTableInfo *tab, Relation rel, AlterTableCmd *cmd, LOCKMODE lockmode)
static void	RememberAllDependentForRebuilding (AlteredTableInfo *tab, AlterTableType subtype, Relation rel, AttrNumber attnum, const char *colName)
static void	RememberConstraintForRebuilding (Oid conoid, AlteredTableInfo *tab)
static void	RememberIndexForRebuilding (Oid indoid, AlteredTableInfo *tab)
static void	RememberStatisticsForRebuilding (Oid stxoid, AlteredTableInfo *tab)
static void	ATPostAlterTypeCleanup (List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode)
static void	ATPostAlterTypeParse (Oid oldId, Oid oldRelId, Oid refRelId, char *cmd, List **wqueue, LOCKMODE lockmode, bool rewrite)
static void	RebuildConstraintComment (AlteredTableInfo *tab, AlterTablePass pass, Oid objid, Relation rel, List *domname, const char *conname)
static void	TryReuseIndex (Oid oldId, IndexStmt *stmt)
static void	TryReuseForeignKey (Oid oldId, Constraint *con)
static ObjectAddress	ATExecAlterColumnGenericOptions (Relation rel, const char *colName, List *options, LOCKMODE lockmode)
static void	change_owner_fix_column_acls (Oid relationOid, Oid oldOwnerId, Oid newOwnerId)
static void	change_owner_recurse_to_sequences (Oid relationOid, Oid newOwnerId, LOCKMODE lockmode)
static ObjectAddress	ATExecClusterOn (Relation rel, const char *indexName, LOCKMODE lockmode)
static void	ATExecDropCluster (Relation rel, LOCKMODE lockmode)
static void	ATPrepSetAccessMethod (AlteredTableInfo *tab, Relation rel, const char *amname)
static void	ATExecSetAccessMethodNoStorage (Relation rel, Oid newAccessMethodId)
static void	ATPrepChangePersistence (AlteredTableInfo *tab, Relation rel, bool toLogged)
static void	ATPrepSetTableSpace (AlteredTableInfo *tab, Relation rel, const char *tablespacename, LOCKMODE lockmode)
static void	ATExecSetTableSpace (Oid tableOid, Oid newTableSpace, LOCKMODE lockmode)
static void	ATExecSetTableSpaceNoStorage (Relation rel, Oid newTableSpace)
static void	ATExecSetRelOptions (Relation rel, List *defList, AlterTableType operation, LOCKMODE lockmode)
static void	ATExecEnableDisableTrigger (Relation rel, const char *trigname, char fires_when, bool skip_system, bool recurse, LOCKMODE lockmode)
static void	ATExecEnableDisableRule (Relation rel, const char *rulename, char fires_when, LOCKMODE lockmode)
static void	ATPrepAddInherit (Relation child_rel)
static ObjectAddress	ATExecAddInherit (Relation child_rel, RangeVar *parent, LOCKMODE lockmode)
static ObjectAddress	ATExecDropInherit (Relation rel, RangeVar *parent, LOCKMODE lockmode)
static void	drop_parent_dependency (Oid relid, Oid refclassid, Oid refobjid, DependencyType deptype)
static ObjectAddress	ATExecAddOf (Relation rel, const TypeName *ofTypename, LOCKMODE lockmode)
static void	ATExecDropOf (Relation rel, LOCKMODE lockmode)
static void	ATExecReplicaIdentity (Relation rel, ReplicaIdentityStmt *stmt, LOCKMODE lockmode)
static void	ATExecGenericOptions (Relation rel, List *options)
static void	ATExecSetRowSecurity (Relation rel, bool rls)
static void	ATExecForceNoForceRowSecurity (Relation rel, bool force_rls)
static ObjectAddress	ATExecSetCompression (Relation rel, const char *column, Node *newValue, LOCKMODE lockmode)
static void	index_copy_data (Relation rel, RelFileLocator newrlocator)
static const char *	storage_name (char c)
static void	RangeVarCallbackForDropRelation (const RangeVar *rel, Oid relOid, Oid oldRelOid, void *arg)
static void	RangeVarCallbackForAlterRelation (const RangeVar *rv, Oid relid, Oid oldrelid, void *arg)
static PartitionSpec *	transformPartitionSpec (Relation rel, PartitionSpec *partspec)
static void	ComputePartitionAttrs (ParseState *pstate, Relation rel, List *partParams, AttrNumber *partattrs, List **partexprs, Oid *partopclass, Oid *partcollation, PartitionStrategy strategy)
static void	CreateInheritance (Relation child_rel, Relation parent_rel, bool ispartition)
static void	RemoveInheritance (Relation child_rel, Relation parent_rel, bool expect_detached)
static ObjectAddress	ATExecAttachPartition (List **wqueue, Relation rel, PartitionCmd *cmd, AlterTableUtilityContext *context)
static void	AttachPartitionEnsureIndexes (List **wqueue, Relation rel, Relation attachrel)
static void	QueuePartitionConstraintValidation (List **wqueue, Relation scanrel, List *partConstraint, bool validate_default)
static void	CloneRowTriggersToPartition (Relation parent, Relation partition)
static void	DetachAddConstraintIfNeeded (List **wqueue, Relation partRel)
static void	DropClonedTriggersFromPartition (Oid partitionId)
static ObjectAddress	ATExecDetachPartition (List **wqueue, AlteredTableInfo *tab, Relation rel, RangeVar *name, bool concurrent)
static void	DetachPartitionFinalize (Relation rel, Relation partRel, bool concurrent, Oid defaultPartOid)
static ObjectAddress	ATExecDetachPartitionFinalize (Relation rel, RangeVar *name)
static ObjectAddress	ATExecAttachPartitionIdx (List **wqueue, Relation parentIdx, RangeVar *name)
static void	validatePartitionedIndex (Relation partedIdx, Relation partedTbl)
static void	refuseDupeIndexAttach (Relation parentIdx, Relation partIdx, Relation partitionTbl)
static List *	GetParentedForeignKeyRefs (Relation partition)
static void	ATDetachCheckNoForeignKeyRefs (Relation partition)
static char	GetAttributeCompression (Oid atttypid, const char *compression)
static char	GetAttributeStorage (Oid atttypid, const char *storagemode)
ObjectAddress	DefineRelation (CreateStmt *stmt, char relkind, Oid ownerId, ObjectAddress *typaddress, const char *queryString)
TupleDesc	BuildDescForRelation (const List *columns)
static void	DropErrorMsgNonExistent (RangeVar *rel, char rightkind, bool missing_ok)
static void	DropErrorMsgWrongType (const char *relname, char wrongkind, char rightkind)
void	RemoveRelations (DropStmt *drop)
void	ExecuteTruncate (TruncateStmt *stmt)
void	ExecuteTruncateGuts (List *explicit_rels, List *relids, List *relids_logged, DropBehavior behavior, bool restart_seqs, bool run_as_table_owner)
void	SetRelationHasSubclass (Oid relationId, bool relhassubclass)
bool	CheckRelationTableSpaceMove (Relation rel, Oid newTableSpaceId)
void	SetRelationTableSpace (Relation rel, Oid newTableSpaceId, RelFileNumber newRelFilenumber)
static void	renameatt_check (Oid myrelid, Form_pg_class classform, bool recursing)
static AttrNumber	renameatt_internal (Oid myrelid, const char *oldattname, const char *newattname, bool recurse, bool recursing, int expected_parents, DropBehavior behavior)
static void	RangeVarCallbackForRenameAttribute (const RangeVar *rv, Oid relid, Oid oldrelid, void *arg)
ObjectAddress	renameatt (RenameStmt *stmt)
static ObjectAddress	rename_constraint_internal (Oid myrelid, Oid mytypid, const char *oldconname, const char *newconname, bool recurse, bool recursing, int expected_parents)
ObjectAddress	RenameConstraint (RenameStmt *stmt)
ObjectAddress	RenameRelation (RenameStmt *stmt)
void	RenameRelationInternal (Oid myrelid, const char *newrelname, bool is_internal, bool is_index)
void	ResetRelRewrite (Oid myrelid)
void	CheckTableNotInUse (Relation rel, const char *stmt)
Oid	AlterTableLookupRelation (AlterTableStmt *stmt, LOCKMODE lockmode)
void	AlterTable (AlterTableStmt *stmt, LOCKMODE lockmode, AlterTableUtilityContext *context)
void	AlterTableInternal (Oid relid, List *cmds, bool recurse)
LOCKMODE	AlterTableGetLockLevel (List *cmds)
static const char *	alter_table_type_to_string (AlterTableType cmdtype)
void	find_composite_type_dependencies (Oid typeOid, Relation origRelation, const char *origTypeName)
void	check_of_type (HeapTuple typetuple)
static void	SetIndexStorageProperties (Relation rel, Relation attrelation, AttrNumber attnum, bool setstorage, char newstorage, bool setcompression, char newcompression, LOCKMODE lockmode)
static Oid	CreateFKCheckTrigger (Oid myRelOid, Oid refRelOid, Constraint *fkconstraint, Oid constraintOid, Oid indexOid, Oid parentTrigOid, bool on_insert)
static void	RememberReplicaIdentityForRebuilding (Oid indoid, AlteredTableInfo *tab)
static void	RememberClusterOnForRebuilding (Oid indoid, AlteredTableInfo *tab)
void	ATExecChangeOwner (Oid relationOid, Oid newOwnerId, bool recursing, LOCKMODE lockmode)
Oid	AlterTableMoveAll (AlterTableMoveAllStmt *stmt)
static char *	decompile_conbin (HeapTuple contup, TupleDesc tupdesc)
static bool	constraints_equivalent (HeapTuple a, HeapTuple b, TupleDesc tupleDesc)
static void	MarkInheritDetached (Relation child_rel, Relation parent_rel)
static void	relation_mark_replica_identity (Relation rel, char ri_type, Oid indexOid, bool is_internal)
ObjectAddress	AlterTableNamespace (AlterObjectSchemaStmt *stmt, Oid *oldschema)
void	AlterTableNamespaceInternal (Relation rel, Oid oldNspOid, Oid nspOid, ObjectAddresses *objsMoved)
void	AlterRelationNamespaceInternal (Relation classRel, Oid relOid, Oid oldNspOid, Oid newNspOid, bool hasDependEntry, ObjectAddresses *objsMoved)
void	register_on_commit_action (Oid relid, OnCommitAction action)
void	remove_on_commit_action (Oid relid)
void	PreCommit_on_commit_actions (void)
void	AtEOXact_on_commit_actions (bool isCommit)
void	AtEOSubXact_on_commit_actions (bool isCommit, SubTransactionId mySubid, SubTransactionId parentSubid)
void	RangeVarCallbackMaintainsTable (const RangeVar *relation, Oid relId, Oid oldRelId, void *arg)
void	RangeVarCallbackOwnsRelation (const RangeVar *relation, Oid relId, Oid oldRelId, void *arg)
bool	PartConstraintImpliedByRelConstraint (Relation scanrel, List *partConstraint)
static void	RangeVarCallbackForAttachIndex (const RangeVar *rv, Oid relOid, Oid oldRelOid, void *arg)

Variables
static List *	on_commits = NIL
static const struct dropmsgstrings	dropmsgstringarray []

Macro Definition Documentation

AT_NUM_PASSES

#define AT_NUM_PASSES   (AT_PASS_MISC + 1)

Definition at line 164 of file tablecmds.c.

ATT_COMPOSITE_TYPE

#define ATT_COMPOSITE_TYPE   0x0010

Definition at line 329 of file tablecmds.c.

ATT_FOREIGN_TABLE

#define ATT_FOREIGN_TABLE   0x0020

Definition at line 330 of file tablecmds.c.

ATT_INDEX

#define ATT_INDEX   0x0008

Definition at line 328 of file tablecmds.c.

ATT_MATVIEW

#define ATT_MATVIEW   0x0004

Definition at line 327 of file tablecmds.c.

ATT_PARTITIONED_INDEX

#define ATT_PARTITIONED_INDEX   0x0040

Definition at line 331 of file tablecmds.c.

ATT_SEQUENCE

#define ATT_SEQUENCE   0x0080

Definition at line 332 of file tablecmds.c.

ATT_TABLE

#define ATT_TABLE   0x0001

Definition at line 325 of file tablecmds.c.

ATT_VIEW

#define ATT_VIEW   0x0002

Definition at line 326 of file tablecmds.c.

child_dependency_type

#define child_dependency_type

(

child_is_partition

)

((child_is_partition) ? DEPENDENCY_AUTO : DEPENDENCY_NORMAL)

Definition at line 353 of file tablecmds.c.

Typedef Documentation

AlteredTableInfo

typedef struct AlteredTableInfo AlteredTableInfo

AlterTablePass

typedef enum AlterTablePass AlterTablePass

ForeignTruncateInfo

typedef struct ForeignTruncateInfo ForeignTruncateInfo

NewColumnValue

typedef struct NewColumnValue NewColumnValue

NewConstraint

typedef struct NewConstraint NewConstraint

OnCommitItem

typedef struct OnCommitItem OnCommitItem

Enumeration Type Documentation

AlterTablePass

enum AlterTablePass

Enumerator
AT_PASS_UNSET
AT_PASS_DROP
AT_PASS_ALTER_TYPE
AT_PASS_ADD_COL
AT_PASS_SET_EXPRESSION
AT_PASS_OLD_INDEX
AT_PASS_OLD_CONSTR
AT_PASS_ADD_CONSTR
AT_PASS_COL_ATTRS
AT_PASS_ADD_INDEXCONSTR
AT_PASS_ADD_INDEX
AT_PASS_ADD_OTHERCONSTR
AT_PASS_MISC

Definition at line 146 of file tablecmds.c.

{
    AT_PASS_UNSET = -1,         /* UNSET will cause ERROR */
    AT_PASS_DROP,               /* DROP (all flavors) */
    AT_PASS_ALTER_TYPE,         /* ALTER COLUMN TYPE */
    AT_PASS_ADD_COL,            /* ADD COLUMN */
    AT_PASS_SET_EXPRESSION,     /* ALTER SET EXPRESSION */
    AT_PASS_OLD_INDEX,          /* re-add existing indexes */
    AT_PASS_OLD_CONSTR,         /* re-add existing constraints */
    /* We could support a RENAME COLUMN pass here, but not currently used */
    AT_PASS_ADD_CONSTR,         /* ADD constraints (initial examination) */
    AT_PASS_COL_ATTRS,          /* set column attributes, eg NOT NULL */
    AT_PASS_ADD_INDEXCONSTR,    /* ADD index-based constraints */
    AT_PASS_ADD_INDEX,          /* ADD indexes */
    AT_PASS_ADD_OTHERCONSTR,    /* ADD other constraints, defaults */
    AT_PASS_MISC,               /* other stuff */
} AlterTablePass;

Function Documentation

add_column_collation_dependency()

static void add_column_collation_dependency ( Oid  relid, int32  attnum, Oid  collid  )

static

Definition at line 7424 of file tablecmds.c.

{
    ObjectAddress myself,
                referenced;
 
    /* We know the default collation is pinned, so don't bother recording it */
    if (OidIsValid(collid) && collid != DEFAULT_COLLATION_OID)
    {
        myself.classId = RelationRelationId;
        myself.objectId = relid;
        myself.objectSubId = attnum;
        referenced.classId = CollationRelationId;
        referenced.objectId = collid;
        referenced.objectSubId = 0;
        recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
    }
}

References attnum, ObjectAddress::classId, collid, DEPENDENCY_NORMAL, ObjectAddress::objectId, ObjectAddress::objectSubId, OidIsValid, and recordDependencyOn().

Referenced by ATExecAddColumn(), and ATExecAlterColumnType().

add_column_datatype_dependency()

static void add_column_datatype_dependency ( Oid  relid, int32  attnum, Oid  typid  )

static

Definition at line 7406 of file tablecmds.c.

{
    ObjectAddress myself,
                referenced;
 
    myself.classId = RelationRelationId;
    myself.objectId = relid;
    myself.objectSubId = attnum;
    referenced.classId = TypeRelationId;
    referenced.objectId = typid;
    referenced.objectSubId = 0;
    recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}

References attnum, ObjectAddress::classId, DEPENDENCY_NORMAL, ObjectAddress::objectId, ObjectAddress::objectSubId, and recordDependencyOn().

Referenced by ATExecAddColumn(), and ATExecAlterColumnType().

addFkRecurseReferenced()

static ObjectAddress addFkRecurseReferenced ( List **  wqueue, Constraint *  fkconstraint, Relation  rel, Relation  pkrel, Oid  indexOid, Oid  parentConstr, int  numfks, int16 *  pkattnum, int16 *  fkattnum, Oid *  pfeqoperators, Oid *  ppeqoperators, Oid *  ffeqoperators, int  numfkdelsetcols, int16 *  fkdelsetcols, bool  old_check_ok, Oid  parentDelTrigger, Oid  parentUpdTrigger  )

static

Definition at line 10010 of file tablecmds.c.

{
    ObjectAddress address;
    Oid         constrOid;
    char       *conname;
    bool        conislocal;
    int         coninhcount;
    bool        connoinherit;
    Oid         deleteTriggerOid,
                updateTriggerOid;
 
    /*
     * Verify relkind for each referenced partition.  At the top level, this
     * is redundant with a previous check, but we need it when recursing.
     */
    if (pkrel->rd_rel->relkind != RELKIND_RELATION &&
        pkrel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("referenced relation \"%s\" is not a table",
                        RelationGetRelationName(pkrel))));
 
    /*
     * Caller supplies us with a constraint name; however, it may be used in
     * this partition, so come up with a different one in that case.
     */
    if (ConstraintNameIsUsed(CONSTRAINT_RELATION,
                             RelationGetRelid(rel),
                             fkconstraint->conname))
        conname = ChooseConstraintName(RelationGetRelationName(rel),
                                       ChooseForeignKeyConstraintNameAddition(fkconstraint->fk_attrs),
                                       "fkey",
                                       RelationGetNamespace(rel), NIL);
    else
        conname = fkconstraint->conname;
 
    if (OidIsValid(parentConstr))
    {
        conislocal = false;
        coninhcount = 1;
        connoinherit = false;
    }
    else
    {
        conislocal = true;
        coninhcount = 0;
 
        /*
         * always inherit for partitioned tables, never for legacy inheritance
         */
        connoinherit = rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE;
    }
 
    /*
     * Record the FK constraint in pg_constraint.
     */
    constrOid = CreateConstraintEntry(conname,
                                      RelationGetNamespace(rel),
                                      CONSTRAINT_FOREIGN,
                                      fkconstraint->deferrable,
                                      fkconstraint->initdeferred,
                                      fkconstraint->initially_valid,
                                      parentConstr,
                                      RelationGetRelid(rel),
                                      fkattnum,
                                      numfks,
                                      numfks,
                                      InvalidOid,   /* not a domain constraint */
                                      indexOid,
                                      RelationGetRelid(pkrel),
                                      pkattnum,
                                      pfeqoperators,
                                      ppeqoperators,
                                      ffeqoperators,
                                      numfks,
                                      fkconstraint->fk_upd_action,
                                      fkconstraint->fk_del_action,
                                      fkdelsetcols,
                                      numfkdelsetcols,
                                      fkconstraint->fk_matchtype,
                                      NULL, /* no exclusion constraint */
                                      NULL, /* no check constraint */
                                      NULL,
                                      conislocal,   /* islocal */
                                      coninhcount,  /* inhcount */
                                      connoinherit, /* conNoInherit */
                                      false);   /* is_internal */
 
    ObjectAddressSet(address, ConstraintRelationId, constrOid);
 
    /*
     * Mark the child constraint as part of the parent constraint; it must not
     * be dropped on its own.  (This constraint is deleted when the partition
     * is detached, but a special check needs to occur that the partition
     * contains no referenced values.)
     */
    if (OidIsValid(parentConstr))
    {
        ObjectAddress referenced;
 
        ObjectAddressSet(referenced, ConstraintRelationId, parentConstr);
        recordDependencyOn(&address, &referenced, DEPENDENCY_INTERNAL);
    }
 
    /* make new constraint visible, in case we add more */
    CommandCounterIncrement();
 
    /*
     * Create the action triggers that enforce the constraint.
     */
    createForeignKeyActionTriggers(rel, RelationGetRelid(pkrel),
                                   fkconstraint,
                                   constrOid, indexOid,
                                   parentDelTrigger, parentUpdTrigger,
                                   &deleteTriggerOid, &updateTriggerOid);
 
    /*
     * If the referenced table is partitioned, recurse on ourselves to handle
     * each partition.  We need one pg_constraint row created for each
     * partition in addition to the pg_constraint row for the parent table.
     */
    if (pkrel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    {
        PartitionDesc pd = RelationGetPartitionDesc(pkrel, true);
 
        for (int i = 0; i < pd->nparts; i++)
        {
            Relation    partRel;
            AttrMap    *map;
            AttrNumber *mapped_pkattnum;
            Oid         partIndexId;
 
            partRel = table_open(pd->oids[i], ShareRowExclusiveLock);
 
            /*
             * Map the attribute numbers in the referenced side of the FK
             * definition to match the partition's column layout.
             */
            map = build_attrmap_by_name_if_req(RelationGetDescr(partRel),
                                               RelationGetDescr(pkrel),
                                               false);
            if (map)
            {
                mapped_pkattnum = palloc(sizeof(AttrNumber) * numfks);
                for (int j = 0; j < numfks; j++)
                    mapped_pkattnum[j] = map->attnums[pkattnum[j] - 1];
            }
            else
                mapped_pkattnum = pkattnum;
 
            /* do the deed */
            partIndexId = index_get_partition(partRel, indexOid);
            if (!OidIsValid(partIndexId))
                elog(ERROR, "index for %u not found in partition %s",
                     indexOid, RelationGetRelationName(partRel));
            addFkRecurseReferenced(wqueue, fkconstraint, rel, partRel,
                                   partIndexId, constrOid, numfks,
                                   mapped_pkattnum, fkattnum,
                                   pfeqoperators, ppeqoperators, ffeqoperators,
                                   numfkdelsetcols, fkdelsetcols,
                                   old_check_ok,
                                   deleteTriggerOid, updateTriggerOid);
 
            /* Done -- clean up (but keep the lock) */
            table_close(partRel, NoLock);
            if (map)
            {
                pfree(mapped_pkattnum);
                free_attrmap(map);
            }
        }
    }
 
    return address;
}

References AttrMap::attnums, build_attrmap_by_name_if_req(), ChooseConstraintName(), ChooseForeignKeyConstraintNameAddition(), CommandCounterIncrement(), Constraint::conname, CONSTRAINT_RELATION, ConstraintNameIsUsed(), CreateConstraintEntry(), createForeignKeyActionTriggers(), Constraint::deferrable, DEPENDENCY_INTERNAL, elog, ereport, errcode(), errmsg(), ERROR, Constraint::fk_attrs, Constraint::fk_del_action, Constraint::fk_matchtype, Constraint::fk_upd_action, free_attrmap(), i, index_get_partition(), Constraint::initdeferred, Constraint::initially_valid, InvalidOid, j, NIL, NoLock, PartitionDescData::nparts, ObjectAddressSet, OidIsValid, PartitionDescData::oids, palloc(), pfree(), RelationData::rd_rel, recordDependencyOn(), RelationGetDescr, RelationGetNamespace, RelationGetPartitionDesc(), RelationGetRelationName, RelationGetRelid, ShareRowExclusiveLock, table_close(), and table_open().

Referenced by ATAddForeignKeyConstraint(), and CloneFkReferenced().

addFkRecurseReferencing()

static void addFkRecurseReferencing ( List **  wqueue, Constraint *  fkconstraint, Relation  rel, Relation  pkrel, Oid  indexOid, Oid  parentConstr, int  numfks, int16 *  pkattnum, int16 *  fkattnum, Oid *  pfeqoperators, Oid *  ppeqoperators, Oid *  ffeqoperators, int  numfkdelsetcols, int16 *  fkdelsetcols, bool  old_check_ok, LOCKMODE  lockmode, Oid  parentInsTrigger, Oid  parentUpdTrigger  )

static

Definition at line 10230 of file tablecmds.c.

{
    Oid         insertTriggerOid,
                updateTriggerOid;
 
    Assert(OidIsValid(parentConstr));
 
    if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("foreign key constraints are not supported on foreign tables")));
 
    /*
     * Add the check triggers to it and, if necessary, schedule it to be
     * checked in Phase 3.
     *
     * If the relation is partitioned, drill down to do it to its partitions.
     */
    createForeignKeyCheckTriggers(RelationGetRelid(rel),
                                  RelationGetRelid(pkrel),
                                  fkconstraint,
                                  parentConstr,
                                  indexOid,
                                  parentInsTrigger, parentUpdTrigger,
                                  &insertTriggerOid, &updateTriggerOid);
 
    if (rel->rd_rel->relkind == RELKIND_RELATION)
    {
        /*
         * Tell Phase 3 to check that the constraint is satisfied by existing
         * rows. We can skip this during table creation, when requested
         * explicitly by specifying NOT VALID in an ADD FOREIGN KEY command,
         * and when we're recreating a constraint following a SET DATA TYPE
         * operation that did not impugn its validity.
         */
        if (wqueue && !old_check_ok && !fkconstraint->skip_validation)
        {
            NewConstraint *newcon;
            AlteredTableInfo *tab;
 
            tab = ATGetQueueEntry(wqueue, rel);
 
            newcon = (NewConstraint *) palloc0(sizeof(NewConstraint));
            newcon->name = get_constraint_name(parentConstr);
            newcon->contype = CONSTR_FOREIGN;
            newcon->refrelid = RelationGetRelid(pkrel);
            newcon->refindid = indexOid;
            newcon->conid = parentConstr;
            newcon->qual = (Node *) fkconstraint;
 
            tab->constraints = lappend(tab->constraints, newcon);
        }
    }
    else if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    {
        PartitionDesc pd = RelationGetPartitionDesc(rel, true);
        Relation    trigrel;
 
        /*
         * Triggers of the foreign keys will be manipulated a bunch of times
         * in the loop below.  To avoid repeatedly opening/closing the trigger
         * catalog relation, we open it here and pass it to the subroutines
         * called below.
         */
        trigrel = table_open(TriggerRelationId, RowExclusiveLock);
 
        /*
         * Recurse to take appropriate action on each partition; either we
         * find an existing constraint to reparent to ours, or we create a new
         * one.
         */
        for (int i = 0; i < pd->nparts; i++)
        {
            Oid         partitionId = pd->oids[i];
            Relation    partition = table_open(partitionId, lockmode);
            List       *partFKs;
            AttrMap    *attmap;
            AttrNumber  mapped_fkattnum[INDEX_MAX_KEYS];
            bool        attached;
            char       *conname;
            Oid         constrOid;
            ObjectAddress address,
                        referenced;
            ListCell   *cell;
 
            CheckAlterTableIsSafe(partition);
 
            attmap = build_attrmap_by_name(RelationGetDescr(partition),
                                           RelationGetDescr(rel),
                                           false);
            for (int j = 0; j < numfks; j++)
                mapped_fkattnum[j] = attmap->attnums[fkattnum[j] - 1];
 
            /* Check whether an existing constraint can be repurposed */
            partFKs = copyObject(RelationGetFKeyList(partition));
            attached = false;
            foreach(cell, partFKs)
            {
                ForeignKeyCacheInfo *fk;
 
                fk = lfirst_node(ForeignKeyCacheInfo, cell);
                if (tryAttachPartitionForeignKey(fk,
                                                 partitionId,
                                                 parentConstr,
                                                 numfks,
                                                 mapped_fkattnum,
                                                 pkattnum,
                                                 pfeqoperators,
                                                 insertTriggerOid,
                                                 updateTriggerOid,
                                                 trigrel))
                {
                    attached = true;
                    break;
                }
            }
            if (attached)
            {
                table_close(partition, NoLock);
                continue;
            }
 
            /*
             * No luck finding a good constraint to reuse; create our own.
             */
            if (ConstraintNameIsUsed(CONSTRAINT_RELATION,
                                     RelationGetRelid(partition),
                                     fkconstraint->conname))
                conname = ChooseConstraintName(RelationGetRelationName(partition),
                                               ChooseForeignKeyConstraintNameAddition(fkconstraint->fk_attrs),
                                               "fkey",
                                               RelationGetNamespace(partition), NIL);
            else
                conname = fkconstraint->conname;
            constrOid =
                CreateConstraintEntry(conname,
                                      RelationGetNamespace(partition),
                                      CONSTRAINT_FOREIGN,
                                      fkconstraint->deferrable,
                                      fkconstraint->initdeferred,
                                      fkconstraint->initially_valid,
                                      parentConstr,
                                      partitionId,
                                      mapped_fkattnum,
                                      numfks,
                                      numfks,
                                      InvalidOid,
                                      indexOid,
                                      RelationGetRelid(pkrel),
                                      pkattnum,
                                      pfeqoperators,
                                      ppeqoperators,
                                      ffeqoperators,
                                      numfks,
                                      fkconstraint->fk_upd_action,
                                      fkconstraint->fk_del_action,
                                      fkdelsetcols,
                                      numfkdelsetcols,
                                      fkconstraint->fk_matchtype,
                                      NULL,
                                      NULL,
                                      NULL,
                                      false,
                                      1,
                                      false,
                                      false);
 
            /*
             * Give this constraint partition-type dependencies on the parent
             * constraint as well as the table.
             */
            ObjectAddressSet(address, ConstraintRelationId, constrOid);
            ObjectAddressSet(referenced, ConstraintRelationId, parentConstr);
            recordDependencyOn(&address, &referenced, DEPENDENCY_PARTITION_PRI);
            ObjectAddressSet(referenced, RelationRelationId, partitionId);
            recordDependencyOn(&address, &referenced, DEPENDENCY_PARTITION_SEC);
 
            /* Make all this visible before recursing */
            CommandCounterIncrement();
 
            /* call ourselves to finalize the creation and we're done */
            addFkRecurseReferencing(wqueue, fkconstraint, partition, pkrel,
                                    indexOid,
                                    constrOid,
                                    numfks,
                                    pkattnum,
                                    mapped_fkattnum,
                                    pfeqoperators,
                                    ppeqoperators,
                                    ffeqoperators,
                                    numfkdelsetcols,
                                    fkdelsetcols,
                                    old_check_ok,
                                    lockmode,
                                    insertTriggerOid,
                                    updateTriggerOid);
 
            table_close(partition, NoLock);
        }
 
        table_close(trigrel, RowExclusiveLock);
    }
}

References Assert, ATGetQueueEntry(), AttrMap::attnums, build_attrmap_by_name(), CheckAlterTableIsSafe(), ChooseConstraintName(), ChooseForeignKeyConstraintNameAddition(), CommandCounterIncrement(), NewConstraint::conid, Constraint::conname, CONSTR_FOREIGN, CONSTRAINT_RELATION, ConstraintNameIsUsed(), AlteredTableInfo::constraints, NewConstraint::contype, copyObject, CreateConstraintEntry(), createForeignKeyCheckTriggers(), Constraint::deferrable, DEPENDENCY_PARTITION_PRI, DEPENDENCY_PARTITION_SEC, ereport, errcode(), errmsg(), ERROR, Constraint::fk_attrs, Constraint::fk_del_action, Constraint::fk_matchtype, Constraint::fk_upd_action, get_constraint_name(), i, INDEX_MAX_KEYS, Constraint::initdeferred, Constraint::initially_valid, InvalidOid, j, lappend(), lfirst_node, NewConstraint::name, NIL, NoLock, PartitionDescData::nparts, ObjectAddressSet, OidIsValid, PartitionDescData::oids, palloc0(), NewConstraint::qual, RelationData::rd_rel, recordDependencyOn(), NewConstraint::refindid, NewConstraint::refrelid, RelationGetDescr, RelationGetFKeyList(), RelationGetNamespace, RelationGetPartitionDesc(), RelationGetRelationName, RelationGetRelid, RowExclusiveLock, Constraint::skip_validation, table_close(), table_open(), and tryAttachPartitionForeignKey().

Referenced by ATAddForeignKeyConstraint(), and CloneFkReferencing().

alter_table_type_to_string()

static const char* alter_table_type_to_string ( AlterTableType  cmdtype )

static

Definition at line 6337 of file tablecmds.c.

{
    switch (cmdtype)
    {
        case AT_AddColumn:
        case AT_AddColumnToView:
            return "ADD COLUMN";
        case AT_ColumnDefault:
        case AT_CookedColumnDefault:
            return "ALTER COLUMN ... SET DEFAULT";
        case AT_DropNotNull:
            return "ALTER COLUMN ... DROP NOT NULL";
        case AT_SetNotNull:
            return "ALTER COLUMN ... SET NOT NULL";
        case AT_SetExpression:
            return "ALTER COLUMN ... SET EXPRESSION";
        case AT_DropExpression:
            return "ALTER COLUMN ... DROP EXPRESSION";
        case AT_CheckNotNull:
            return NULL;        /* not real grammar */
        case AT_SetStatistics:
            return "ALTER COLUMN ... SET STATISTICS";
        case AT_SetOptions:
            return "ALTER COLUMN ... SET";
        case AT_ResetOptions:
            return "ALTER COLUMN ... RESET";
        case AT_SetStorage:
            return "ALTER COLUMN ... SET STORAGE";
        case AT_SetCompression:
            return "ALTER COLUMN ... SET COMPRESSION";
        case AT_DropColumn:
            return "DROP COLUMN";
        case AT_AddIndex:
        case AT_ReAddIndex:
            return NULL;        /* not real grammar */
        case AT_AddConstraint:
        case AT_ReAddConstraint:
        case AT_ReAddDomainConstraint:
        case AT_AddIndexConstraint:
            return "ADD CONSTRAINT";
        case AT_AlterConstraint:
            return "ALTER CONSTRAINT";
        case AT_ValidateConstraint:
            return "VALIDATE CONSTRAINT";
        case AT_DropConstraint:
            return "DROP CONSTRAINT";
        case AT_ReAddComment:
            return NULL;        /* not real grammar */
        case AT_AlterColumnType:
            return "ALTER COLUMN ... SET DATA TYPE";
        case AT_AlterColumnGenericOptions:
            return "ALTER COLUMN ... OPTIONS";
        case AT_ChangeOwner:
            return "OWNER TO";
        case AT_ClusterOn:
            return "CLUSTER ON";
        case AT_DropCluster:
            return "SET WITHOUT CLUSTER";
        case AT_SetAccessMethod:
            return "SET ACCESS METHOD";
        case AT_SetLogged:
            return "SET LOGGED";
        case AT_SetUnLogged:
            return "SET UNLOGGED";
        case AT_DropOids:
            return "SET WITHOUT OIDS";
        case AT_SetTableSpace:
            return "SET TABLESPACE";
        case AT_SetRelOptions:
            return "SET";
        case AT_ResetRelOptions:
            return "RESET";
        case AT_ReplaceRelOptions:
            return NULL;        /* not real grammar */
        case AT_EnableTrig:
            return "ENABLE TRIGGER";
        case AT_EnableAlwaysTrig:
            return "ENABLE ALWAYS TRIGGER";
        case AT_EnableReplicaTrig:
            return "ENABLE REPLICA TRIGGER";
        case AT_DisableTrig:
            return "DISABLE TRIGGER";
        case AT_EnableTrigAll:
            return "ENABLE TRIGGER ALL";
        case AT_DisableTrigAll:
            return "DISABLE TRIGGER ALL";
        case AT_EnableTrigUser:
            return "ENABLE TRIGGER USER";
        case AT_DisableTrigUser:
            return "DISABLE TRIGGER USER";
        case AT_EnableRule:
            return "ENABLE RULE";
        case AT_EnableAlwaysRule:
            return "ENABLE ALWAYS RULE";
        case AT_EnableReplicaRule:
            return "ENABLE REPLICA RULE";
        case AT_DisableRule:
            return "DISABLE RULE";
        case AT_AddInherit:
            return "INHERIT";
        case AT_DropInherit:
            return "NO INHERIT";
        case AT_AddOf:
            return "OF";
        case AT_DropOf:
            return "NOT OF";
        case AT_ReplicaIdentity:
            return "REPLICA IDENTITY";
        case AT_EnableRowSecurity:
            return "ENABLE ROW SECURITY";
        case AT_DisableRowSecurity:
            return "DISABLE ROW SECURITY";
        case AT_ForceRowSecurity:
            return "FORCE ROW SECURITY";
        case AT_NoForceRowSecurity:
            return "NO FORCE ROW SECURITY";
        case AT_GenericOptions:
            return "OPTIONS";
        case AT_AttachPartition:
            return "ATTACH PARTITION";
        case AT_DetachPartition:
            return "DETACH PARTITION";
        case AT_DetachPartitionFinalize:
            return "DETACH PARTITION ... FINALIZE";
        case AT_AddIdentity:
            return "ALTER COLUMN ... ADD IDENTITY";
        case AT_SetIdentity:
            return "ALTER COLUMN ... SET";
        case AT_DropIdentity:
            return "ALTER COLUMN ... DROP IDENTITY";
        case AT_ReAddStatistics:
            return NULL;        /* not real grammar */
    }
 
    return NULL;
}

References AT_AddColumn, AT_AddColumnToView, AT_AddConstraint, AT_AddIdentity, AT_AddIndex, AT_AddIndexConstraint, AT_AddInherit, AT_AddOf, AT_AlterColumnGenericOptions, AT_AlterColumnType, AT_AlterConstraint, AT_AttachPartition, AT_ChangeOwner, AT_CheckNotNull, AT_ClusterOn, AT_ColumnDefault, AT_CookedColumnDefault, AT_DetachPartition, AT_DetachPartitionFinalize, AT_DisableRowSecurity, AT_DisableRule, AT_DisableTrig, AT_DisableTrigAll, AT_DisableTrigUser, AT_DropCluster, AT_DropColumn, AT_DropConstraint, AT_DropExpression, AT_DropIdentity, AT_DropInherit, AT_DropNotNull, AT_DropOf, AT_DropOids, AT_EnableAlwaysRule, AT_EnableAlwaysTrig, AT_EnableReplicaRule, AT_EnableReplicaTrig, AT_EnableRowSecurity, AT_EnableRule, AT_EnableTrig, AT_EnableTrigAll, AT_EnableTrigUser, AT_ForceRowSecurity, AT_GenericOptions, AT_NoForceRowSecurity, AT_ReAddComment, AT_ReAddConstraint, AT_ReAddDomainConstraint, AT_ReAddIndex, AT_ReAddStatistics, AT_ReplaceRelOptions, AT_ReplicaIdentity, AT_ResetOptions, AT_ResetRelOptions, AT_SetAccessMethod, AT_SetCompression, AT_SetExpression, AT_SetIdentity, AT_SetLogged, AT_SetNotNull, AT_SetOptions, AT_SetRelOptions, AT_SetStatistics, AT_SetStorage, AT_SetTableSpace, AT_SetUnLogged, and AT_ValidateConstraint.

Referenced by ATSimplePermissions().

AlterIndexNamespaces()

static void AlterIndexNamespaces ( Relation  classRel, Relation  rel, Oid  oldNspOid, Oid  newNspOid, ObjectAddresses *  objsMoved  )

static

Definition at line 17194 of file tablecmds.c.

{
    List       *indexList;
    ListCell   *l;
 
    indexList = RelationGetIndexList(rel);
 
    foreach(l, indexList)
    {
        Oid         indexOid = lfirst_oid(l);
        ObjectAddress thisobj;
 
        thisobj.classId = RelationRelationId;
        thisobj.objectId = indexOid;
        thisobj.objectSubId = 0;
 
        /*
         * Note: currently, the index will not have its own dependency on the
         * namespace, so we don't need to do changeDependencyFor(). There's no
         * row type in pg_type, either.
         *
         * XXX this objsMoved test may be pointless -- surely we have a single
         * dependency link from a relation to each index?
         */
        if (!object_address_present(&thisobj, objsMoved))
        {
            AlterRelationNamespaceInternal(classRel, indexOid,
                                           oldNspOid, newNspOid,
                                           false, objsMoved);
            add_exact_object_address(&thisobj, objsMoved);
        }
    }
 
    list_free(indexList);
}

References add_exact_object_address(), AlterRelationNamespaceInternal(), ObjectAddress::classId, lfirst_oid, list_free(), object_address_present(), ObjectAddress::objectId, ObjectAddress::objectSubId, and RelationGetIndexList().

Referenced by AlterTableNamespaceInternal().

AlterRelationNamespaceInternal()

void AlterRelationNamespaceInternal	(	Relation	classRel,
		Oid	relOid,
		Oid	oldNspOid,
		Oid	newNspOid,
		bool	hasDependEntry,
		ObjectAddresses *	objsMoved
	)

Definition at line 17124 of file tablecmds.c.

{
    HeapTuple   classTup;
    Form_pg_class classForm;
    ObjectAddress thisobj;
    bool        already_done = false;
 
    classTup = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relOid));
    if (!HeapTupleIsValid(classTup))
        elog(ERROR, "cache lookup failed for relation %u", relOid);
    classForm = (Form_pg_class) GETSTRUCT(classTup);
 
    Assert(classForm->relnamespace == oldNspOid);
 
    thisobj.classId = RelationRelationId;
    thisobj.objectId = relOid;
    thisobj.objectSubId = 0;
 
    /*
     * If the object has already been moved, don't move it again.  If it's
     * already in the right place, don't move it, but still fire the object
     * access hook.
     */
    already_done = object_address_present(&thisobj, objsMoved);
    if (!already_done && oldNspOid != newNspOid)
    {
        /* check for duplicate name (more friendly than unique-index failure) */
        if (get_relname_relid(NameStr(classForm->relname),
                              newNspOid) != InvalidOid)
            ereport(ERROR,
                    (errcode(ERRCODE_DUPLICATE_TABLE),
                     errmsg("relation \"%s\" already exists in schema \"%s\"",
                            NameStr(classForm->relname),
                            get_namespace_name(newNspOid))));
 
        /* classTup is a copy, so OK to scribble on */
        classForm->relnamespace = newNspOid;
 
        CatalogTupleUpdate(classRel, &classTup->t_self, classTup);
 
        /* Update dependency on schema if caller said so */
        if (hasDependEntry &&
            changeDependencyFor(RelationRelationId,
                                relOid,
                                NamespaceRelationId,
                                oldNspOid,
                                newNspOid) != 1)
            elog(ERROR, "could not change schema dependency for relation \"%s\"",
                 NameStr(classForm->relname));
    }
    if (!already_done)
    {
        add_exact_object_address(&thisobj, objsMoved);
 
        InvokeObjectPostAlterHook(RelationRelationId, relOid, 0);
    }
 
    heap_freetuple(classTup);
}

References add_exact_object_address(), Assert, CatalogTupleUpdate(), changeDependencyFor(), ObjectAddress::classId, elog, ereport, errcode(), errmsg(), ERROR, get_namespace_name(), get_relname_relid(), GETSTRUCT, heap_freetuple(), HeapTupleIsValid, InvalidOid, InvokeObjectPostAlterHook, NameStr, object_address_present(), ObjectAddress::objectId, ObjectIdGetDatum(), ObjectAddress::objectSubId, SearchSysCacheCopy1, and HeapTupleData::t_self.

Referenced by AlterIndexNamespaces(), AlterSeqNamespaces(), AlterTableNamespaceInternal(), and AlterTypeNamespaceInternal().

AlterSeqNamespaces()

static void AlterSeqNamespaces ( Relation  classRel, Relation  rel, Oid  oldNspOid, Oid  newNspOid, ObjectAddresses *  objsMoved, LOCKMODE  lockmode  )

static

Definition at line 17239 of file tablecmds.c.

{
    Relation    depRel;
    SysScanDesc scan;
    ScanKeyData key[2];
    HeapTuple   tup;
 
    /*
     * SERIAL sequences are those having an auto dependency on one of the
     * table's columns (we don't care *which* column, exactly).
     */
    depRel = table_open(DependRelationId, AccessShareLock);
 
    ScanKeyInit(&key[0],
                Anum_pg_depend_refclassid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(RelationRelationId));
    ScanKeyInit(&key[1],
                Anum_pg_depend_refobjid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(RelationGetRelid(rel)));
    /* we leave refobjsubid unspecified */
 
    scan = systable_beginscan(depRel, DependReferenceIndexId, true,
                              NULL, 2, key);
 
    while (HeapTupleIsValid(tup = systable_getnext(scan)))
    {
        Form_pg_depend depForm = (Form_pg_depend) GETSTRUCT(tup);
        Relation    seqRel;
 
        /* skip dependencies other than auto dependencies on columns */
        if (depForm->refobjsubid == 0 ||
            depForm->classid != RelationRelationId ||
            depForm->objsubid != 0 ||
            !(depForm->deptype == DEPENDENCY_AUTO || depForm->deptype == DEPENDENCY_INTERNAL))
            continue;
 
        /* Use relation_open just in case it's an index */
        seqRel = relation_open(depForm->objid, lockmode);
 
        /* skip non-sequence relations */
        if (RelationGetForm(seqRel)->relkind != RELKIND_SEQUENCE)
        {
            /* No need to keep the lock */
            relation_close(seqRel, lockmode);
            continue;
        }
 
        /* Fix the pg_class and pg_depend entries */
        AlterRelationNamespaceInternal(classRel, depForm->objid,
                                       oldNspOid, newNspOid,
                                       true, objsMoved);
 
        /*
         * Sequences used to have entries in pg_type, but no longer do.  If we
         * ever re-instate that, we'll need to move the pg_type entry to the
         * new namespace, too (using AlterTypeNamespaceInternal).
         */
        Assert(RelationGetForm(seqRel)->reltype == InvalidOid);
 
        /* Now we can close it.  Keep the lock till end of transaction. */
        relation_close(seqRel, NoLock);
    }
 
    systable_endscan(scan);
 
    relation_close(depRel, AccessShareLock);
}

References AccessShareLock, AlterRelationNamespaceInternal(), Assert, BTEqualStrategyNumber, DEPENDENCY_AUTO, DEPENDENCY_INTERNAL, GETSTRUCT, HeapTupleIsValid, InvalidOid, sort-test::key, NoLock, ObjectIdGetDatum(), relation_close(), relation_open(), RelationGetForm, RelationGetRelid, ScanKeyInit(), systable_beginscan(), systable_endscan(), systable_getnext(), and table_open().

Referenced by AlterTableNamespaceInternal().

AlterTable()

void AlterTable	(	AlterTableStmt *	stmt,
		LOCKMODE	lockmode,
		AlterTableUtilityContext *	context
	)

Definition at line 4358 of file tablecmds.c.

{
    Relation    rel;
 
    /* Caller is required to provide an adequate lock. */
    rel = relation_open(context->relid, NoLock);
 
    CheckAlterTableIsSafe(rel);
 
    ATController(stmt, rel, stmt->cmds, stmt->relation->inh, lockmode, context);
}

References ATController(), CheckAlterTableIsSafe(), context, NoLock, relation_open(), and stmt.

Referenced by ProcessUtilitySlow().

AlterTableGetLockLevel()

LOCKMODE AlterTableGetLockLevel

(

List *

cmds

)

Definition at line 4432 of file tablecmds.c.

{
    /*
     * This only works if we read catalog tables using MVCC snapshots.
     */
    ListCell   *lcmd;
    LOCKMODE    lockmode = ShareUpdateExclusiveLock;
 
    foreach(lcmd, cmds)
    {
        AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
        LOCKMODE    cmd_lockmode = AccessExclusiveLock; /* default for compiler */
 
        switch (cmd->subtype)
        {
                /*
                 * These subcommands rewrite the heap, so require full locks.
                 */
            case AT_AddColumn:  /* may rewrite heap, in some cases and visible
                                 * to SELECT */
            case AT_SetAccessMethod:    /* must rewrite heap */
            case AT_SetTableSpace:  /* must rewrite heap */
            case AT_AlterColumnType:    /* must rewrite heap */
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * These subcommands may require addition of toast tables. If
                 * we add a toast table to a table currently being scanned, we
                 * might miss data added to the new toast table by concurrent
                 * insert transactions.
                 */
            case AT_SetStorage: /* may add toast tables, see
                                 * ATRewriteCatalogs() */
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * Removing constraints can affect SELECTs that have been
                 * optimized assuming the constraint holds true. See also
                 * CloneFkReferenced.
                 */
            case AT_DropConstraint: /* as DROP INDEX */
            case AT_DropNotNull:    /* may change some SQL plans */
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * Subcommands that may be visible to concurrent SELECTs
                 */
            case AT_DropColumn: /* change visible to SELECT */
            case AT_AddColumnToView:    /* CREATE VIEW */
            case AT_DropOids:   /* used to equiv to DropColumn */
            case AT_EnableAlwaysRule:   /* may change SELECT rules */
            case AT_EnableReplicaRule:  /* may change SELECT rules */
            case AT_EnableRule: /* may change SELECT rules */
            case AT_DisableRule:    /* may change SELECT rules */
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * Changing owner may remove implicit SELECT privileges
                 */
            case AT_ChangeOwner:    /* change visible to SELECT */
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * Changing foreign table options may affect optimization.
                 */
            case AT_GenericOptions:
            case AT_AlterColumnGenericOptions:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * These subcommands affect write operations only.
                 */
            case AT_EnableTrig:
            case AT_EnableAlwaysTrig:
            case AT_EnableReplicaTrig:
            case AT_EnableTrigAll:
            case AT_EnableTrigUser:
            case AT_DisableTrig:
            case AT_DisableTrigAll:
            case AT_DisableTrigUser:
                cmd_lockmode = ShareRowExclusiveLock;
                break;
 
                /*
                 * These subcommands affect write operations only. XXX
                 * Theoretically, these could be ShareRowExclusiveLock.
                 */
            case AT_ColumnDefault:
            case AT_CookedColumnDefault:
            case AT_AlterConstraint:
            case AT_AddIndex:   /* from ADD CONSTRAINT */
            case AT_AddIndexConstraint:
            case AT_ReplicaIdentity:
            case AT_SetNotNull:
            case AT_EnableRowSecurity:
            case AT_DisableRowSecurity:
            case AT_ForceRowSecurity:
            case AT_NoForceRowSecurity:
            case AT_AddIdentity:
            case AT_DropIdentity:
            case AT_SetIdentity:
            case AT_SetExpression:
            case AT_DropExpression:
            case AT_SetCompression:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
            case AT_AddConstraint:
            case AT_ReAddConstraint:    /* becomes AT_AddConstraint */
            case AT_ReAddDomainConstraint:  /* becomes AT_AddConstraint */
                if (IsA(cmd->def, Constraint))
                {
                    Constraint *con = (Constraint *) cmd->def;
 
                    switch (con->contype)
                    {
                        case CONSTR_EXCLUSION:
                        case CONSTR_PRIMARY:
                        case CONSTR_UNIQUE:
 
                            /*
                             * Cases essentially the same as CREATE INDEX. We
                             * could reduce the lock strength to ShareLock if
                             * we can work out how to allow concurrent catalog
                             * updates. XXX Might be set down to
                             * ShareRowExclusiveLock but requires further
                             * analysis.
                             */
                            cmd_lockmode = AccessExclusiveLock;
                            break;
                        case CONSTR_FOREIGN:
 
                            /*
                             * We add triggers to both tables when we add a
                             * Foreign Key, so the lock level must be at least
                             * as strong as CREATE TRIGGER.
                             */
                            cmd_lockmode = ShareRowExclusiveLock;
                            break;
 
                        default:
                            cmd_lockmode = AccessExclusiveLock;
                    }
                }
                break;
 
                /*
                 * These subcommands affect inheritance behaviour. Queries
                 * started before us will continue to see the old inheritance
                 * behaviour, while queries started after we commit will see
                 * new behaviour. No need to prevent reads or writes to the
                 * subtable while we hook it up though. Changing the TupDesc
                 * may be a problem, so keep highest lock.
                 */
            case AT_AddInherit:
            case AT_DropInherit:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * These subcommands affect implicit row type conversion. They
                 * have affects similar to CREATE/DROP CAST on queries. don't
                 * provide for invalidating parse trees as a result of such
                 * changes, so we keep these at AccessExclusiveLock.
                 */
            case AT_AddOf:
            case AT_DropOf:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * Only used by CREATE OR REPLACE VIEW which must conflict
                 * with an SELECTs currently using the view.
                 */
            case AT_ReplaceRelOptions:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
                /*
                 * These subcommands affect general strategies for performance
                 * and maintenance, though don't change the semantic results
                 * from normal data reads and writes. Delaying an ALTER TABLE
                 * behind currently active writes only delays the point where
                 * the new strategy begins to take effect, so there is no
                 * benefit in waiting. In this case the minimum restriction
                 * applies: we don't currently allow concurrent catalog
                 * updates.
                 */
            case AT_SetStatistics:  /* Uses MVCC in getTableAttrs() */
            case AT_ClusterOn:  /* Uses MVCC in getIndexes() */
            case AT_DropCluster:    /* Uses MVCC in getIndexes() */
            case AT_SetOptions: /* Uses MVCC in getTableAttrs() */
            case AT_ResetOptions:   /* Uses MVCC in getTableAttrs() */
                cmd_lockmode = ShareUpdateExclusiveLock;
                break;
 
            case AT_SetLogged:
            case AT_SetUnLogged:
                cmd_lockmode = AccessExclusiveLock;
                break;
 
            case AT_ValidateConstraint: /* Uses MVCC in getConstraints() */
                cmd_lockmode = ShareUpdateExclusiveLock;
                break;
 
                /*
                 * Rel options are more complex than first appears. Options
                 * are set here for tables, views and indexes; for historical
                 * reasons these can all be used with ALTER TABLE, so we can't
                 * decide between them using the basic grammar.
                 */
            case AT_SetRelOptions:  /* Uses MVCC in getIndexes() and
                                     * getTables() */
            case AT_ResetRelOptions:    /* Uses MVCC in getIndexes() and
                                         * getTables() */
                cmd_lockmode = AlterTableGetRelOptionsLockLevel((List *) cmd->def);
                break;
 
            case AT_AttachPartition:
                cmd_lockmode = ShareUpdateExclusiveLock;
                break;
 
            case AT_DetachPartition:
                if (((PartitionCmd *) cmd->def)->concurrent)
                    cmd_lockmode = ShareUpdateExclusiveLock;
                else
                    cmd_lockmode = AccessExclusiveLock;
                break;
 
            case AT_DetachPartitionFinalize:
                cmd_lockmode = ShareUpdateExclusiveLock;
                break;
 
            case AT_CheckNotNull:
 
                /*
                 * This only examines the table's schema; but lock must be
                 * strong enough to prevent concurrent DROP NOT NULL.
                 */
                cmd_lockmode = AccessShareLock;
                break;
 
            default:            /* oops */
                elog(ERROR, "unrecognized alter table type: %d",
                     (int) cmd->subtype);
                break;
        }
 
        /*
         * Take the greatest lockmode from any subcommand
         */
        if (cmd_lockmode > lockmode)
            lockmode = cmd_lockmode;
    }
 
    return lockmode;
}

References AccessExclusiveLock, AccessShareLock, AlterTableGetRelOptionsLockLevel(), AT_AddColumn, AT_AddColumnToView, AT_AddConstraint, AT_AddIdentity, AT_AddIndex, AT_AddIndexConstraint, AT_AddInherit, AT_AddOf, AT_AlterColumnGenericOptions, AT_AlterColumnType, AT_AlterConstraint, AT_AttachPartition, AT_ChangeOwner, AT_CheckNotNull, AT_ClusterOn, AT_ColumnDefault, AT_CookedColumnDefault, AT_DetachPartition, AT_DetachPartitionFinalize, AT_DisableRowSecurity, AT_DisableRule, AT_DisableTrig, AT_DisableTrigAll, AT_DisableTrigUser, AT_DropCluster, AT_DropColumn, AT_DropConstraint, AT_DropExpression, AT_DropIdentity, AT_DropInherit, AT_DropNotNull, AT_DropOf, AT_DropOids, AT_EnableAlwaysRule, AT_EnableAlwaysTrig, AT_EnableReplicaRule, AT_EnableReplicaTrig, AT_EnableRowSecurity, AT_EnableRule, AT_EnableTrig, AT_EnableTrigAll, AT_EnableTrigUser, AT_ForceRowSecurity, AT_GenericOptions, AT_NoForceRowSecurity, AT_ReAddConstraint, AT_ReAddDomainConstraint, AT_ReplaceRelOptions, AT_ReplicaIdentity, AT_ResetOptions, AT_ResetRelOptions, AT_SetAccessMethod, AT_SetCompression, AT_SetExpression, AT_SetIdentity, AT_SetLogged, AT_SetNotNull, AT_SetOptions, AT_SetRelOptions, AT_SetStatistics, AT_SetStorage, AT_SetTableSpace, AT_SetUnLogged, AT_ValidateConstraint, CONSTR_EXCLUSION, CONSTR_FOREIGN, CONSTR_PRIMARY, CONSTR_UNIQUE, Constraint::contype, AlterTableCmd::def, elog, ERROR, IsA, lfirst, ShareRowExclusiveLock, ShareUpdateExclusiveLock, and AlterTableCmd::subtype.

Referenced by AlterTableInternal(), and ProcessUtilitySlow().

AlterTableInternal()

void AlterTableInternal	(	Oid	relid,
		List *	cmds,
		bool	recurse
	)

Definition at line 4387 of file tablecmds.c.

{
    Relation    rel;
    LOCKMODE    lockmode = AlterTableGetLockLevel(cmds);
 
    rel = relation_open(relid, lockmode);
 
    EventTriggerAlterTableRelid(relid);
 
    ATController(NULL, rel, cmds, recurse, lockmode, NULL);
}

References AlterTableGetLockLevel(), ATController(), EventTriggerAlterTableRelid(), and relation_open().

Referenced by AlterTableMoveAll(), and DefineVirtualRelation().

AlterTableLookupRelation()

Oid AlterTableLookupRelation	(	AlterTableStmt *	stmt,
		LOCKMODE	lockmode
	)

Definition at line 4299 of file tablecmds.c.

{
    return RangeVarGetRelidExtended(stmt->relation, lockmode,
                                    stmt->missing_ok ? RVR_MISSING_OK : 0,
                                    RangeVarCallbackForAlterRelation,
                                    (void *) stmt);
}

References RangeVarCallbackForAlterRelation(), RangeVarGetRelidExtended(), RVR_MISSING_OK, and stmt.

Referenced by ProcessUtilitySlow().

AlterTableMoveAll()

Oid AlterTableMoveAll

(

AlterTableMoveAllStmt *

stmt

)

Definition at line 15191 of file tablecmds.c.

{
    List       *relations = NIL;
    ListCell   *l;
    ScanKeyData key[1];
    Relation    rel;
    TableScanDesc scan;
    HeapTuple   tuple;
    Oid         orig_tablespaceoid;
    Oid         new_tablespaceoid;
    List       *role_oids = roleSpecsToIds(stmt->roles);
 
    /* Ensure we were not asked to move something we can't */
    if (stmt->objtype != OBJECT_TABLE && stmt->objtype != OBJECT_INDEX &&
        stmt->objtype != OBJECT_MATVIEW)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("only tables, indexes, and materialized views exist in tablespaces")));
 
    /* Get the orig and new tablespace OIDs */
    orig_tablespaceoid = get_tablespace_oid(stmt->orig_tablespacename, false);
    new_tablespaceoid = get_tablespace_oid(stmt->new_tablespacename, false);
 
    /* Can't move shared relations in to or out of pg_global */
    /* This is also checked by ATExecSetTableSpace, but nice to stop earlier */
    if (orig_tablespaceoid == GLOBALTABLESPACE_OID ||
        new_tablespaceoid == GLOBALTABLESPACE_OID)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("cannot move relations in to or out of pg_global tablespace")));
 
    /*
     * Must have CREATE rights on the new tablespace, unless it is the
     * database default tablespace (which all users implicitly have CREATE
     * rights on).
     */
    if (OidIsValid(new_tablespaceoid) && new_tablespaceoid != MyDatabaseTableSpace)
    {
        AclResult   aclresult;
 
        aclresult = object_aclcheck(TableSpaceRelationId, new_tablespaceoid, GetUserId(),
                                    ACL_CREATE);
        if (aclresult != ACLCHECK_OK)
            aclcheck_error(aclresult, OBJECT_TABLESPACE,
                           get_tablespace_name(new_tablespaceoid));
    }
 
    /*
     * Now that the checks are done, check if we should set either to
     * InvalidOid because it is our database's default tablespace.
     */
    if (orig_tablespaceoid == MyDatabaseTableSpace)
        orig_tablespaceoid = InvalidOid;
 
    if (new_tablespaceoid == MyDatabaseTableSpace)
        new_tablespaceoid = InvalidOid;
 
    /* no-op */
    if (orig_tablespaceoid == new_tablespaceoid)
        return new_tablespaceoid;
 
    /*
     * Walk the list of objects in the tablespace and move them. This will
     * only find objects in our database, of course.
     */
    ScanKeyInit(&key[0],
                Anum_pg_class_reltablespace,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(orig_tablespaceoid));
 
    rel = table_open(RelationRelationId, AccessShareLock);
    scan = table_beginscan_catalog(rel, 1, key);
    while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
    {
        Form_pg_class relForm = (Form_pg_class) GETSTRUCT(tuple);
        Oid         relOid = relForm->oid;
 
        /*
         * Do not move objects in pg_catalog as part of this, if an admin
         * really wishes to do so, they can issue the individual ALTER
         * commands directly.
         *
         * Also, explicitly avoid any shared tables, temp tables, or TOAST
         * (TOAST will be moved with the main table).
         */
        if (IsCatalogNamespace(relForm->relnamespace) ||
            relForm->relisshared ||
            isAnyTempNamespace(relForm->relnamespace) ||
            IsToastNamespace(relForm->relnamespace))
            continue;
 
        /* Only move the object type requested */
        if ((stmt->objtype == OBJECT_TABLE &&
             relForm->relkind != RELKIND_RELATION &&
             relForm->relkind != RELKIND_PARTITIONED_TABLE) ||
            (stmt->objtype == OBJECT_INDEX &&
             relForm->relkind != RELKIND_INDEX &&
             relForm->relkind != RELKIND_PARTITIONED_INDEX) ||
            (stmt->objtype == OBJECT_MATVIEW &&
             relForm->relkind != RELKIND_MATVIEW))
            continue;
 
        /* Check if we are only moving objects owned by certain roles */
        if (role_oids != NIL && !list_member_oid(role_oids, relForm->relowner))
            continue;
 
        /*
         * Handle permissions-checking here since we are locking the tables
         * and also to avoid doing a bunch of work only to fail part-way. Note
         * that permissions will also be checked by AlterTableInternal().
         *
         * Caller must be considered an owner on the table to move it.
         */
        if (!object_ownercheck(RelationRelationId, relOid, GetUserId()))
            aclcheck_error(ACLCHECK_NOT_OWNER, get_relkind_objtype(get_rel_relkind(relOid)),
                           NameStr(relForm->relname));
 
        if (stmt->nowait &&
            !ConditionalLockRelationOid(relOid, AccessExclusiveLock))
            ereport(ERROR,
                    (errcode(ERRCODE_OBJECT_IN_USE),
                     errmsg("aborting because lock on relation \"%s.%s\" is not available",
                            get_namespace_name(relForm->relnamespace),
                            NameStr(relForm->relname))));
        else
            LockRelationOid(relOid, AccessExclusiveLock);
 
        /* Add to our list of objects to move */
        relations = lappend_oid(relations, relOid);
    }
 
    table_endscan(scan);
    table_close(rel, AccessShareLock);
 
    if (relations == NIL)
        ereport(NOTICE,
                (errcode(ERRCODE_NO_DATA_FOUND),
                 errmsg("no matching relations in tablespace \"%s\" found",
                        orig_tablespaceoid == InvalidOid ? "(database default)" :
                        get_tablespace_name(orig_tablespaceoid))));
 
    /* Everything is locked, loop through and move all of the relations. */
    foreach(l, relations)
    {
        List       *cmds = NIL;
        AlterTableCmd *cmd = makeNode(AlterTableCmd);
 
        cmd->subtype = AT_SetTableSpace;
        cmd->name = stmt->new_tablespacename;
 
        cmds = lappend(cmds, cmd);
 
        EventTriggerAlterTableStart((Node *) stmt);
        /* OID is set by AlterTableInternal */
        AlterTableInternal(lfirst_oid(l), cmds, false);
        EventTriggerAlterTableEnd();
    }
 
    return new_tablespaceoid;
}

References AccessExclusiveLock, AccessShareLock, ACL_CREATE, aclcheck_error(), ACLCHECK_NOT_OWNER, ACLCHECK_OK, AlterTableInternal(), AT_SetTableSpace, BTEqualStrategyNumber, ConditionalLockRelationOid(), ereport, errcode(), errmsg(), ERROR, EventTriggerAlterTableEnd(), EventTriggerAlterTableStart(), ForwardScanDirection, get_namespace_name(), get_rel_relkind(), get_relkind_objtype(), get_tablespace_name(), get_tablespace_oid(), GETSTRUCT, GetUserId(), heap_getnext(), InvalidOid, isAnyTempNamespace(), IsCatalogNamespace(), IsToastNamespace(), sort-test::key, lappend(), lappend_oid(), lfirst_oid, list_member_oid(), LockRelationOid(), makeNode, MyDatabaseTableSpace, AlterTableCmd::name, NameStr, NIL, NOTICE, object_aclcheck(), OBJECT_INDEX, OBJECT_MATVIEW, object_ownercheck(), OBJECT_TABLE, OBJECT_TABLESPACE, ObjectIdGetDatum(), OidIsValid, roleSpecsToIds(), ScanKeyInit(), stmt, AlterTableCmd::subtype, table_beginscan_catalog(), table_close(), table_endscan(), and table_open().

Referenced by ProcessUtilitySlow().

AlterTableNamespace()

ObjectAddress AlterTableNamespace	(	AlterObjectSchemaStmt *	stmt,
		Oid *	oldschema
	)

Definition at line 17016 of file tablecmds.c.

{
    Relation    rel;
    Oid         relid;
    Oid         oldNspOid;
    Oid         nspOid;
    RangeVar   *newrv;
    ObjectAddresses *objsMoved;
    ObjectAddress myself;
 
    relid = RangeVarGetRelidExtended(stmt->relation, AccessExclusiveLock,
                                     stmt->missing_ok ? RVR_MISSING_OK : 0,
                                     RangeVarCallbackForAlterRelation,
                                     (void *) stmt);
 
    if (!OidIsValid(relid))
    {
        ereport(NOTICE,
                (errmsg("relation \"%s\" does not exist, skipping",
                        stmt->relation->relname)));
        return InvalidObjectAddress;
    }
 
    rel = relation_open(relid, NoLock);
 
    oldNspOid = RelationGetNamespace(rel);
 
    /* If it's an owned sequence, disallow moving it by itself. */
    if (rel->rd_rel->relkind == RELKIND_SEQUENCE)
    {
        Oid         tableId;
        int32       colId;
 
        if (sequenceIsOwned(relid, DEPENDENCY_AUTO, &tableId, &colId) ||
            sequenceIsOwned(relid, DEPENDENCY_INTERNAL, &tableId, &colId))
            ereport(ERROR,
                    (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                     errmsg("cannot move an owned sequence into another schema"),
                     errdetail("Sequence \"%s\" is linked to table \"%s\".",
                               RelationGetRelationName(rel),
                               get_rel_name(tableId))));
    }
 
    /* Get and lock schema OID and check its permissions. */
    newrv = makeRangeVar(stmt->newschema, RelationGetRelationName(rel), -1);
    nspOid = RangeVarGetAndCheckCreationNamespace(newrv, NoLock, NULL);
 
    /* common checks on switching namespaces */
    CheckSetNamespace(oldNspOid, nspOid);
 
    objsMoved = new_object_addresses();
    AlterTableNamespaceInternal(rel, oldNspOid, nspOid, objsMoved);
    free_object_addresses(objsMoved);
 
    ObjectAddressSet(myself, RelationRelationId, relid);
 
    if (oldschema)
        *oldschema = oldNspOid;
 
    /* close rel, but keep lock until commit */
    relation_close(rel, NoLock);
 
    return myself;
}

References AccessExclusiveLock, AlterTableNamespaceInternal(), CheckSetNamespace(), DEPENDENCY_AUTO, DEPENDENCY_INTERNAL, ereport, errcode(), errdetail(), errmsg(), ERROR, free_object_addresses(), get_rel_name(), InvalidObjectAddress, makeRangeVar(), new_object_addresses(), NoLock, NOTICE, ObjectAddressSet, OidIsValid, RangeVarCallbackForAlterRelation(), RangeVarGetAndCheckCreationNamespace(), RangeVarGetRelidExtended(), RelationData::rd_rel, relation_close(), relation_open(), RelationGetNamespace, RelationGetRelationName, RVR_MISSING_OK, sequenceIsOwned(), and stmt.

Referenced by ExecAlterObjectSchemaStmt().

AlterTableNamespaceInternal()

void AlterTableNamespaceInternal	(	Relation	rel,
		Oid	oldNspOid,
		Oid	nspOid,
		ObjectAddresses *	objsMoved
	)

Definition at line 17087 of file tablecmds.c.

{
    Relation    classRel;
 
    Assert(objsMoved != NULL);
 
    /* OK, modify the pg_class row and pg_depend entry */
    classRel = table_open(RelationRelationId, RowExclusiveLock);
 
    AlterRelationNamespaceInternal(classRel, RelationGetRelid(rel), oldNspOid,
                                   nspOid, true, objsMoved);
 
    /* Fix the table's row type too, if it has one */
    if (OidIsValid(rel->rd_rel->reltype))
        AlterTypeNamespaceInternal(rel->rd_rel->reltype, nspOid,
                                   false,   /* isImplicitArray */
                                   false,   /* ignoreDependent */
                                   false,   /* errorOnTableType */
                                   objsMoved);
 
    /* Fix other dependent stuff */
    AlterIndexNamespaces(classRel, rel, oldNspOid, nspOid, objsMoved);
    AlterSeqNamespaces(classRel, rel, oldNspOid, nspOid,
                       objsMoved, AccessExclusiveLock);
    AlterConstraintNamespaces(RelationGetRelid(rel), oldNspOid, nspOid,
                              false, objsMoved);
 
    table_close(classRel, RowExclusiveLock);
}

References AccessExclusiveLock, AlterConstraintNamespaces(), AlterIndexNamespaces(), AlterRelationNamespaceInternal(), AlterSeqNamespaces(), AlterTypeNamespaceInternal(), Assert, OidIsValid, RelationData::rd_rel, RelationGetRelid, RowExclusiveLock, table_close(), and table_open().

Referenced by AlterObjectNamespace_oid(), and AlterTableNamespace().

ATAddCheckConstraint()

static ObjectAddress ATAddCheckConstraint ( List **  wqueue, AlteredTableInfo *  tab, Relation  rel, Constraint *  constr, bool  recurse, bool  recursing, bool  is_readd, LOCKMODE  lockmode  )

static

Definition at line 9386 of file tablecmds.c.

{
    List       *newcons;
    ListCell   *lcon;
    List       *children;
    ListCell   *child;
    ObjectAddress address = InvalidObjectAddress;
 
    /* At top level, permission check was done in ATPrepCmd, else do it */
    if (recursing)
        ATSimplePermissions(AT_AddConstraint, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
    /*
     * Call AddRelationNewConstraints to do the work, making sure it works on
     * a copy of the Constraint so transformExpr can't modify the original. It
     * returns a list of cooked constraints.
     *
     * If the constraint ends up getting merged with a pre-existing one, it's
     * omitted from the returned list, which is what we want: we do not need
     * to do any validation work.  That can only happen at child tables,
     * though, since we disallow merging at the top level.
     */
    newcons = AddRelationNewConstraints(rel, NIL,
                                        list_make1(copyObject(constr)),
                                        recursing || is_readd,  /* allow_merge */
                                        !recursing, /* is_local */
                                        is_readd,   /* is_internal */
                                        NULL);  /* queryString not available
                                                 * here */
 
    /* we don't expect more than one constraint here */
    Assert(list_length(newcons) <= 1);
 
    /* Add each to-be-validated constraint to Phase 3's queue */
    foreach(lcon, newcons)
    {
        CookedConstraint *ccon = (CookedConstraint *) lfirst(lcon);
 
        if (!ccon->skip_validation)
        {
            NewConstraint *newcon;
 
            newcon = (NewConstraint *) palloc0(sizeof(NewConstraint));
            newcon->name = ccon->name;
            newcon->contype = ccon->contype;
            newcon->qual = ccon->expr;
 
            tab->constraints = lappend(tab->constraints, newcon);
        }
 
        /* Save the actually assigned name if it was defaulted */
        if (constr->conname == NULL)
            constr->conname = ccon->name;
 
        ObjectAddressSet(address, ConstraintRelationId, ccon->conoid);
    }
 
    /* At this point we must have a locked-down name to use */
    Assert(constr->conname != NULL);
 
    /* Advance command counter in case same table is visited multiple times */
    CommandCounterIncrement();
 
    /*
     * If the constraint got merged with an existing constraint, we're done.
     * We mustn't recurse to child tables in this case, because they've
     * already got the constraint, and visiting them again would lead to an
     * incorrect value for coninhcount.
     */
    if (newcons == NIL)
        return address;
 
    /*
     * If adding a NO INHERIT constraint, no need to find our children.
     */
    if (constr->is_no_inherit)
        return address;
 
    /*
     * Propagate to children as appropriate.  Unlike most other ALTER
     * routines, we have to do this one level of recursion at a time; we can't
     * use find_all_inheritors to do it in one pass.
     */
    children =
        find_inheritance_children(RelationGetRelid(rel), lockmode);
 
    /*
     * Check if ONLY was specified with ALTER TABLE.  If so, allow the
     * constraint creation only if there are no children currently.  Error out
     * otherwise.
     */
    if (!recurse && children != NIL)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                 errmsg("constraint must be added to child tables too")));
 
    foreach(child, children)
    {
        Oid         childrelid = lfirst_oid(child);
        Relation    childrel;
        AlteredTableInfo *childtab;
 
        /* find_inheritance_children already got lock */
        childrel = table_open(childrelid, NoLock);
        CheckAlterTableIsSafe(childrel);
 
        /* Find or create work queue entry for this table */
        childtab = ATGetQueueEntry(wqueue, childrel);
 
        /* Recurse to child */
        ATAddCheckConstraint(wqueue, childtab, childrel,
                             constr, recurse, true, is_readd, lockmode);
 
        table_close(childrel, NoLock);
    }
 
    return address;
}

References AddRelationNewConstraints(), Assert, AT_AddConstraint, ATGetQueueEntry(), ATSimplePermissions(), ATT_FOREIGN_TABLE, ATT_TABLE, CheckAlterTableIsSafe(), CommandCounterIncrement(), Constraint::conname, CookedConstraint::conoid, AlteredTableInfo::constraints, NewConstraint::contype, CookedConstraint::contype, copyObject, ereport, errcode(), errmsg(), ERROR, CookedConstraint::expr, find_inheritance_children(), InvalidObjectAddress, Constraint::is_no_inherit, lappend(), lfirst, lfirst_oid, list_length(), list_make1, NewConstraint::name, CookedConstraint::name, NIL, NoLock, ObjectAddressSet, palloc0(), NewConstraint::qual, RelationGetRelid, CookedConstraint::skip_validation, table_close(), and table_open().

Referenced by ATExecAddConstraint(), and DetachAddConstraintIfNeeded().

ATAddForeignKeyConstraint()

static ObjectAddress ATAddForeignKeyConstraint ( List **  wqueue, AlteredTableInfo *  tab, Relation  rel, Constraint *  fkconstraint, bool  recurse, bool  recursing, LOCKMODE  lockmode  )

static

Definition at line 9523 of file tablecmds.c.

{
    Relation    pkrel;
    int16       pkattnum[INDEX_MAX_KEYS] = {0};
    int16       fkattnum[INDEX_MAX_KEYS] = {0};
    Oid         pktypoid[INDEX_MAX_KEYS] = {0};
    Oid         fktypoid[INDEX_MAX_KEYS] = {0};
    Oid         opclasses[INDEX_MAX_KEYS] = {0};
    Oid         pfeqoperators[INDEX_MAX_KEYS] = {0};
    Oid         ppeqoperators[INDEX_MAX_KEYS] = {0};
    Oid         ffeqoperators[INDEX_MAX_KEYS] = {0};
    int16       fkdelsetcols[INDEX_MAX_KEYS] = {0};
    int         i;
    int         numfks,
                numpks,
                numfkdelsetcols;
    Oid         indexOid;
    bool        old_check_ok;
    ObjectAddress address;
    ListCell   *old_pfeqop_item = list_head(fkconstraint->old_conpfeqop);
 
    /*
     * Grab ShareRowExclusiveLock on the pk table, so that someone doesn't
     * delete rows out from under us.
     */
    if (OidIsValid(fkconstraint->old_pktable_oid))
        pkrel = table_open(fkconstraint->old_pktable_oid, ShareRowExclusiveLock);
    else
        pkrel = table_openrv(fkconstraint->pktable, ShareRowExclusiveLock);
 
    /*
     * Validity checks (permission checks wait till we have the column
     * numbers)
     */
    if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    {
        if (!recurse)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("cannot use ONLY for foreign key on partitioned table \"%s\" referencing relation \"%s\"",
                            RelationGetRelationName(rel),
                            RelationGetRelationName(pkrel))));
        if (fkconstraint->skip_validation && !fkconstraint->initially_valid)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("cannot add NOT VALID foreign key on partitioned table \"%s\" referencing relation \"%s\"",
                            RelationGetRelationName(rel),
                            RelationGetRelationName(pkrel)),
                     errdetail("This feature is not yet supported on partitioned tables.")));
    }
 
    if (pkrel->rd_rel->relkind != RELKIND_RELATION &&
        pkrel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("referenced relation \"%s\" is not a table",
                        RelationGetRelationName(pkrel))));
 
    if (!allowSystemTableMods && IsSystemRelation(pkrel))
        ereport(ERROR,
                (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
                 errmsg("permission denied: \"%s\" is a system catalog",
                        RelationGetRelationName(pkrel))));
 
    /*
     * References from permanent or unlogged tables to temp tables, and from
     * permanent tables to unlogged tables, are disallowed because the
     * referenced data can vanish out from under us.  References from temp
     * tables to any other table type are also disallowed, because other
     * backends might need to run the RI triggers on the perm table, but they
     * can't reliably see tuples in the local buffers of other backends.
     */
    switch (rel->rd_rel->relpersistence)
    {
        case RELPERSISTENCE_PERMANENT:
            if (!RelationIsPermanent(pkrel))
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                         errmsg("constraints on permanent tables may reference only permanent tables")));
            break;
        case RELPERSISTENCE_UNLOGGED:
            if (!RelationIsPermanent(pkrel)
                && pkrel->rd_rel->relpersistence != RELPERSISTENCE_UNLOGGED)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                         errmsg("constraints on unlogged tables may reference only permanent or unlogged tables")));
            break;
        case RELPERSISTENCE_TEMP:
            if (pkrel->rd_rel->relpersistence != RELPERSISTENCE_TEMP)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                         errmsg("constraints on temporary tables may reference only temporary tables")));
            if (!pkrel->rd_islocaltemp || !rel->rd_islocaltemp)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                         errmsg("constraints on temporary tables must involve temporary tables of this session")));
            break;
    }
 
    /*
     * Look up the referencing attributes to make sure they exist, and record
     * their attnums and type OIDs.
     */
    numfks = transformColumnNameList(RelationGetRelid(rel),
                                     fkconstraint->fk_attrs,
                                     fkattnum, fktypoid);
 
    numfkdelsetcols = transformColumnNameList(RelationGetRelid(rel),
                                              fkconstraint->fk_del_set_cols,
                                              fkdelsetcols, NULL);
    validateFkOnDeleteSetColumns(numfks, fkattnum,
                                 numfkdelsetcols, fkdelsetcols,
                                 fkconstraint->fk_del_set_cols);
 
    /*
     * If the attribute list for the referenced table was omitted, lookup the
     * definition of the primary key and use it.  Otherwise, validate the
     * supplied attribute list.  In either case, discover the index OID and
     * index opclasses, and the attnums and type OIDs of the attributes.
     */
    if (fkconstraint->pk_attrs == NIL)
    {
        numpks = transformFkeyGetPrimaryKey(pkrel, &indexOid,
                                            &fkconstraint->pk_attrs,
                                            pkattnum, pktypoid,
                                            opclasses);
    }
    else
    {
        numpks = transformColumnNameList(RelationGetRelid(pkrel),
                                         fkconstraint->pk_attrs,
                                         pkattnum, pktypoid);
        /* Look for an index matching the column list */
        indexOid = transformFkeyCheckAttrs(pkrel, numpks, pkattnum,
                                           opclasses);
    }
 
    /*
     * Now we can check permissions.
     */
    checkFkeyPermissions(pkrel, pkattnum, numpks);
 
    /*
     * Check some things for generated columns.
     */
    for (i = 0; i < numfks; i++)
    {
        char        attgenerated = TupleDescAttr(RelationGetDescr(rel), fkattnum[i] - 1)->attgenerated;
 
        if (attgenerated)
        {
            /*
             * Check restrictions on UPDATE/DELETE actions, per SQL standard
             */
            if (fkconstraint->fk_upd_action == FKCONSTR_ACTION_SETNULL ||
                fkconstraint->fk_upd_action == FKCONSTR_ACTION_SETDEFAULT ||
                fkconstraint->fk_upd_action == FKCONSTR_ACTION_CASCADE)
                ereport(ERROR,
                        (errcode(ERRCODE_SYNTAX_ERROR),
                         errmsg("invalid %s action for foreign key constraint containing generated column",
                                "ON UPDATE")));
            if (fkconstraint->fk_del_action == FKCONSTR_ACTION_SETNULL ||
                fkconstraint->fk_del_action == FKCONSTR_ACTION_SETDEFAULT)
                ereport(ERROR,
                        (errcode(ERRCODE_SYNTAX_ERROR),
                         errmsg("invalid %s action for foreign key constraint containing generated column",
                                "ON DELETE")));
        }
    }
 
    /*
     * Look up the equality operators to use in the constraint.
     *
     * Note that we have to be careful about the difference between the actual
     * PK column type and the opclass' declared input type, which might be
     * only binary-compatible with it.  The declared opcintype is the right
     * thing to probe pg_amop with.
     */
    if (numfks != numpks)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_FOREIGN_KEY),
                 errmsg("number of referencing and referenced columns for foreign key disagree")));
 
    /*
     * On the strength of a previous constraint, we might avoid scanning
     * tables to validate this one.  See below.
     */
    old_check_ok = (fkconstraint->old_conpfeqop != NIL);
    Assert(!old_check_ok || numfks == list_length(fkconstraint->old_conpfeqop));
 
    for (i = 0; i < numpks; i++)
    {
        Oid         pktype = pktypoid[i];
        Oid         fktype = fktypoid[i];
        Oid         fktyped;
        HeapTuple   cla_ht;
        Form_pg_opclass cla_tup;
        Oid         amid;
        Oid         opfamily;
        Oid         opcintype;
        Oid         pfeqop;
        Oid         ppeqop;
        Oid         ffeqop;
        int16       eqstrategy;
        Oid         pfeqop_right;
 
        /* We need several fields out of the pg_opclass entry */
        cla_ht = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclasses[i]));
        if (!HeapTupleIsValid(cla_ht))
            elog(ERROR, "cache lookup failed for opclass %u", opclasses[i]);
        cla_tup = (Form_pg_opclass) GETSTRUCT(cla_ht);
        amid = cla_tup->opcmethod;
        opfamily = cla_tup->opcfamily;
        opcintype = cla_tup->opcintype;
        ReleaseSysCache(cla_ht);
 
        /*
         * Check it's a btree; currently this can never fail since no other
         * index AMs support unique indexes.  If we ever did have other types
         * of unique indexes, we'd need a way to determine which operator
         * strategy number is equality.  (Is it reasonable to insist that
         * every such index AM use btree's number for equality?)
         */
        if (amid != BTREE_AM_OID)
            elog(ERROR, "only b-tree indexes are supported for foreign keys");
        eqstrategy = BTEqualStrategyNumber;
 
        /*
         * There had better be a primary equality operator for the index.
         * We'll use it for PK = PK comparisons.
         */
        ppeqop = get_opfamily_member(opfamily, opcintype, opcintype,
                                     eqstrategy);
 
        if (!OidIsValid(ppeqop))
            elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
                 eqstrategy, opcintype, opcintype, opfamily);
 
        /*
         * Are there equality operators that take exactly the FK type? Assume
         * we should look through any domain here.
         */
        fktyped = getBaseType(fktype);
 
        pfeqop = get_opfamily_member(opfamily, opcintype, fktyped,
                                     eqstrategy);
        if (OidIsValid(pfeqop))
        {
            pfeqop_right = fktyped;
            ffeqop = get_opfamily_member(opfamily, fktyped, fktyped,
                                         eqstrategy);
        }
        else
        {
            /* keep compiler quiet */
            pfeqop_right = InvalidOid;
            ffeqop = InvalidOid;
        }
 
        if (!(OidIsValid(pfeqop) && OidIsValid(ffeqop)))
        {
            /*
             * Otherwise, look for an implicit cast from the FK type to the
             * opcintype, and if found, use the primary equality operator.
             * This is a bit tricky because opcintype might be a polymorphic
             * type such as ANYARRAY or ANYENUM; so what we have to test is
             * whether the two actual column types can be concurrently cast to
             * that type.  (Otherwise, we'd fail to reject combinations such
             * as int[] and point[].)
             */
            Oid         input_typeids[2];
            Oid         target_typeids[2];
 
            input_typeids[0] = pktype;
            input_typeids[1] = fktype;
            target_typeids[0] = opcintype;
            target_typeids[1] = opcintype;
            if (can_coerce_type(2, input_typeids, target_typeids,
                                COERCION_IMPLICIT))
            {
                pfeqop = ffeqop = ppeqop;
                pfeqop_right = opcintype;
            }
        }
 
        if (!(OidIsValid(pfeqop) && OidIsValid(ffeqop)))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("foreign key constraint \"%s\" cannot be implemented",
                            fkconstraint->conname),
                     errdetail("Key columns \"%s\" and \"%s\" "
                               "are of incompatible types: %s and %s.",
                               strVal(list_nth(fkconstraint->fk_attrs, i)),
                               strVal(list_nth(fkconstraint->pk_attrs, i)),
                               format_type_be(fktype),
                               format_type_be(pktype))));
 
        if (old_check_ok)
        {
            /*
             * When a pfeqop changes, revalidate the constraint.  We could
             * permit intra-opfamily changes, but that adds subtle complexity
             * without any concrete benefit for core types.  We need not
             * assess ppeqop or ffeqop, which RI_Initial_Check() does not use.
             */
            old_check_ok = (pfeqop == lfirst_oid(old_pfeqop_item));
            old_pfeqop_item = lnext(fkconstraint->old_conpfeqop,
                                    old_pfeqop_item);
        }
        if (old_check_ok)
        {
            Oid         old_fktype;
            Oid         new_fktype;
            CoercionPathType old_pathtype;
            CoercionPathType new_pathtype;
            Oid         old_castfunc;
            Oid         new_castfunc;
            Form_pg_attribute attr = TupleDescAttr(tab->oldDesc,
                                                   fkattnum[i] - 1);
 
            /*
             * Identify coercion pathways from each of the old and new FK-side
             * column types to the right (foreign) operand type of the pfeqop.
             * We may assume that pg_constraint.conkey is not changing.
             */
            old_fktype = attr->atttypid;
            new_fktype = fktype;
            old_pathtype = findFkeyCast(pfeqop_right, old_fktype,
                                        &old_castfunc);
            new_pathtype = findFkeyCast(pfeqop_right, new_fktype,
                                        &new_castfunc);
 
            /*
             * Upon a change to the cast from the FK column to its pfeqop
             * operand, revalidate the constraint.  For this evaluation, a
             * binary coercion cast is equivalent to no cast at all.  While
             * type implementors should design implicit casts with an eye
             * toward consistency of operations like equality, we cannot
             * assume here that they have done so.
             *
             * A function with a polymorphic argument could change behavior
             * arbitrarily in response to get_fn_expr_argtype().  Therefore,
             * when the cast destination is polymorphic, we only avoid
             * revalidation if the input type has not changed at all.  Given
             * just the core data types and operator classes, this requirement
             * prevents no would-be optimizations.
             *
             * If the cast converts from a base type to a domain thereon, then
             * that domain type must be the opcintype of the unique index.
             * Necessarily, the primary key column must then be of the domain
             * type.  Since the constraint was previously valid, all values on
             * the foreign side necessarily exist on the primary side and in
             * turn conform to the domain.  Consequently, we need not treat
             * domains specially here.
             *
             * Since we require that all collations share the same notion of
             * equality (which they do, because texteq reduces to bitwise
             * equality), we don't compare collation here.
             *
             * We need not directly consider the PK type.  It's necessarily
             * binary coercible to the opcintype of the unique index column,
             * and ri_triggers.c will only deal with PK datums in terms of
             * that opcintype.  Changing the opcintype also changes pfeqop.
             */
            old_check_ok = (new_pathtype == old_pathtype &&
                            new_castfunc == old_castfunc &&
                            (!IsPolymorphicType(pfeqop_right) ||
                             new_fktype == old_fktype));
        }
 
        pfeqoperators[i] = pfeqop;
        ppeqoperators[i] = ppeqop;
        ffeqoperators[i] = ffeqop;
    }
 
    /*
     * Create all the constraint and trigger objects, recursing to partitions
     * as necessary.  First handle the referenced side.
     */
    address = addFkRecurseReferenced(wqueue, fkconstraint, rel, pkrel,
                                     indexOid,
                                     InvalidOid,    /* no parent constraint */
                                     numfks,
                                     pkattnum,
                                     fkattnum,
                                     pfeqoperators,
                                     ppeqoperators,
                                     ffeqoperators,
                                     numfkdelsetcols,
                                     fkdelsetcols,
                                     old_check_ok,
                                     InvalidOid, InvalidOid);
 
    /* Now handle the referencing side. */
    addFkRecurseReferencing(wqueue, fkconstraint, rel, pkrel,
                            indexOid,
                            address.objectId,
                            numfks,
                            pkattnum,
                            fkattnum,
                            pfeqoperators,
                            ppeqoperators,
                            ffeqoperators,
                            numfkdelsetcols,
                            fkdelsetcols,
                            old_check_ok,
                            lockmode,
                            InvalidOid, InvalidOid);
 
    /*
     * Done.  Close pk table, but keep lock until we've committed.
     */
    table_close(pkrel, NoLock);
 
    return address;
}

References addFkRecurseReferenced(), addFkRecurseReferencing(), allowSystemTableMods, Assert, BTEqualStrategyNumber, can_coerce_type(), checkFkeyPermissions(), COERCION_IMPLICIT, Constraint::conname, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, findFkeyCast(), Constraint::fk_attrs, Constraint::fk_del_action, Constraint::fk_del_set_cols, Constraint::fk_upd_action, FKCONSTR_ACTION_CASCADE, FKCONSTR_ACTION_SETDEFAULT, FKCONSTR_ACTION_SETNULL, format_type_be(), get_opfamily_member(), getBaseType(), GETSTRUCT, HeapTupleIsValid, i, INDEX_MAX_KEYS, Constraint::initially_valid, InvalidOid, IsSystemRelation(), lfirst_oid, list_head(), list_length(), list_nth(), lnext(), NIL, NoLock, ObjectAddress::objectId, ObjectIdGetDatum(), OidIsValid, Constraint::old_conpfeqop, Constraint::old_pktable_oid, AlteredTableInfo::oldDesc, Constraint::pk_attrs, Constraint::pktable, RelationData::rd_islocaltemp, RelationData::rd_rel, RelationGetDescr, RelationGetRelationName, RelationGetRelid, RelationIsPermanent, ReleaseSysCache(), SearchSysCache1(), ShareRowExclusiveLock, Constraint::skip_validation, strVal, table_close(), table_open(), table_openrv(), transformColumnNameList(), transformFkeyCheckAttrs(), transformFkeyGetPrimaryKey(), TupleDescAttr, and validateFkOnDeleteSetColumns().

Referenced by ATExecAddConstraint().

ATCheckPartitionsNotInUse()

static void ATCheckPartitionsNotInUse ( Relation  rel, LOCKMODE  lockmode  )

static

Definition at line 6602 of file tablecmds.c.

{
    if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
    {
        List       *inh;
        ListCell   *cell;
 
        inh = find_all_inheritors(RelationGetRelid(rel), lockmode, NULL);
        /* first element is the parent rel; must ignore it */
        for_each_from(cell, inh, 1)
        {
            Relation    childrel;
 
            /* find_all_inheritors already got lock */
            childrel = table_open(lfirst_oid(cell), NoLock);
            CheckAlterTableIsSafe(childrel);
            table_close(childrel, NoLock);
        }
        list_free(inh);
    }
}

References CheckAlterTableIsSafe(), find_all_inheritors(), for_each_from, lfirst_oid, list_free(), NoLock, RelationData::rd_rel, RelationGetRelid, table_close(), and table_open().

Referenced by ATPrepCmd().

ATColumnChangeRequiresRewrite()

static bool ATColumnChangeRequiresRewrite ( Node *  expr, AttrNumber  varattno  )

static

Definition at line 12929 of file tablecmds.c.

{
    Assert(expr != NULL);
 
    for (;;)
    {
        /* only one varno, so no need to check that */
        if (IsA(expr, Var) && ((Var *) expr)->varattno == varattno)
            return false;
        else if (IsA(expr, RelabelType))
            expr = (Node *) ((RelabelType *) expr)->arg;
        else if (IsA(expr, CoerceToDomain))
        {
            CoerceToDomain *d = (CoerceToDomain *) expr;
 
            if (DomainHasConstraints(d->resulttype))
                return true;
            expr = (Node *) d->arg;
        }
        else if (IsA(expr, FuncExpr))
        {
            FuncExpr   *f = (FuncExpr *) expr;
 
            switch (f->funcid)
            {
                case F_TIMESTAMPTZ_TIMESTAMP:
                case F_TIMESTAMP_TIMESTAMPTZ:
                    if (TimestampTimestampTzRequiresRewrite())
                        return true;
                    else
                        expr = linitial(f->args);
                    break;
                default:
                    return true;
            }
        }
        else
            return true;
    }
}

References arg, CoerceToDomain::arg, FuncExpr::args, Assert, DomainHasConstraints(), FuncExpr::funcid, IsA, linitial, CoerceToDomain::resulttype, and TimestampTimestampTzRequiresRewrite().

Referenced by ATPrepAlterColumnType().

ATController()

static void ATController ( AlterTableStmt *  parsetree, Relation  rel, List *  cmds, bool  recurse, LOCKMODE  lockmode, AlterTableUtilityContext *  context  )

static

Definition at line 4703 of file tablecmds.c.

{
    List       *wqueue = NIL;
    ListCell   *lcmd;
 
    /* Phase 1: preliminary examination of commands, create work queue */
    foreach(lcmd, cmds)
    {
        AlterTableCmd *cmd = (AlterTableCmd *) lfirst(lcmd);
 
        ATPrepCmd(&wqueue, rel, cmd, recurse, false, lockmode, context);
    }
 
    /* Close the relation, but keep lock until commit */
    relation_close(rel, NoLock);
 
    /* Phase 2: update system catalogs */
    ATRewriteCatalogs(&wqueue, lockmode, context);
 
    /* Phase 3: scan/rewrite tables as needed, and run afterStmts */
    ATRewriteTables(parsetree, &wqueue, lockmode, context);
}

References ATPrepCmd(), ATRewriteCatalogs(), ATRewriteTables(), context, lfirst, NIL, NoLock, and relation_close().

Referenced by AlterTable(), and AlterTableInternal().

ATDetachCheckNoForeignKeyRefs()

static void ATDetachCheckNoForeignKeyRefs ( Relation  partition )

static

Definition at line 19897 of file tablecmds.c.

{
    List       *constraints;
    ListCell   *cell;
 
    constraints = GetParentedForeignKeyRefs(partition);
 
    foreach(cell, constraints)
    {
        Oid         constrOid = lfirst_oid(cell);
        HeapTuple   tuple;
        Form_pg_constraint constrForm;
        Relation    rel;
        Trigger     trig = {0};
 
        tuple = SearchSysCache1(CONSTROID, ObjectIdGetDatum(constrOid));
        if (!HeapTupleIsValid(tuple))
            elog(ERROR, "cache lookup failed for constraint %u", constrOid);
        constrForm = (Form_pg_constraint) GETSTRUCT(tuple);
 
        Assert(OidIsValid(constrForm->conparentid));
        Assert(constrForm->confrelid == RelationGetRelid(partition));
 
        /* prevent data changes into the referencing table until commit */
        rel = table_open(constrForm->conrelid, ShareLock);
 
        trig.tgoid = InvalidOid;
        trig.tgname = NameStr(constrForm->conname);
        trig.tgenabled = TRIGGER_FIRES_ON_ORIGIN;
        trig.tgisinternal = true;
        trig.tgconstrrelid = RelationGetRelid(partition);
        trig.tgconstrindid = constrForm->conindid;
        trig.tgconstraint = constrForm->oid;
        trig.tgdeferrable = false;
        trig.tginitdeferred = false;
        /* we needn't fill in remaining fields */
 
        RI_PartitionRemove_Check(&trig, rel, partition);
 
        ReleaseSysCache(tuple);
 
        table_close(rel, NoLock);
    }
}

References Assert, elog, ERROR, GetParentedForeignKeyRefs(), GETSTRUCT, HeapTupleIsValid, InvalidOid, lfirst_oid, NameStr, NoLock, ObjectIdGetDatum(), OidIsValid, RelationGetRelid, ReleaseSysCache(), RI_PartitionRemove_Check(), SearchSysCache1(), ShareLock, table_close(), table_open(), Trigger::tgconstraint, Trigger::tgconstrindid, Trigger::tgconstrrelid, Trigger::tgdeferrable, Trigger::tgenabled, Trigger::tginitdeferred, Trigger::tgisinternal, Trigger::tgname, Trigger::tgoid, and TRIGGER_FIRES_ON_ORIGIN.

Referenced by ATExecDetachPartition().

AtEOSubXact_on_commit_actions()

void AtEOSubXact_on_commit_actions	(	bool	isCommit,
		SubTransactionId	mySubid,
		SubTransactionId	parentSubid
	)

Definition at line 17522 of file tablecmds.c.

{
    ListCell   *cur_item;
 
    foreach(cur_item, on_commits)
    {
        OnCommitItem *oc = (OnCommitItem *) lfirst(cur_item);
 
        if (!isCommit && oc->creating_subid == mySubid)
        {
            /* cur_item must be removed */
            on_commits = foreach_delete_current(on_commits, cur_item);
            pfree(oc);
        }
        else
        {
            /* cur_item must be preserved */
            if (oc->creating_subid == mySubid)
                oc->creating_subid = parentSubid;
            if (oc->deleting_subid == mySubid)
                oc->deleting_subid = isCommit ? parentSubid : InvalidSubTransactionId;
        }
    }
}

References OnCommitItem::creating_subid, OnCommitItem::deleting_subid, foreach_delete_current, InvalidSubTransactionId, lfirst, on_commits, and pfree().

Referenced by AbortSubTransaction(), and CommitSubTransaction().

AtEOXact_on_commit_actions()

void AtEOXact_on_commit_actions

(

bool

isCommit

)

Definition at line 17490 of file tablecmds.c.

{
    ListCell   *cur_item;
 
    foreach(cur_item, on_commits)
    {
        OnCommitItem *oc = (OnCommitItem *) lfirst(cur_item);
 
        if (isCommit ? oc->deleting_subid != InvalidSubTransactionId :
            oc->creating_subid != InvalidSubTransactionId)
        {
            /* cur_item must be removed */
            on_commits = foreach_delete_current(on_commits, cur_item);
            pfree(oc);
        }
        else
        {
            /* cur_item must be preserved */
            oc->creating_subid = InvalidSubTransactionId;
            oc->deleting_subid = InvalidSubTransactionId;
        }
    }
}

References OnCommitItem::creating_subid, OnCommitItem::deleting_subid, foreach_delete_current, InvalidSubTransactionId, lfirst, on_commits, and pfree().

Referenced by AbortTransaction(), CommitTransaction(), and PrepareTransaction().

ATExecAddColumn()

static ObjectAddress ATExecAddColumn ( List **  wqueue, AlteredTableInfo *  tab, Relation  rel, AlterTableCmd **  cmd, bool  recurse, bool  recursing, LOCKMODE  lockmode, AlterTablePass  cur_pass, AlterTableUtilityContext *  context  )

static

Definition at line 6958 of file tablecmds.c.

{
    Oid         myrelid = RelationGetRelid(rel);
    ColumnDef  *colDef = castNode(ColumnDef, (*cmd)->def);
    bool        if_not_exists = (*cmd)->missing_ok;
    Relation    pgclass,
                attrdesc;
    HeapTuple   reltup;
    Form_pg_class relform;
    Form_pg_attribute attribute;
    int         newattnum;
    char        relkind;
    Expr       *defval;
    List       *children;
    ListCell   *child;
    AlterTableCmd *childcmd;
    ObjectAddress address;
    TupleDesc   tupdesc;
 
    /* since this function recurses, it could be driven to stack overflow */
    check_stack_depth();
 
    /* At top level, permission check was done in ATPrepCmd, else do it */
    if (recursing)
        ATSimplePermissions((*cmd)->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
    if (rel->rd_rel->relispartition && !recursing)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot add column to a partition")));
 
    attrdesc = table_open(AttributeRelationId, RowExclusiveLock);
 
    /*
     * Are we adding the column to a recursion child?  If so, check whether to
     * merge with an existing definition for the column.  If we do merge, we
     * must not recurse.  Children will already have the column, and recursing
     * into them would mess up attinhcount.
     */
    if (colDef->inhcount > 0)
    {
        HeapTuple   tuple;
 
        /* Does child already have a column by this name? */
        tuple = SearchSysCacheCopyAttName(myrelid, colDef->colname);
        if (HeapTupleIsValid(tuple))
        {
            Form_pg_attribute childatt = (Form_pg_attribute) GETSTRUCT(tuple);
            Oid         ctypeId;
            int32       ctypmod;
            Oid         ccollid;
 
            /* Child column must match on type, typmod, and collation */
            typenameTypeIdAndMod(NULL, colDef->typeName, &ctypeId, &ctypmod);
            if (ctypeId != childatt->atttypid ||
                ctypmod != childatt->atttypmod)
                ereport(ERROR,
                        (errcode(ERRCODE_DATATYPE_MISMATCH),
                         errmsg("child table \"%s\" has different type for column \"%s\"",
                                RelationGetRelationName(rel), colDef->colname)));
            ccollid = GetColumnDefCollation(NULL, colDef, ctypeId);
            if (ccollid != childatt->attcollation)
                ereport(ERROR,
                        (errcode(ERRCODE_COLLATION_MISMATCH),
                         errmsg("child table \"%s\" has different collation for column \"%s\"",
                                RelationGetRelationName(rel), colDef->colname),
                         errdetail("\"%s\" versus \"%s\"",
                                   get_collation_name(ccollid),
                                   get_collation_name(childatt->attcollation))));
 
            /* Bump the existing child att's inhcount */
            childatt->attinhcount++;
            if (childatt->attinhcount < 0)
                ereport(ERROR,
                        errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                        errmsg("too many inheritance parents"));
            CatalogTupleUpdate(attrdesc, &tuple->t_self, tuple);
 
            heap_freetuple(tuple);
 
            /* Inform the user about the merge */
            ereport(NOTICE,
                    (errmsg("merging definition of column \"%s\" for child \"%s\"",
                            colDef->colname, RelationGetRelationName(rel))));
 
            table_close(attrdesc, RowExclusiveLock);
 
            /* Make the child column change visible */
            CommandCounterIncrement();
 
            return InvalidObjectAddress;
        }
    }
 
    /* skip if the name already exists and if_not_exists is true */
    if (!check_for_column_name_collision(rel, colDef->colname, if_not_exists))
    {
        table_close(attrdesc, RowExclusiveLock);
        return InvalidObjectAddress;
    }
 
    /*
     * Okay, we need to add the column, so go ahead and do parse
     * transformation.  This can result in queueing up, or even immediately
     * executing, subsidiary operations (such as creation of unique indexes);
     * so we mustn't do it until we have made the if_not_exists check.
     *
     * When recursing, the command was already transformed and we needn't do
     * so again.  Also, if context isn't given we can't transform.  (That
     * currently happens only for AT_AddColumnToView; we expect that view.c
     * passed us a ColumnDef that doesn't need work.)
     */
    if (context != NULL && !recursing)
    {
        *cmd = ATParseTransformCmd(wqueue, tab, rel, *cmd, recurse, lockmode,
                                   cur_pass, context);
        Assert(*cmd != NULL);
        colDef = castNode(ColumnDef, (*cmd)->def);
    }
 
    /*
     * Regular inheritance children are independent enough not to inherit the
     * identity column from parent hence cannot recursively add identity
     * column if the table has inheritance children.
     *
     * Partitions, on the other hand, are integral part of a partitioned table
     * and inherit identity column.  Hence propagate identity column down the
     * partition hierarchy.
     */
    if (colDef->identity &&
        recurse &&
        rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE &&
        find_inheritance_children(myrelid, NoLock) != NIL)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                 errmsg("cannot recursively add identity column to table that has child tables")));
 
    pgclass = table_open(RelationRelationId, RowExclusiveLock);
 
    reltup = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(myrelid));
    if (!HeapTupleIsValid(reltup))
        elog(ERROR, "cache lookup failed for relation %u", myrelid);
    relform = (Form_pg_class) GETSTRUCT(reltup);
    relkind = relform->relkind;
 
    /* Determine the new attribute's number */
    newattnum = relform->relnatts + 1;
    if (newattnum > MaxHeapAttributeNumber)
        ereport(ERROR,
                (errcode(ERRCODE_TOO_MANY_COLUMNS),
                 errmsg("tables can have at most %d columns",
                        MaxHeapAttributeNumber)));
 
    /*
     * Construct new attribute's pg_attribute entry.
     */
    tupdesc = BuildDescForRelation(list_make1(colDef));
 
    attribute = TupleDescAttr(tupdesc, 0);
 
    /* Fix up attribute number */
    attribute->attnum = newattnum;
 
    /* make sure datatype is legal for a column */
    CheckAttributeType(NameStr(attribute->attname), attribute->atttypid, attribute->attcollation,
                       list_make1_oid(rel->rd_rel->reltype),
                       0);
 
    InsertPgAttributeTuples(attrdesc, tupdesc, myrelid, NULL, NULL);
 
    table_close(attrdesc, RowExclusiveLock);
 
    /*
     * Update pg_class tuple as appropriate
     */
    relform->relnatts = newattnum;
 
    CatalogTupleUpdate(pgclass, &reltup->t_self, reltup);
 
    heap_freetuple(reltup);
 
    /* Post creation hook for new attribute */
    InvokeObjectPostCreateHook(RelationRelationId, myrelid, newattnum);
 
    table_close(pgclass, RowExclusiveLock);
 
    /* Make the attribute's catalog entry visible */
    CommandCounterIncrement();
 
    /*
     * Store the DEFAULT, if any, in the catalogs
     */
    if (colDef->raw_default)
    {
        RawColumnDefault *rawEnt;
 
        rawEnt = (RawColumnDefault *) palloc(sizeof(RawColumnDefault));
        rawEnt->attnum = attribute->attnum;
        rawEnt->raw_default = copyObject(colDef->raw_default);
 
        /*
         * Attempt to skip a complete table rewrite by storing the specified
         * DEFAULT value outside of the heap.  This may be disabled inside
         * AddRelationNewConstraints if the optimization cannot be applied.
         */
        rawEnt->missingMode = (!colDef->generated);
 
        rawEnt->generated = colDef->generated;
 
        /*
         * This function is intended for CREATE TABLE, so it processes a
         * _list_ of defaults, but we just do one.
         */
        AddRelationNewConstraints(rel, list_make1(rawEnt), NIL,
                                  false, true, false, NULL);
 
        /* Make the additional catalog changes visible */
        CommandCounterIncrement();
 
        /*
         * Did the request for a missing value work? If not we'll have to do a
         * rewrite
         */
        if (!rawEnt->missingMode)
            tab->rewrite |= AT_REWRITE_DEFAULT_VAL;
    }
 
    /*
     * Tell Phase 3 to fill in the default expression, if there is one.
     *
     * If there is no default, Phase 3 doesn't have to do anything, because
     * that effectively means that the default is NULL.  The heap tuple access
     * routines always check for attnum > # of attributes in tuple, and return
     * NULL if so, so without any modification of the tuple data we will get
     * the effect of NULL values in the new column.
     *
     * An exception occurs when the new column is of a domain type: the domain
     * might have a not-null constraint, or a check constraint that indirectly
     * rejects nulls.  If there are any domain constraints then we construct
     * an explicit NULL default value that will be passed through
     * CoerceToDomain processing.  (This is a tad inefficient, since it causes
     * rewriting the table which we really don't have to do, but the present
     * design of domain processing doesn't offer any simple way of checking
     * the constraints more directly.)
     *
     * Note: we use build_column_default, and not just the cooked default
     * returned by AddRelationNewConstraints, so that the right thing happens
     * when a datatype's default applies.
     *
     * Note: it might seem that this should happen at the end of Phase 2, so
     * that the effects of subsequent subcommands can be taken into account.
     * It's intentional that we do it now, though.  The new column should be
     * filled according to what is said in the ADD COLUMN subcommand, so that
     * the effects are the same as if this subcommand had been run by itself
     * and the later subcommands had been issued in new ALTER TABLE commands.
     *
     * We can skip this entirely for relations without storage, since Phase 3
     * is certainly not going to touch them.  System attributes don't have
     * interesting defaults, either.
     */
    if (RELKIND_HAS_STORAGE(relkind))
    {
        /*
         * For an identity column, we can't use build_column_default(),
         * because the sequence ownership isn't set yet.  So do it manually.
         */
        if (colDef->identity)
        {
            NextValueExpr *nve = makeNode(NextValueExpr);
 
            nve->seqid = RangeVarGetRelid(colDef->identitySequence, NoLock, false);
            nve->typeId = attribute->atttypid;
 
            defval = (Expr *) nve;
 
            /* must do a rewrite for identity columns */
            tab->rewrite |= AT_REWRITE_DEFAULT_VAL;
        }
        else
            defval = (Expr *) build_column_default(rel, attribute->attnum);
 
        if (!defval && DomainHasConstraints(attribute->atttypid))
        {
            Oid         baseTypeId;
            int32       baseTypeMod;
            Oid         baseTypeColl;
 
            baseTypeMod = attribute->atttypmod;
            baseTypeId = getBaseTypeAndTypmod(attribute->atttypid, &baseTypeMod);
            baseTypeColl = get_typcollation(baseTypeId);
            defval = (Expr *) makeNullConst(baseTypeId, baseTypeMod, baseTypeColl);
            defval = (Expr *) coerce_to_target_type(NULL,
                                                    (Node *) defval,
                                                    baseTypeId,
                                                    attribute->atttypid,
                                                    attribute->atttypmod,
                                                    COERCION_ASSIGNMENT,
                                                    COERCE_IMPLICIT_CAST,
                                                    -1);
            if (defval == NULL) /* should not happen */
                elog(ERROR, "failed to coerce base type to domain");
        }
 
        if (defval)
        {
            NewColumnValue *newval;
 
            newval = (NewColumnValue *) palloc0(sizeof(NewColumnValue));
            newval->attnum = attribute->attnum;
            newval->expr = expression_planner(defval);
            newval->is_generated = (colDef->generated != '\0');
 
            tab->newvals = lappend(tab->newvals, newval);
        }
 
        if (DomainHasConstraints(attribute->atttypid))
            tab->rewrite |= AT_REWRITE_DEFAULT_VAL;
 
        if (!TupleDescAttr(rel->rd_att, attribute->attnum - 1)->atthasmissing)
        {
            /*
             * If the new column is NOT NULL, and there is no missing value,
             * tell Phase 3 it needs to check for NULLs.
             */
            tab->verify_new_notnull |= colDef->is_not_null;
        }
    }
 
    /*
     * Add needed dependency entries for the new column.
     */
    add_column_datatype_dependency(myrelid, newattnum, attribute->atttypid);
    add_column_collation_dependency(myrelid, newattnum, attribute->attcollation);
 
    /*
     * Propagate to children as appropriate.  Unlike most other ALTER
     * routines, we have to do this one level of recursion at a time; we can't
     * use find_all_inheritors to do it in one pass.
     */
    children =
        find_inheritance_children(RelationGetRelid(rel), lockmode);
 
    /*
     * If we are told not to recurse, there had better not be any child
     * tables; else the addition would put them out of step.
     */
    if (children && !recurse)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                 errmsg("column must be added to child tables too")));
 
    /* Children should see column as singly inherited */
    if (!recursing)
    {
        childcmd = copyObject(*cmd);
        colDef = castNode(ColumnDef, childcmd->def);
        colDef->inhcount = 1;
        colDef->is_local = false;
    }
    else
        childcmd = *cmd;        /* no need to copy again */
 
    foreach(child, children)
    {
        Oid         childrelid = lfirst_oid(child);
        Relation    childrel;
        AlteredTableInfo *childtab;
 
        /* find_inheritance_children already got lock */
        childrel = table_open(childrelid, NoLock);
        CheckAlterTableIsSafe(childrel);
 
        /* Find or create work queue entry for this table */
        childtab = ATGetQueueEntry(wqueue, childrel);
 
        /* Recurse to child; return value is ignored */
        ATExecAddColumn(wqueue, childtab, childrel,
                        &childcmd, recurse, true,
                        lockmode, cur_pass, context);
 
        table_close(childrel, NoLock);
    }
 
    ObjectAddressSubSet(address, RelationRelationId, myrelid, newattnum);
    return address;
}

References add_column_collation_dependency(), add_column_datatype_dependency(), AddRelationNewConstraints(), Assert, AT_REWRITE_DEFAULT_VAL, ATGetQueueEntry(), ATParseTransformCmd(), ATSimplePermissions(), ATT_FOREIGN_TABLE, ATT_TABLE, RawColumnDefault::attnum, build_column_default(), BuildDescForRelation(), castNode, CatalogTupleUpdate(), check_for_column_name_collision(), check_stack_depth(), CheckAlterTableIsSafe(), CheckAttributeType(), COERCE_IMPLICIT_CAST, coerce_to_target_type(), COERCION_ASSIGNMENT, ColumnDef::colname, CommandCounterIncrement(), context, copyObject, AlterTableCmd::def, DomainHasConstraints(), elog, ereport, errcode(), errdetail(), errmsg(), ERROR, expression_planner(), find_inheritance_children(), RawColumnDefault::generated, ColumnDef::generated, get_collation_name(), get_typcollation(), getBaseTypeAndTypmod(), GetColumnDefCollation(), GETSTRUCT, heap_freetuple(), HeapTupleIsValid, ColumnDef::identity, ColumnDef::identitySequence, ColumnDef::inhcount, InsertPgAttributeTuples(), InvalidObjectAddress, InvokeObjectPostCreateHook, ColumnDef::is_local, ColumnDef::is_not_null, lappend(), lfirst_oid, list_make1, list_make1_oid, makeNode, makeNullConst(), MaxHeapAttributeNumber, RawColumnDefault::missingMode, NameStr, newval, AlteredTableInfo::newvals, NIL, NoLock, NOTICE, ObjectAddressSubSet, ObjectIdGetDatum(), palloc(), palloc0(), RangeVarGetRelid, RawColumnDefault::raw_default, ColumnDef::raw_default, RelationData::rd_att, RelationData::rd_rel, RelationGetRelationName, RelationGetRelid, AlteredTableInfo::rewrite, RowExclusiveLock, SearchSysCacheCopy1, SearchSysCacheCopyAttName(), NextValueExpr::seqid, HeapTupleData::t_self, table_close(), table_open(), TupleDescAttr, NextValueExpr::typeId, ColumnDef::typeName, typenameTypeIdAndMod(), and AlteredTableInfo::verify_new_notnull.

Referenced by ATExecCmd().

ATExecAddConstraint()

static ObjectAddress ATExecAddConstraint ( List **  wqueue, AlteredTableInfo *  tab, Relation  rel, Constraint *  newConstraint, bool  recurse, bool  is_readd, LOCKMODE  lockmode  )

static

Definition at line 9271 of file tablecmds.c.

{
    ObjectAddress address = InvalidObjectAddress;
 
    Assert(IsA(newConstraint, Constraint));
 
    /*
     * Currently, we only expect to see CONSTR_CHECK and CONSTR_FOREIGN nodes
     * arriving here (see the preprocessing done in parse_utilcmd.c).  Use a
     * switch anyway to make it easier to add more code later.
     */
    switch (newConstraint->contype)
    {
        case CONSTR_CHECK:
            address =
                ATAddCheckConstraint(wqueue, tab, rel,
                                     newConstraint, recurse, false, is_readd,
                                     lockmode);
            break;
 
        case CONSTR_FOREIGN:
 
            /*
             * Assign or validate constraint name
             */
            if (newConstraint->conname)
            {
                if (ConstraintNameIsUsed(CONSTRAINT_RELATION,
                                         RelationGetRelid(rel),
                                         newConstraint->conname))
                    ereport(ERROR,
                            (errcode(ERRCODE_DUPLICATE_OBJECT),
                             errmsg("constraint \"%s\" for relation \"%s\" already exists",
                                    newConstraint->conname,
                                    RelationGetRelationName(rel))));
            }
            else
                newConstraint->conname =
                    ChooseConstraintName(RelationGetRelationName(rel),
                                         ChooseForeignKeyConstraintNameAddition(newConstraint->fk_attrs),
                                         "fkey",
                                         RelationGetNamespace(rel),
                                         NIL);
 
            address = ATAddForeignKeyConstraint(wqueue, tab, rel,
                                                newConstraint,
                                                recurse, false,
                                                lockmode);
            break;
 
        default:
            elog(ERROR, "unrecognized constraint type: %d",
                 (int) newConstraint->contype);
    }
 
    return address;
}

References Assert, ATAddCheckConstraint(), ATAddForeignKeyConstraint(), ChooseConstraintName(), ChooseForeignKeyConstraintNameAddition(), Constraint::conname, CONSTR_CHECK, CONSTR_FOREIGN, CONSTRAINT_RELATION, ConstraintNameIsUsed(), Constraint::contype, elog, ereport, errcode(), ERRCODE_DUPLICATE_OBJECT, errmsg(), ERROR, Constraint::fk_attrs, InvalidObjectAddress, IsA, NIL, RelationGetNamespace, RelationGetRelationName, and RelationGetRelid.

Referenced by ATExecCmd().

ATExecAddIdentity()

static ObjectAddress ATExecAddIdentity ( Relation  rel, const char *  colName, Node *  def, LOCKMODE  lockmode, bool  recurse, bool  recursing  )

static

Definition at line 7939 of file tablecmds.c.

{
    Relation    attrelation;
    HeapTuple   tuple;
    Form_pg_attribute attTup;
    AttrNumber  attnum;
    ObjectAddress address;
    ColumnDef  *cdef = castNode(ColumnDef, def);
    bool        ispartitioned;
 
    ispartitioned = (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
    if (ispartitioned && !recurse)
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                 errmsg("cannot add identity to a column of only the partitioned table"),
                 errhint("Do not specify the ONLY keyword.")));
 
    if (rel->rd_rel->relispartition && !recursing)
        ereport(ERROR,
                errcode(ERRCODE_INVALID_TABLE_DEFINITION),
                errmsg("cannot add identity to a column of a partition"));
 
    attrelation = table_open(AttributeRelationId, RowExclusiveLock);
 
    tuple = SearchSysCacheCopyAttName(RelationGetRelid(rel), colName);
    if (!HeapTupleIsValid(tuple))
        ereport(ERROR,
                (errcode(ERRCODE_UNDEFINED_COLUMN),
                 errmsg("column \"%s\" of relation \"%s\" does not exist",
                        colName, RelationGetRelationName(rel))));
    attTup = (Form_pg_attribute) GETSTRUCT(tuple);
    attnum = attTup->attnum;
 
    /* Can't alter a system attribute */
    if (attnum <= 0)
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("cannot alter system column \"%s\"",
                        colName)));
 
    /*
     * Creating a column as identity implies NOT NULL, so adding the identity
     * to an existing column that is not NOT NULL would create a state that
     * cannot be reproduced without contortions.
     */
    if (!attTup->attnotnull)
        ereport(ERROR,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("column \"%s\" of relation \"%s\" must be declared NOT NULL before identity can be added",
                        colName, RelationGetRelationName(rel))));
 
    if (attTup->attidentity)
        ereport(ERROR,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("column \"%s\" of relation \"%s\" is already an identity column",
                        colName, RelationGetRelationName(rel))));
 
    if (attTup->atthasdef)
        ereport(ERROR,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("column \"%s\" of relation \"%s\" already has a default value",
                        colName, RelationGetRelationName(rel))));
 
    attTup->attidentity = cdef->identity;
    CatalogTupleUpdate(attrelation, &tuple->t_self, tuple);
 
    InvokeObjectPostAlterHook(RelationRelationId,
                              RelationGetRelid(rel),
                              attTup->attnum);
    ObjectAddressSubSet(address, RelationRelationId,
                        RelationGetRelid(rel), attnum);
    heap_freetuple(tuple);
 
    table_close(attrelation, RowExclusiveLock);
 
    /*
     * Recurse to propagate the identity column to partitions.  Identity is
     * not inherited in regular inheritance children.
     */
    if (recurse && ispartitioned)
    {
        List       *children;
        ListCell   *lc;
 
        children = find_inheritance_children(RelationGetRelid(rel), lockmode);
 
        foreach(lc, children)
        {
            Relation    childrel;
 
            childrel = table_open(lfirst_oid(lc), NoLock);
            ATExecAddIdentity(childrel, colName, def, lockmode, recurse, true);
            table_close(childrel, NoLock);
        }
    }
 
    return address;
}

References attnum, castNode, CatalogTupleUpdate(), ereport, errcode(), errhint(), errmsg(), ERROR, find_inheritance_children(), GETSTRUCT, heap_freetuple(), HeapTupleIsValid, ColumnDef::identity, InvokeObjectPostAlterHook, lfirst_oid, NoLock, ObjectAddressSubSet, RelationData::rd_rel, RelationGetRelationName, RelationGetRelid, RowExclusiveLock, SearchSysCacheCopyAttName(), HeapTupleData::t_self, table_close(), and table_open().

Referenced by ATExecCmd().

ATExecAddIndex()

static ObjectAddress ATExecAddIndex ( AlteredTableInfo *  tab, Relation  rel, IndexStmt *  stmt, bool  is_rebuild, LOCKMODE  lockmode  )

static

Definition at line 9095 of file tablecmds.c.

{
    bool        check_rights;
    bool        skip_build;
    bool        quiet;
    ObjectAddress address;
 
    Assert(IsA(stmt, IndexStmt));
    Assert(!stmt->concurrent);
 
    /* The IndexStmt has already been through transformIndexStmt */
    Assert(stmt->transformed);
 
    /* suppress schema rights check when rebuilding existing index */
    check_rights = !is_rebuild;
    /* skip index build if phase 3 will do it or we're reusing an old one */
    skip_build = tab->rewrite > 0 || RelFileNumberIsValid(stmt->oldNumber);
    /* suppress notices when rebuilding existing index */
    quiet = is_rebuild;
 
    address = DefineIndex(RelationGetRelid(rel),
                          stmt,
                          InvalidOid,   /* no predefined OID */
                          InvalidOid,   /* no parent index */
                          InvalidOid,   /* no parent constraint */
                          -1,   /* total_parts unknown */
                          true, /* is_alter_table */
                          check_rights,
                          false,    /* check_not_in_use - we did it already */
                          skip_build,
                          quiet);
 
    /*
     * If TryReuseIndex() stashed a relfilenumber for us, we used it for the
     * new index instead of building from scratch.  Restore associated fields.
     * This may store InvalidSubTransactionId in both fields, in which case
     * relcache.c will assume it can rebuild the relcache entry.  Hence, do
     * this after the CCI that made catalog rows visible to any rebuild.  The
     * DROP of the old edition of this index will have scheduled the storage
     * for deletion at commit, so cancel that pending deletion.
     */
    if (RelFileNumberIsValid(stmt->oldNumber))
    {
        Relation    irel = index_open(address.objectId, NoLock);
 
        irel->rd_createSubid = stmt->oldCreateSubid;
        irel->rd_firstRelfilelocatorSubid = stmt->oldFirstRelfilelocatorSubid;
        RelationPreserveStorage(irel->rd_locator, true);
        index_close(irel, NoLock);
    }
 
    return address;
}

References Assert, DefineIndex(), index_close(), index_open(), InvalidOid, IsA, NoLock, ObjectAddress::objectId, RelationData::rd_createSubid, RelationData::rd_firstRelfilelocatorSubid, RelationData::rd_locator, RelationGetRelid, RelationPreserveStorage(), RelFileNumberIsValid, AlteredTableInfo::rewrite, and stmt.

Referenced by ATExecCmd().

ATExecAddIndexConstraint()

static ObjectAddress ATExecAddIndexConstraint ( AlteredTableInfo *  tab, Relation  rel, IndexStmt *  stmt, LOCKMODE  lockmode  )

static

Definition at line 9179 of file tablecmds.c.

{
    Oid         index_oid = stmt->indexOid;
    Relation    indexRel;
    char       *indexName;
    IndexInfo  *indexInfo;
    char       *constraintName;
    char        constraintType;
    ObjectAddress address;
    bits16      flags;
 
    Assert(IsA(stmt, IndexStmt));
    Assert(OidIsValid(index_oid));
    Assert(stmt->isconstraint);
 
    /*
     * Doing this on partitioned tables is not a simple feature to implement,
     * so let's punt for now.
     */
    if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("ALTER TABLE / ADD CONSTRAINT USING INDEX is not supported on partitioned tables")));
 
    indexRel = index_open(index_oid, AccessShareLock);
 
    indexName = pstrdup(RelationGetRelationName(indexRel));
 
    indexInfo = BuildIndexInfo(indexRel);
 
    /* this should have been checked at parse time */
    if (!indexInfo->ii_Unique)
        elog(ERROR, "index \"%s\" is not unique", indexName);
 
    /*
     * Determine name to assign to constraint.  We require a constraint to
     * have the same name as the underlying index; therefore, use the index's
     * existing name as the default constraint name, and if the user
     * explicitly gives some other name for the constraint, rename the index
     * to match.
     */
    constraintName = stmt->idxname;
    if (constraintName == NULL)
        constraintName = indexName;
    else if (strcmp(constraintName, indexName) != 0)
    {
        ereport(NOTICE,
                (errmsg("ALTER TABLE / ADD CONSTRAINT USING INDEX will rename index \"%s\" to \"%s\"",
                        indexName, constraintName)));
        RenameRelationInternal(index_oid, constraintName, false, true);
    }
 
    /* Extra checks needed if making primary key */
    if (stmt->primary)
        index_check_primary_key(rel, indexInfo, true, stmt);
 
    /* Note we currently don't support EXCLUSION constraints here */
    if (stmt->primary)
        constraintType = CONSTRAINT_PRIMARY;
    else
        constraintType = CONSTRAINT_UNIQUE;
 
    /* Create the catalog entries for the constraint */
    flags = INDEX_CONSTR_CREATE_UPDATE_INDEX |
        INDEX_CONSTR_CREATE_REMOVE_OLD_DEPS |
        (stmt->initdeferred ? INDEX_CONSTR_CREATE_INIT_DEFERRED : 0) |
        (stmt->deferrable ? INDEX_CONSTR_CREATE_DEFERRABLE : 0) |
        (stmt->primary ? INDEX_CONSTR_CREATE_MARK_AS_PRIMARY : 0);
 
    address = index_constraint_create(rel,
                                      index_oid,
                                      InvalidOid,
                                      indexInfo,
                                      constraintName,
                                      constraintType,
                                      flags,
                                      allowSystemTableMods,
                                      false);   /* is_internal */
 
    index_close(indexRel, NoLock);
 
    return address;
}

References AccessShareLock, allowSystemTableMods, Assert, BuildIndexInfo(), elog, ereport, errcode(), errmsg(), ERROR, IndexInfo::ii_Unique, index_check_primary_key(), index_close(), INDEX_CONSTR_CREATE_DEFERRABLE, INDEX_CONSTR_CREATE_INIT_DEFERRED, INDEX_CONSTR_CREATE_MARK_AS_PRIMARY, INDEX_CONSTR_CREATE_REMOVE_OLD_DEPS, INDEX_CONSTR_CREATE_UPDATE_INDEX, index_constraint_create(), index_open(), InvalidOid, IsA, NoLock, NOTICE, OidIsValid, pstrdup(), RelationData::rd_rel, RelationGetRelationName, RenameRelationInternal(), and stmt.

Referenced by ATExecCmd().

ATExecAddInherit()

static ObjectAddress ATExecAddInherit ( Relation  child_rel, RangeVar *  parent, LOCKMODE  lockmode  )

static

Definition at line 15467 of file tablecmds.c.

{
    Relation    parent_rel;
    List       *children;
    ObjectAddress address;
    const char *trigger_name;
 
    /*
     * A self-exclusive lock is needed here.  See the similar case in
     * MergeAttributes() for a full explanation.
     */
    parent_rel = table_openrv(parent, ShareUpdateExclusiveLock);
 
    /*
     * Must be owner of both parent and child -- child was checked by
     * ATSimplePermissions call in ATPrepCmd
     */
    ATSimplePermissions(AT_AddInherit, parent_rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
    /* Permanent rels cannot inherit from temporary ones */
    if (parent_rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP &&
        child_rel->rd_rel->relpersistence != RELPERSISTENCE_TEMP)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot inherit from temporary relation \"%s\"",
                        RelationGetRelationName(parent_rel))));
 
    /* If parent rel is temp, it must belong to this session */
    if (parent_rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP &&
        !parent_rel->rd_islocaltemp)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot inherit from temporary relation of another session")));
 
    /* Ditto for the child */
    if (child_rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP &&
        !child_rel->rd_islocaltemp)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot inherit to temporary relation of another session")));
 
    /* Prevent partitioned tables from becoming inheritance parents */
    if (parent_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot inherit from partitioned table \"%s\"",
                        parent->relname)));
 
    /* Likewise for partitions */
    if (parent_rel->rd_rel->relispartition)
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("cannot inherit from a partition")));
 
    /*
     * Prevent circularity by seeing if proposed parent inherits from child.
     * (In particular, this disallows making a rel inherit from itself.)
     *
     * This is not completely bulletproof because of race conditions: in
     * multi-level inheritance trees, someone else could concurrently be
     * making another inheritance link that closes the loop but does not join
     * either of the rels we have locked.  Preventing that seems to require
     * exclusive locks on the entire inheritance tree, which is a cure worse
     * than the disease.  find_all_inheritors() will cope with circularity
     * anyway, so don't sweat it too much.
     *
     * We use weakest lock we can on child's children, namely AccessShareLock.
     */
    children = find_all_inheritors(RelationGetRelid(child_rel),
                                   AccessShareLock, NULL);
 
    if (list_member_oid(children, RelationGetRelid(parent_rel)))
        ereport(ERROR,
                (errcode(ERRCODE_DUPLICATE_TABLE),
                 errmsg("circular inheritance not allowed"),
                 errdetail("\"%s\" is already a child of \"%s\".",
                           parent->relname,
                           RelationGetRelationName(child_rel))));
 
    /*
     * If child_rel has row-level triggers with transition tables, we
     * currently don't allow it to become an inheritance child.  See also
     * prohibitions in ATExecAttachPartition() and CreateTrigger().
     */
    trigger_name = FindTriggerIncompatibleWithInheritance(child_rel->trigdesc);
    if (trigger_name != NULL)
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("trigger \"%s\" prevents table \"%s\" from becoming an inheritance child",
                        trigger_name, RelationGetRelationName(child_rel)),
                 errdetail("ROW triggers with transition tables are not supported in inheritance hierarchies.")));
 
    /* OK to create inheritance */
    CreateInheritance(child_rel, parent_rel, false);
 
    ObjectAddressSet(address, RelationRelationId,
                     RelationGetRelid(parent_rel));
 
    /* keep our lock on the parent relation until commit */
    table_close(parent_rel, NoLock);
 
    return address;
}

References AccessShareLock, AT_AddInherit, ATSimplePermissions(), ATT_FOREIGN_TABLE, ATT_TABLE, CreateInheritance(), ereport, errcode(), errdetail(), errmsg(), ERROR, find_all_inheritors(), FindTriggerIncompatibleWithInheritance(), list_member_oid(), NoLock, ObjectAddressSet, RelationData::rd_islocaltemp, RelationData::rd_rel, RelationGetRelationName, RelationGetRelid, RangeVar::relname, ShareUpdateExclusiveLock, table_close(), table_openrv(), and RelationData::trigdesc.

Referenced by ATExecCmd().

ATExecAddOf()

static ObjectAddress ATExecAddOf ( Relation  rel, const TypeName *  ofTypename, LOCKMODE  lockmode  )

static

Definition at line 16292 of file tablecmds.c.

{
    Oid         relid = RelationGetRelid(rel);
    Type        typetuple;
    Form_pg_type typeform;
    Oid         typeid;
    Relation    inheritsRelation,
                relationRelation;
    SysScanDesc scan;
    ScanKeyData key;
    AttrNumber  table_attno,
                type_attno;
    TupleDesc   typeTupleDesc,
                tableTupleDesc;
    ObjectAddress tableobj,
                typeobj;
    HeapTuple   classtuple;
 
    /* Validate the type. */
    typetuple = typenameType(NULL, ofTypename, NULL);
    check_of_type(typetuple);
    typeform = (Form_pg_type) GETSTRUCT(typetuple);
    typeid = typeform->oid;
 
    /* Fail if the table has any inheritance parents. */
    inheritsRelation = table_open(InheritsRelationId, AccessShareLock);
    ScanKeyInit(&key,
                Anum_pg_inherits_inhrelid,
                BTEqualStrategyNumber, F_OIDEQ,
                ObjectIdGetDatum(relid));
    scan = systable_beginscan(inheritsRelation, InheritsRelidSeqnoIndexId,
                              true, NULL, 1, &key);
    if (HeapTupleIsValid(systable_getnext(scan)))
        ereport(ERROR,
                (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                 errmsg("typed tables cannot inherit")));
    systable_endscan(scan);
    table_close(inheritsRelation, AccessShareLock);
 
    /*
     * Check the tuple descriptors for compatibility.  Unlike inheritance, we
     * require that the order also match.  However, attnotnull need not match.
     */
    typeTupleDesc = lookup_rowtype_tupdesc(typeid, -1);
    tableTupleDesc = RelationGetDescr(rel);
    table_attno = 1;
    for (type_attno = 1; type_attno <= typeTupleDesc->natts; type_attno++)
    {
        Form_pg_attribute type_attr,
                    table_attr;
        const char *type_attname,
                   *table_attname;
 
        /* Get the next non-dropped type attribute. */
        type_attr = TupleDescAttr(typeTupleDesc, type_attno - 1);
        if (type_attr->attisdropped)
            continue;
        type_attname = NameStr(type_attr->attname);
 
        /* Get the next non-dropped table attribute. */
        do
        {
            if (table_attno > tableTupleDesc->natts)
                ereport(ERROR,
                        (errcode(ERRCODE_DATATYPE_MISMATCH),
                         errmsg("table is missing column \"%s\"",
                                type_attname)));
            table_attr = TupleDescAttr(tableTupleDesc, table_attno - 1);
            table_attno++;
        } while (table_attr->attisdropped);
        table_attname = NameStr(table_attr->attname);
 
        /* Compare name. */
        if (strncmp(table_attname, type_attname, NAMEDATALEN) != 0)
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("table has column \"%s\" where type requires \"%s\"",
                            table_attname, type_attname)));
 
        /* Compare type. */
        if (table_attr->atttypid != type_attr->atttypid ||
            table_attr->atttypmod != type_attr->atttypmod ||
            table_attr->attcollation != type_attr->attcollation)
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("table \"%s\" has different type for column \"%s\"",
                            RelationGetRelationName(rel), type_attname)));
    }
    ReleaseTupleDesc(typeTupleDesc);
 
    /* Any remaining columns at the end of the table had better be dropped. */
    for (; table_attno <= tableTupleDesc->natts; table_attno++)
    {
        Form_pg_attribute table_attr = TupleDescAttr(tableTupleDesc,
                                                     table_attno - 1);
 
        if (!table_attr->attisdropped)
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("table has extra column \"%s\"",
                            NameStr(table_attr->attname))));
    }
 
    /* If the table was already typed, drop the existing dependency. */
    if (rel->rd_rel->reloftype)
        drop_parent_dependency(relid, TypeRelationId, rel->rd_rel->reloftype,
                               DEPENDENCY_NORMAL);
 
    /* Record a dependency on the new type. */
    tableobj.classId = RelationRelationId;
    tableobj.objectId = relid;
    tableobj.objectSubId = 0;
    typeobj.classId = TypeRelationId;
    typeobj.objectId = typeid;
    typeobj.objectSubId = 0;
    recordDependencyOn(&tableobj, &typeobj, DEPENDENCY_NORMAL);
 
    /* Update pg_class.reloftype */
    relationRelation = table_open(RelationRelationId, RowExclusiveLock);
    classtuple = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relid));
    if (!HeapTupleIsValid(classtuple))
        elog(ERROR, "cache lookup failed for relation %u", relid);
    ((Form_pg_class) GETSTRUCT(classtuple))->reloftype = typeid;
    CatalogTupleUpdate(relationRelation, &classtuple->t_self, classtuple);
 
    InvokeObjectPostAlterHook(RelationRelationId, relid, 0);
 
    heap_freetuple(classtuple);
    table_close(relationRelation, RowExclusiveLock);
 
    ReleaseSysCache(typetuple);
 
    return typeobj;
}

References AccessShareLock, BTEqualStrategyNumber, CatalogTupleUpdate(), check_of_type(), ObjectAddress::classId, DEPENDENCY_NORMAL, drop_parent_dependency(), elog, ereport, errcode(), errmsg(), ERROR, GETSTRUCT, heap_freetuple(), HeapTupleIsValid, InvokeObjectPostAlterHook, sort-test::key, lookup_rowtype_tupdesc(), NAMEDATALEN, NameStr, TupleDescData::natts, ObjectAddress::objectId, ObjectIdGetDatum(), ObjectAddress::objectSubId, RelationData::rd_rel, recordDependencyOn(), RelationGetDescr, RelationGetRelationName, RelationGetRelid, ReleaseSysCache(), ReleaseTupleDesc, RowExclusiveLock, ScanKeyInit(), SearchSysCacheCopy1, systable_beginscan(), systable_endscan(), systable_getnext(), HeapTupleData::t_self, table_close(), table_open(), TupleDescAttr, and typenameType().

Referenced by ATExecCmd().

ATExecAddStatistics()

static ObjectAddress ATExecAddStatistics ( AlteredTableInfo *  tab, Relation  rel, CreateStatsStmt *  stmt, bool  is_rebuild, LOCKMODE  lockmode  )

static

Definition at line 9158 of file tablecmds.c.

{
    ObjectAddress address;
 
    Assert(IsA(stmt, CreateStatsStmt));
 
    /* The CreateStatsStmt has already been through transformStatsStmt */
    Assert(stmt->transformed);
 
    address = CreateStatistics(stmt);
 
    return address;
}

References Assert, CreateStatistics(), IsA, and stmt.

Referenced by ATExecCmd().

ATExecAlterColumnGenericOptions()

static ObjectAddress ATExecAlterColumnGenericOptions ( Relation  rel, const char *  colName, List *  options, LOCKMODE  lockmode  )

static

Definition at line 14166 of file tablecmds.c.

{
    Relation    ftrel;
    Relation    attrel;
    ForeignServer *server;
    ForeignDataWrapper *fdw;
    HeapTuple   tuple;
    HeapTuple   newtuple;
    bool        isnull;
    Datum       repl_val[Natts_pg_attribute];
    bool        repl_null[Natts_pg_attribute];
    bool        repl_repl[Natts_pg_attribute];
    Datum       datum;
    Form_pg_foreign_table fttableform;
    Form_pg_attribute atttableform;
    AttrNumber  attnum;
    ObjectAddress address;
 
    if (options == NIL)
        return InvalidObjectAddress;
 
    /* First, determine FDW validator associated to the foreign table. */
    ftrel =