dropcmds.c File Reference

#include "postgres.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "access/xact.h"
#include "catalog/dependency.h"
#include "catalog/namespace.h"
#include "catalog/objectaddress.h"
#include "catalog/pg_class.h"
#include "catalog/pg_proc.h"
#include "commands/defrem.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "parser/parse_type.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"

Include dependency graph for dropcmds.c:

Go to the source code of this file.

Functions
static void	does_not_exist_skipping (ObjectType objtype, Node *object)
static bool	owningrel_does_not_exist_skipping (List *object, const char **msg, char **name)
static bool	schema_does_not_exist_skipping (List *object, const char **msg, char **name)
static bool	type_in_list_does_not_exist_skipping (List *typenames, const char **msg, char **name)
void	RemoveObjects (DropStmt *stmt)

Function Documentation

does_not_exist_skipping()

static void does_not_exist_skipping ( ObjectType  objtype, Node *  object  )

static

Definition at line 248 of file dropcmds.c.

References generate_unaccent_rules::args, castNode, elog, ereport, errmsg(), ERROR, gettext_noop, linitial, linitial_node, list_copy(), list_copy_tail(), list_length(), list_make1, list_truncate(), llast, lsecond, lsecond_node, name, NameListToString(), TypeName::names, NOTICE, ObjectWithArgs::objargs, OBJECT_ACCESS_METHOD, OBJECT_AGGREGATE, OBJECT_CAST, OBJECT_COLLATION, OBJECT_CONVERSION, OBJECT_DOMAIN, OBJECT_EVENT_TRIGGER, OBJECT_EXTENSION, OBJECT_FDW, OBJECT_FOREIGN_SERVER, OBJECT_FUNCTION, OBJECT_LANGUAGE, OBJECT_OPCLASS, OBJECT_OPERATOR, OBJECT_OPFAMILY, OBJECT_POLICY, OBJECT_PROCEDURE, OBJECT_PUBLICATION, OBJECT_ROUTINE, OBJECT_RULE, OBJECT_SCHEMA, OBJECT_STATISTIC_EXT, OBJECT_TRANSFORM, OBJECT_TRIGGER, OBJECT_TSCONFIGURATION, OBJECT_TSDICTIONARY, OBJECT_TSPARSER, OBJECT_TSTEMPLATE, OBJECT_TYPE, ObjectWithArgs::objname, owningrel_does_not_exist_skipping(), schema_does_not_exist_skipping(), strVal, type_in_list_does_not_exist_skipping(), TypeNameListToString(), and TypeNameToString().

Referenced by RemoveObjects().

{
    const char *msg = NULL;
    char       *name = NULL;
    char       *args = NULL;

    switch (objtype)
    {
        case OBJECT_ACCESS_METHOD:
            msg = gettext_noop("access method \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_TYPE:
        case OBJECT_DOMAIN:
            {
                TypeName   *typ = castNode(TypeName, object);

                if (!schema_does_not_exist_skipping(typ->names, &msg, &name))
                {
                    msg = gettext_noop("type \"%s\" does not exist, skipping");
                    name = TypeNameToString(typ);
                }
            }
            break;
        case OBJECT_COLLATION:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("collation \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_CONVERSION:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("conversion \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_SCHEMA:
            msg = gettext_noop("schema \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_STATISTIC_EXT:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("statistics object \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_TSPARSER:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("text search parser \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_TSDICTIONARY:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("text search dictionary \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_TSTEMPLATE:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("text search template \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_TSCONFIGURATION:
            if (!schema_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("text search configuration \"%s\" does not exist, skipping");
                name = NameListToString(castNode(List, object));
            }
            break;
        case OBJECT_EXTENSION:
            msg = gettext_noop("extension \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_FUNCTION:
            {
                ObjectWithArgs *owa = castNode(ObjectWithArgs, object);

                if (!schema_does_not_exist_skipping(owa->objname, &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(owa->objargs, &msg, &name))
                {
                    msg = gettext_noop("function %s(%s) does not exist, skipping");
                    name = NameListToString(owa->objname);
                    args = TypeNameListToString(owa->objargs);
                }
                break;
            }
        case OBJECT_PROCEDURE:
            {
                ObjectWithArgs *owa = castNode(ObjectWithArgs, object);

                if (!schema_does_not_exist_skipping(owa->objname, &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(owa->objargs, &msg, &name))
                {
                    msg = gettext_noop("procedure %s(%s) does not exist, skipping");
                    name = NameListToString(owa->objname);
                    args = TypeNameListToString(owa->objargs);
                }
                break;
            }
        case OBJECT_ROUTINE:
            {
                ObjectWithArgs *owa = castNode(ObjectWithArgs, object);

                if (!schema_does_not_exist_skipping(owa->objname, &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(owa->objargs, &msg, &name))
                {
                    msg = gettext_noop("routine %s(%s) does not exist, skipping");
                    name = NameListToString(owa->objname);
                    args = TypeNameListToString(owa->objargs);
                }
                break;
            }
        case OBJECT_AGGREGATE:
            {
                ObjectWithArgs *owa = castNode(ObjectWithArgs, object);

                if (!schema_does_not_exist_skipping(owa->objname, &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(owa->objargs, &msg, &name))
                {
                    msg = gettext_noop("aggregate %s(%s) does not exist, skipping");
                    name = NameListToString(owa->objname);
                    args = TypeNameListToString(owa->objargs);
                }
                break;
            }
        case OBJECT_OPERATOR:
            {
                ObjectWithArgs *owa = castNode(ObjectWithArgs, object);

                if (!schema_does_not_exist_skipping(owa->objname, &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(owa->objargs, &msg, &name))
                {
                    msg = gettext_noop("operator %s does not exist, skipping");
                    name = NameListToString(owa->objname);
                }
                break;
            }
        case OBJECT_LANGUAGE:
            msg = gettext_noop("language \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_CAST:
            {
                if (!type_in_list_does_not_exist_skipping(list_make1(linitial(castNode(List, object))), &msg, &name) &&
                    !type_in_list_does_not_exist_skipping(list_make1(lsecond(castNode(List, object))), &msg, &name))
                {
                    /* XXX quote or no quote? */
                    msg = gettext_noop("cast from type %s to type %s does not exist, skipping");
                    name = TypeNameToString(linitial_node(TypeName, castNode(List, object)));
                    args = TypeNameToString(lsecond_node(TypeName, castNode(List, object)));
                }
            }
            break;
        case OBJECT_TRANSFORM:
            if (!type_in_list_does_not_exist_skipping(list_make1(linitial(castNode(List, object))), &msg, &name))
            {
                msg = gettext_noop("transform for type %s language \"%s\" does not exist, skipping");
                name = TypeNameToString(linitial_node(TypeName, castNode(List, object)));
                args = strVal(lsecond(castNode(List, object)));
            }
            break;
        case OBJECT_TRIGGER:
            if (!owningrel_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("trigger \"%s\" for relation \"%s\" does not exist, skipping");
                name = strVal(llast(castNode(List, object)));
                args = NameListToString(list_truncate(list_copy(castNode(List, object)),
                                                      list_length(castNode(List, object)) - 1));
            }
            break;
        case OBJECT_POLICY:
            if (!owningrel_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("policy \"%s\" for relation \"%s\" does not exist, skipping");
                name = strVal(llast(castNode(List, object)));
                args = NameListToString(list_truncate(list_copy(castNode(List, object)),
                                                      list_length(castNode(List, object)) - 1));
            }
            break;
        case OBJECT_EVENT_TRIGGER:
            msg = gettext_noop("event trigger \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_RULE:
            if (!owningrel_does_not_exist_skipping(castNode(List, object), &msg, &name))
            {
                msg = gettext_noop("rule \"%s\" for relation \"%s\" does not exist, skipping");
                name = strVal(llast(castNode(List, object)));
                args = NameListToString(list_truncate(list_copy(castNode(List, object)),
                                                      list_length(castNode(List, object)) - 1));
            }
            break;
        case OBJECT_FDW:
            msg = gettext_noop("foreign-data wrapper \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_FOREIGN_SERVER:
            msg = gettext_noop("server \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        case OBJECT_OPCLASS:
            {
                List       *opcname = list_copy_tail(castNode(List, object), 1);

                if (!schema_does_not_exist_skipping(opcname, &msg, &name))
                {
                    msg = gettext_noop("operator class \"%s\" does not exist for access method \"%s\", skipping");
                    name = NameListToString(opcname);
                    args = strVal(linitial(castNode(List, object)));
                }
            }
            break;
        case OBJECT_OPFAMILY:
            {
                List       *opfname = list_copy_tail(castNode(List, object), 1);

                if (!schema_does_not_exist_skipping(opfname, &msg, &name))
                {
                    msg = gettext_noop("operator family \"%s\" does not exist for access method \"%s\", skipping");
                    name = NameListToString(opfname);
                    args = strVal(linitial(castNode(List, object)));
                }
            }
            break;
        case OBJECT_PUBLICATION:
            msg = gettext_noop("publication \"%s\" does not exist, skipping");
            name = strVal(object);
            break;
        default:
            elog(ERROR, "unrecognized object type: %d", (int) objtype);
            break;
    }

    if (!args)
        ereport(NOTICE, (errmsg(msg, name)));
    else
        ereport(NOTICE, (errmsg(msg, name, args)));
}

owningrel_does_not_exist_skipping()

static bool owningrel_does_not_exist_skipping ( List *  object, const char **  msg, char **  name  )

static

Definition at line 143 of file dropcmds.c.

References gettext_noop, list_copy(), list_length(), list_truncate(), makeRangeVarFromNameList(), NameListToString(), NoLock, OidIsValid, RangeVarGetRelid, and schema_does_not_exist_skipping().

Referenced by does_not_exist_skipping().

{
    List       *parent_object;
    RangeVar   *parent_rel;

    parent_object = list_truncate(list_copy(object),
                                  list_length(object) - 1);

    if (schema_does_not_exist_skipping(parent_object, msg, name))
        return true;

    parent_rel = makeRangeVarFromNameList(parent_object);

    if (!OidIsValid(RangeVarGetRelid(parent_rel, NoLock, true)))
    {
        *msg = gettext_noop("relation \"%s\" does not exist, skipping");
        *name = NameListToString(parent_object);

        return true;
    }

    return false;
}

RemoveObjects()

void RemoveObjects

(

DropStmt *

stmt

)

Definition at line 57 of file dropcmds.c.

References AccessExclusiveLock, add_exact_object_address(), Assert, DropStmt::behavior, castNode, check_object_ownership(), does_not_exist_skipping(), ereport, errcode(), errhint(), errmsg(), ERROR, free_object_addresses(), get_func_prokind(), get_object_address(), get_object_namespace(), GetUserId(), isTempNamespace(), lfirst, DropStmt::missing_ok, MyXactFlags, NameListToString(), new_object_addresses(), NoLock, OBJECT_FUNCTION, ObjectAddress::objectId, DropStmt::objects, OidIsValid, performMultipleDeletions(), pg_namespace_ownercheck(), DropStmt::removeType, table_close(), and XACT_FLAGS_ACCESSEDTEMPNAMESPACE.

Referenced by ExecDropStmt().

{
    ObjectAddresses *objects;
    ListCell   *cell1;

    objects = new_object_addresses();

    foreach(cell1, stmt->objects)
    {
        ObjectAddress address;
        Node       *object = lfirst(cell1);
        Relation    relation = NULL;
        Oid         namespaceId;

        /* Get an ObjectAddress for the object. */
        address = get_object_address(stmt->removeType,
                                     object,
                                     &relation,
                                     AccessExclusiveLock,
                                     stmt->missing_ok);

        /*
         * Issue NOTICE if supplied object was not found.  Note this is only
         * relevant in the missing_ok case, because otherwise
         * get_object_address would have thrown an error.
         */
        if (!OidIsValid(address.objectId))
        {
            Assert(stmt->missing_ok);
            does_not_exist_skipping(stmt->removeType, object);
            continue;
        }

        /*
         * Although COMMENT ON FUNCTION, SECURITY LABEL ON FUNCTION, etc. are
         * happy to operate on an aggregate as on any other function, we have
         * historically not allowed this for DROP FUNCTION.
         */
        if (stmt->removeType == OBJECT_FUNCTION)
        {
            if (get_func_prokind(address.objectId) == PROKIND_AGGREGATE)
                ereport(ERROR,
                        (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                         errmsg("\"%s\" is an aggregate function",
                                NameListToString(castNode(ObjectWithArgs, object)->objname)),
                         errhint("Use DROP AGGREGATE to drop aggregate functions.")));
        }

        /* Check permissions. */
        namespaceId = get_object_namespace(&address);
        if (!OidIsValid(namespaceId) ||
            !pg_namespace_ownercheck(namespaceId, GetUserId()))
            check_object_ownership(GetUserId(), stmt->removeType, address,
                                   object, relation);

        /*
         * Make note if a temporary namespace has been accessed in this
         * transaction.
         */
        if (OidIsValid(namespaceId) && isTempNamespace(namespaceId))
            MyXactFlags |= XACT_FLAGS_ACCESSEDTEMPNAMESPACE;

        /* Release any relcache reference count, but keep lock until commit. */
        if (relation)
            table_close(relation, NoLock);

        add_exact_object_address(&address, objects);
    }

    /* Here we really delete them. */
    performMultipleDeletions(objects, stmt->behavior, 0);

    free_object_addresses(objects);
}

schema_does_not_exist_skipping()

static bool schema_does_not_exist_skipping ( List *  object, const char **  msg, char **  name  )

static

Definition at line 179 of file dropcmds.c.

References gettext_noop, LookupNamespaceNoError(), makeRangeVarFromNameList(), OidIsValid, and RangeVar::schemaname.

Referenced by does_not_exist_skipping(), owningrel_does_not_exist_skipping(), and type_in_list_does_not_exist_skipping().

{
    RangeVar   *rel;

    rel = makeRangeVarFromNameList(object);

    if (rel->schemaname != NULL &&
        !OidIsValid(LookupNamespaceNoError(rel->schemaname)))
    {
        *msg = gettext_noop("schema \"%s\" does not exist, skipping");
        *name = rel->schemaname;

        return true;
    }

    return false;
}

type_in_list_does_not_exist_skipping()

static bool type_in_list_does_not_exist_skipping ( List *  typenames, const char **  msg, char **  name  )

static

Definition at line 211 of file dropcmds.c.

References gettext_noop, lfirst_node, LookupTypeNameOid(), TypeName::names, OidIsValid, schema_does_not_exist_skipping(), and TypeNameToString().

Referenced by does_not_exist_skipping().

{
    ListCell   *l;

    foreach(l, typenames)
    {
        TypeName   *typeName = lfirst_node(TypeName, l);

        if (typeName != NULL)
        {
            if (!OidIsValid(LookupTypeNameOid(NULL, typeName, true)))
            {
                /* type doesn't exist, try to find why */
                if (schema_does_not_exist_skipping(typeName->names, msg, name))
                    return true;

                *msg = gettext_noop("type \"%s\" does not exist, skipping");
                *name = TypeNameToString(typeName);

                return true;
            }
        }
    }

    return false;
}