#include "catalog/objectaddress.h"
#include "nodes/parsenodes.h"

Include dependency graph for schemacmds.h:

This graph shows which files directly or indirectly include this file:

Functions
Oid	CreateSchemaCommand (CreateSchemaStmt parsetree, const char queryString, int stmt_location, int stmt_len)

void	RemoveSchemaById (Oid schemaOid)

ObjectAddress	RenameSchema (const char oldname, const char newname)

ObjectAddress	AlterSchemaOwner (const char *name, Oid newOwnerId)

void	AlterSchemaOwner_oid (Oid schemaOid, Oid newOwnerId)

Function Documentation

◆ AlterSchemaOwner()

ObjectAddress AlterSchemaOwner	(	const char *	name,
		Oid	newOwnerId
	)

Definition at line 321 of file schemacmds.c.

References AlterSchemaOwner_internal(), CStringGetDatum, ereport, errcode(), errmsg(), ERROR, heap_close, heap_open(), HeapTupleGetOid, HeapTupleIsValid, NAMESPACENAME, ObjectAddressSet, ReleaseSysCache(), RowExclusiveLock, and SearchSysCache1().

Referenced by ExecAlterOwnerStmt().

 {
     Oid         nspOid;
     HeapTuple   tup;
     Relation    rel;
     ObjectAddress address;
 
     rel = heap_open(NamespaceRelationId, RowExclusiveLock);
 
     tup = SearchSysCache1(NAMESPACENAME, CStringGetDatum(name));
     if (!HeapTupleIsValid(tup))
         ereport(ERROR,
                 (errcode(ERRCODE_UNDEFINED_SCHEMA),
                  errmsg("schema \"%s\" does not exist", name)));
 
     nspOid = HeapTupleGetOid(tup);
 
     AlterSchemaOwner_internal(tup, rel, newOwnerId);
 
     ObjectAddressSet(address, NamespaceRelationId, nspOid);
 
     ReleaseSysCache(tup);
 
     heap_close(rel, RowExclusiveLock);
 
     return address;
 }

◆ AlterSchemaOwner_oid()

void AlterSchemaOwner_oid	(	Oid	schemaOid,
		Oid	newOwnerId
	)

Definition at line 298 of file schemacmds.c.

References AlterSchemaOwner_internal(), elog, ERROR, heap_close, heap_open(), HeapTupleIsValid, NAMESPACEOID, ObjectIdGetDatum, ReleaseSysCache(), RowExclusiveLock, and SearchSysCache1().

Referenced by shdepReassignOwned().

 {
     HeapTuple   tup;
     Relation    rel;
 
     rel = heap_open(NamespaceRelationId, RowExclusiveLock);
 
     tup = SearchSysCache1(NAMESPACEOID, ObjectIdGetDatum(oid));
     if (!HeapTupleIsValid(tup))
         elog(ERROR, "cache lookup failed for schema %u", oid);
 
     AlterSchemaOwner_internal(tup, rel, newOwnerId);
 
     ReleaseSysCache(tup);
 
     heap_close(rel, RowExclusiveLock);
 }

◆ CreateSchemaCommand()

Oid CreateSchemaCommand	(	CreateSchemaStmt *	parsetree,
		const char *	queryString,
		int	stmt_location,
		int	stmt_len
	)

Definition at line 51 of file schemacmds.c.

References ACL_CREATE, aclcheck_error(), ACLCHECK_OK, allowSystemTableMods, AUTHOID, CreateSchemaStmt::authrole, PlannedStmt::canSetTag, check_is_member_of_role(), CMD_UTILITY, CommandCounterIncrement(), PlannedStmt::commandType, CurrentMemoryContext, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, EventTriggerCollectSimpleCommand(), get_database_name(), get_rolespec_oid(), GetOverrideSearchPath(), GETSTRUCT, GetUserIdAndSecContext(), HeapTupleIsValid, CreateSchemaStmt::if_not_exists, InvalidObjectAddress, InvalidOid, IsReservedName(), lcons_oid(), lfirst, makeNode, MyDatabaseId, NamespaceCreate(), NAMESPACENAME, NameStr, None_Receiver, NOTICE, OBJECT_DATABASE, ObjectAddressSet, ObjectIdGetDatum, pg_database_aclcheck(), PointerGetDatum, PopOverrideSearchPath(), PROCESS_UTILITY_SUBCOMMAND, ProcessUtility(), pstrdup(), PushOverrideSearchPath(), ReleaseSysCache(), CreateSchemaStmt::schemaname, OverrideSearchPath::schemas, SearchSysCache1(), SearchSysCacheExists1, SECURITY_LOCAL_USERID_CHANGE, SetUserIdAndSecContext(), prepared_statement::stmt, PlannedStmt::stmt_len, PlannedStmt::stmt_location, transformCreateSchemaStmt(), and PlannedStmt::utilityStmt.

Referenced by CreateExtensionInternal(), and ProcessUtilitySlow().

 {
     const char *schemaName = stmt->schemaname;
     Oid         namespaceId;
     OverrideSearchPath *overridePath;
     List       *parsetree_list;
     ListCell   *parsetree_item;
     Oid         owner_uid;
     Oid         saved_uid;
     int         save_sec_context;
     AclResult   aclresult;
     ObjectAddress address;
 
     GetUserIdAndSecContext(&saved_uid, &save_sec_context);
 
     /*
      * Who is supposed to own the new schema?
      */
     if (stmt->authrole)
         owner_uid = get_rolespec_oid(stmt->authrole, false);
     else
         owner_uid = saved_uid;
 
     /* fill schema name with the user name if not specified */
     if (!schemaName)
     {
         HeapTuple   tuple;
 
         tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(owner_uid));
         if (!HeapTupleIsValid(tuple))
             elog(ERROR, "cache lookup failed for role %u", owner_uid);
         schemaName =
             pstrdup(NameStr(((Form_pg_authid) GETSTRUCT(tuple))->rolname));
         ReleaseSysCache(tuple);
     }
 
     /*
      * To create a schema, must have schema-create privilege on the current
      * database and must be able to become the target role (this does not
      * imply that the target role itself must have create-schema privilege).
      * The latter provision guards against "giveaway" attacks.  Note that a
      * superuser will always have both of these privileges a fortiori.
      */
     aclresult = pg_database_aclcheck(MyDatabaseId, saved_uid, ACL_CREATE);
     if (aclresult != ACLCHECK_OK)
         aclcheck_error(aclresult, OBJECT_DATABASE,
                        get_database_name(MyDatabaseId));
 
     check_is_member_of_role(saved_uid, owner_uid);
 
     /* Additional check to protect reserved schema names */
     if (!allowSystemTableMods && IsReservedName(schemaName))
         ereport(ERROR,
                 (errcode(ERRCODE_RESERVED_NAME),
                  errmsg("unacceptable schema name \"%s\"", schemaName),
                  errdetail("The prefix \"pg_\" is reserved for system schemas.")));
 
     /*
      * If if_not_exists was given and the schema already exists, bail out.
      * (Note: we needn't check this when not if_not_exists, because
      * NamespaceCreate will complain anyway.)  We could do this before making
      * the permissions checks, but since CREATE TABLE IF NOT EXISTS makes its
      * creation-permission check first, we do likewise.
      */
     if (stmt->if_not_exists &&
         SearchSysCacheExists1(NAMESPACENAME, PointerGetDatum(schemaName)))
     {
         ereport(NOTICE,
                 (errcode(ERRCODE_DUPLICATE_SCHEMA),
                  errmsg("schema \"%s\" already exists, skipping",
                         schemaName)));
         return InvalidOid;
     }
 
     /*
      * If the requested authorization is different from the current user,
      * temporarily set the current user so that the object(s) will be created
      * with the correct ownership.
      *
      * (The setting will be restored at the end of this routine, or in case of
      * error, transaction abort will clean things up.)
      */
     if (saved_uid != owner_uid)
         SetUserIdAndSecContext(owner_uid,
                                save_sec_context | SECURITY_LOCAL_USERID_CHANGE);
 
     /* Create the schema's namespace */
     namespaceId = NamespaceCreate(schemaName, owner_uid, false);
 
     /* Advance cmd counter to make the namespace visible */
     CommandCounterIncrement();
 
     /*
      * Temporarily make the new namespace be the front of the search path, as
      * well as the default creation target namespace.  This will be undone at
      * the end of this routine, or upon error.
      */
     overridePath = GetOverrideSearchPath(CurrentMemoryContext);
     overridePath->schemas = lcons_oid(namespaceId, overridePath->schemas);
     /* XXX should we clear overridePath->useTemp? */
     PushOverrideSearchPath(overridePath);
 
     /*
      * Report the new schema to possibly interested event triggers.  Note we
      * must do this here and not in ProcessUtilitySlow because otherwise the
      * objects created below are reported before the schema, which would be
      * wrong.
      */
     ObjectAddressSet(address, NamespaceRelationId, namespaceId);
     EventTriggerCollectSimpleCommand(address, InvalidObjectAddress,
                                      (Node *) stmt);
 
     /*
      * Examine the list of commands embedded in the CREATE SCHEMA command, and
      * reorganize them into a sequentially executable order with no forward
      * references.  Note that the result is still a list of raw parsetrees ---
      * we cannot, in general, run parse analysis on one statement until we
      * have actually executed the prior ones.
      */
     parsetree_list = transformCreateSchemaStmt(stmt);
 
     /*
      * Execute each command contained in the CREATE SCHEMA.  Since the grammar
      * allows only utility commands in CREATE SCHEMA, there is no need to pass
      * them through parse_analyze() or the rewriter; we can just hand them
      * straight to ProcessUtility.
      */
     foreach(parsetree_item, parsetree_list)
     {
         Node       *stmt = (Node *) lfirst(parsetree_item);
         PlannedStmt *wrapper;
 
         /* need to make a wrapper PlannedStmt */
         wrapper = makeNode(PlannedStmt);
         wrapper->commandType = CMD_UTILITY;
         wrapper->canSetTag = false;
         wrapper->utilityStmt = stmt;
         wrapper->stmt_location = stmt_location;
         wrapper->stmt_len = stmt_len;
 
         /* do this step */
         ProcessUtility(wrapper,
                        queryString,
                        PROCESS_UTILITY_SUBCOMMAND,
                        NULL,
                        NULL,
                        None_Receiver,
                        NULL);
 
         /* make sure later steps can see the object created here */
         CommandCounterIncrement();
     }
 
     /* Reset search path to normal state */
     PopOverrideSearchPath();
 
     /* Reset current user and security context */
     SetUserIdAndSecContext(saved_uid, save_sec_context);
 
     return namespaceId;
 }

◆ RemoveSchemaById()

void RemoveSchemaById ( Oid schemaOid )

Definition at line 218 of file schemacmds.c.

References CatalogTupleDelete(), elog, ERROR, heap_close, heap_open(), HeapTupleIsValid, NAMESPACEOID, ObjectIdGetDatum, ReleaseSysCache(), RowExclusiveLock, SearchSysCache1(), and HeapTupleData::t_self.

Referenced by doDeletion().

 {
     Relation    relation;
     HeapTuple   tup;
 
     relation = heap_open(NamespaceRelationId, RowExclusiveLock);
 
     tup = SearchSysCache1(NAMESPACEOID,
                           ObjectIdGetDatum(schemaOid));
     if (!HeapTupleIsValid(tup)) /* should not happen */
         elog(ERROR, "cache lookup failed for namespace %u", schemaOid);
 
     CatalogTupleDelete(relation, &tup->t_self);
 
     ReleaseSysCache(tup);
 
     heap_close(relation, RowExclusiveLock);
 }

◆ RenameSchema()

ObjectAddress RenameSchema	(	const char *	oldname,
		const char *	newname
	)

Definition at line 242 of file schemacmds.c.

References ACL_CREATE, aclcheck_error(), ACLCHECK_NOT_OWNER, ACLCHECK_OK, allowSystemTableMods, CatalogTupleUpdate(), CStringGetDatum, ereport, errcode(), errdetail(), errmsg(), ERROR, get_database_name(), get_namespace_oid(), GETSTRUCT, GetUserId(), heap_close, heap_freetuple(), heap_open(), HeapTupleGetOid, HeapTupleIsValid, InvokeObjectPostAlterHook, IsReservedName(), MyDatabaseId, NAMESPACENAME, namestrcpy(), NoLock, OBJECT_DATABASE, OBJECT_SCHEMA, ObjectAddressSet, OidIsValid, pg_database_aclcheck(), pg_namespace_ownercheck(), RowExclusiveLock, SearchSysCacheCopy1, and HeapTupleData::t_self.

Referenced by ExecRenameStmt().