pg_namespace.c File Reference

#include "postgres.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_namespace.h"
#include "utils/builtins.h"
#include "utils/rel.h"
#include "utils/syscache.h"

Include dependency graph for pg_namespace.c:

Go to the source code of this file.

Functions
Oid	NamespaceCreate (const char *nspName, Oid ownerId, bool isTemp)

Function Documentation

NamespaceCreate()

Oid NamespaceCreate	(	const char *	nspName,
		Oid	ownerId,
		bool	isTemp
	)

Definition at line 43 of file pg_namespace.c.

{
    Relation    nspdesc;
    HeapTuple   tup;
    Oid         nspoid;
    bool        nulls[Natts_pg_namespace];
    Datum       values[Natts_pg_namespace];
    NameData    nname;
    TupleDesc   tupDesc;
    ObjectAddress myself;
    int         i;
    Acl        *nspacl;
 
    /* sanity checks */
    if (!nspName)
        elog(ERROR, "no namespace name supplied");
 
    /* make sure there is no existing namespace of same name */
    if (SearchSysCacheExists1(NAMESPACENAME, PointerGetDatum(nspName)))
        ereport(ERROR,
                (errcode(ERRCODE_DUPLICATE_SCHEMA),
                 errmsg("schema \"%s\" already exists", nspName)));
 
    if (!isTemp)
        nspacl = get_user_default_acl(OBJECT_SCHEMA, ownerId,
                                      InvalidOid);
    else
        nspacl = NULL;
 
    nspdesc = table_open(NamespaceRelationId, RowExclusiveLock);
    tupDesc = nspdesc->rd_att;
 
    /* initialize nulls and values */
    for (i = 0; i < Natts_pg_namespace; i++)
    {
        nulls[i] = false;
        values[i] = (Datum) 0;
    }
 
    nspoid = GetNewOidWithIndex(nspdesc, NamespaceOidIndexId,
                                Anum_pg_namespace_oid);
    values[Anum_pg_namespace_oid - 1] = ObjectIdGetDatum(nspoid);
    namestrcpy(&nname, nspName);
    values[Anum_pg_namespace_nspname - 1] = NameGetDatum(&nname);
    values[Anum_pg_namespace_nspowner - 1] = ObjectIdGetDatum(ownerId);
    if (nspacl != NULL)
        values[Anum_pg_namespace_nspacl - 1] = PointerGetDatum(nspacl);
    else
        nulls[Anum_pg_namespace_nspacl - 1] = true;
 
 
    tup = heap_form_tuple(tupDesc, values, nulls);
 
    CatalogTupleInsert(nspdesc, tup);
    Assert(OidIsValid(nspoid));
 
    table_close(nspdesc, RowExclusiveLock);
 
    /* Record dependencies */
    myself.classId = NamespaceRelationId;
    myself.objectId = nspoid;
    myself.objectSubId = 0;
 
    /* dependency on owner */
    recordDependencyOnOwner(NamespaceRelationId, nspoid, ownerId);
 
    /* dependencies on roles mentioned in default ACL */
    recordDependencyOnNewAcl(NamespaceRelationId, nspoid, 0, ownerId, nspacl);
 
    /* dependency on extension ... but not for magic temp schemas */
    if (!isTemp)
        recordDependencyOnCurrentExtension(&myself, false);
 
    /* Post creation hook for new schema */
    InvokeObjectPostCreateHook(NamespaceRelationId, nspoid, 0);
 
    return nspoid;
}

References Assert, CatalogTupleInsert(), elog, ereport, errcode(), errmsg(), ERROR, fb(), get_user_default_acl(), GetNewOidWithIndex(), heap_form_tuple(), i, InvalidOid, InvokeObjectPostCreateHook, NameGetDatum(), namestrcpy(), OBJECT_SCHEMA, ObjectIdGetDatum(), OidIsValid, PointerGetDatum(), recordDependencyOnCurrentExtension(), recordDependencyOnNewAcl(), recordDependencyOnOwner(), RowExclusiveLock, SearchSysCacheExists1, table_close(), table_open(), and values.

Referenced by CreateSchemaCommand(), and InitTempTableNamespace().