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/*-------------------------------------------------------------------------
*
* pg_namespace.c
* routines to support manipulation of the pg_namespace relation
*
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/catalog/pg_namespace.c,v 1.18 2008/01/01 19:45:48 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/heapam.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/pg_namespace.h"
#include "utils/builtins.h"
#include "utils/syscache.h"
/* ----------------
* NamespaceCreate
* ---------------
*/
Oid
NamespaceCreate(const char *nspName, Oid ownerId)
{
Relation nspdesc;
HeapTuple tup;
Oid nspoid;
char nulls[Natts_pg_namespace];
Datum values[Natts_pg_namespace];
NameData nname;
TupleDesc tupDesc;
int i;
/* sanity checks */
if (!nspName)
elog(ERROR, "no namespace name supplied");
/* make sure there is no existing namespace of same name */
if (SearchSysCacheExists(NAMESPACENAME,
PointerGetDatum(nspName),
0, 0, 0))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_SCHEMA),
errmsg("schema \"%s\" already exists", nspName)));
/* initialize nulls and values */
for (i = 0; i < Natts_pg_namespace; i++)
{
nulls[i] = ' ';
values[i] = (Datum) NULL;
}
namestrcpy(&nname, nspName);
values[Anum_pg_namespace_nspname - 1] = NameGetDatum(&nname);
values[Anum_pg_namespace_nspowner - 1] = ObjectIdGetDatum(ownerId);
nulls[Anum_pg_namespace_nspacl - 1] = 'n';
nspdesc = heap_open(NamespaceRelationId, RowExclusiveLock);
tupDesc = nspdesc->rd_att;
tup = heap_formtuple(tupDesc, values, nulls);
nspoid = simple_heap_insert(nspdesc, tup);
Assert(OidIsValid(nspoid));
CatalogUpdateIndexes(nspdesc, tup);
heap_close(nspdesc, RowExclusiveLock);
/* Record dependency on owner */
recordDependencyOnOwner(NamespaceRelationId, nspoid, ownerId);
return nspoid;
}
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