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/*-------------------------------------------------------------------------
*
* sequence.c
* Generic routines for sequence-related code.
*
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/sequence/sequence.c
*
*
* NOTES
* This file contains sequence_ routines that implement access to sequences
* (in contrast to other relation types like indexes).
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/relation.h"
#include "access/sequence.h"
#include "utils/rel.h"
static inline void validate_relation_kind(Relation r);
/* ----------------
* sequence_open - open a sequence relation by relation OID
*
* This is essentially relation_open plus check that the relation
* is a sequence.
* ----------------
*/
Relation
sequence_open(Oid relationId, LOCKMODE lockmode)
{
Relation r;
r = relation_open(relationId, lockmode);
validate_relation_kind(r);
return r;
}
/* ----------------
* sequence_close - close a sequence
*
* If lockmode is not "NoLock", we then release the specified lock.
*
* Note that it is often sensible to hold a lock beyond relation_close;
* in that case, the lock is released automatically at xact end.
* ----------------
*/
void
sequence_close(Relation relation, LOCKMODE lockmode)
{
relation_close(relation, lockmode);
}
/* ----------------
* validate_relation_kind - check the relation's kind
*
* Make sure relkind is from a sequence.
* ----------------
*/
static inline void
validate_relation_kind(Relation r)
{
if (r->rd_rel->relkind != RELKIND_SEQUENCE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot open relation \"%s\"",
RelationGetRelationName(r)),
errdetail_relkind_not_supported(r->rd_rel->relkind)));
}
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