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Standardize get_whatever_oid functions for other object types.

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- Rename TSParserGetPrsid to get_ts_parser_oid.
- Rename TSDictionaryGetDictid to get_ts_dict_oid.
- Rename TSTemplateGetTmplid to get_ts_template_oid.
- Rename TSConfigGetCfgid to get_ts_config_oid.
- Rename FindConversionByName to get_conversion_oid.
- Rename GetConstraintName to get_constraint_oid.
- Add new functions get_opclass_oid, get_opfamily_oid, get_rewrite_oid,
  get_rewrite_oid_without_relid, get_trigger_oid, and get_cast_oid.

The name of each function matches the corresponding catalog.

Thanks to KaiGai Kohei for the review.
This commit is contained in:
Robert Haas
2010-08-05 15:25:36 +00:00
parent 2a6ef3445c
commit fd1843ff89
22 changed files with 401 additions and 504 deletions
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86
src/backend/rewrite/rewriteSupport.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteSupport.c,v 1.69 2010/02/14 18:42:15 rhaas Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteSupport.c,v 1.70 2010/08/05 15:25:35 rhaas Exp $
*
*-------------------------------------------------------------------------
*/
@ -17,9 +17,14 @@
#include "access/heapam.h"
#include "catalog/indexing.h"
#include "catalog/pg_class.h"
#include "catalog/pg_rewrite.h"
#include "rewrite/rewriteSupport.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/syscache.h"
#include "utils/tqual.h"
/*
@ -86,3 +91,82 @@ SetRelationRuleStatus(Oid relationId, bool relHasRules,
heap_freetuple(tuple);
heap_close(relationRelation, RowExclusiveLock);
}
/*
* Find rule oid.
*
* If missing_ok is false, throw an error if rule name not found. If
* true, just return InvalidOid.
*/
Oid
get_rewrite_oid(Oid relid, const char *rulename, bool missing_ok)
{
HeapTuple tuple;
Oid ruleoid;
/* Find the rule's pg_rewrite tuple, get its OID */
tuple = SearchSysCache2(RULERELNAME,
ObjectIdGetDatum(relid),
PointerGetDatum(rulename));
if (!HeapTupleIsValid(tuple))
{
if (missing_ok)
return InvalidOid;
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" for relation \"%s\" does not exist",
rulename, get_rel_name(relid))));
}
Assert(relid == ((Form_pg_rewrite) GETSTRUCT(tuple))->ev_class);
ruleoid = HeapTupleGetOid(tuple);
ReleaseSysCache(tuple);
return ruleoid;
}
/*
* Find rule oid, given only a rule name but no rel OID.
*
* If there's more than one, it's an error. If there aren't any, that's an
* error, too. In general, this should be avoided - it is provided to support
* syntax that is compatible with pre-7.3 versions of PG, where rule names
* were unique across the entire database.
*/
Oid
get_rewrite_oid_without_relid(const char *rulename, Oid *reloid)
{
Relation RewriteRelation;
HeapScanDesc scanDesc;
ScanKeyData scanKeyData;
HeapTuple htup;
Oid ruleoid;
/* Search pg_rewrite for such a rule */
ScanKeyInit(&scanKeyData,
Anum_pg_rewrite_rulename,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(rulename));
RewriteRelation = heap_open(RewriteRelationId, AccessShareLock);
scanDesc = heap_beginscan(RewriteRelation, SnapshotNow, 1, &scanKeyData);
htup = heap_getnext(scanDesc, ForwardScanDirection);
if (!HeapTupleIsValid(htup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" does not exist", rulename)));
ruleoid = HeapTupleGetOid(htup);
if (reloid != NULL)
*reloid = ((Form_pg_rewrite) GETSTRUCT(htup))->ev_class;
if (HeapTupleIsValid(htup = heap_getnext(scanDesc, ForwardScanDirection)))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("there are multiple rules named \"%s\"", rulename),
errhint("Specify a relation name as well as a rule name.")));
heap_endscan(scanDesc);
heap_close(RewriteRelation, AccessShareLock);
return ruleoid;
}