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Wrap calls to SearchSysCache and related functions using macros.

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The purpose of this change is to eliminate the need for every caller
of SearchSysCache, SearchSysCacheCopy, SearchSysCacheExists,
GetSysCacheOid, and SearchSysCacheList to know the maximum number
of allowable keys for a syscache entry (currently 4).  This will
make it far easier to increase the maximum number of keys in a
future release should we choose to do so, and it makes the code
shorter, too.

Design and review by Tom Lane.
This commit is contained in:
Robert Haas
2010-02-14 18:42:19 +00:00
parent 1012492bc0
commit e26c539e9f
97 changed files with 1125 additions and 2061 deletions
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10
src/backend/commands/vacuum.c
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@@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.407 2010/02/09 21:43:30 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.408 2010/02/14 18:42:14 rhaas Exp $
*
*-------------------------------------------------------------------------
*/
@@ -498,9 +498,7 @@ vac_update_relstats(Relation relation,
rd = heap_open(RelationRelationId, RowExclusiveLock);
/* Fetch a copy of the tuple to scribble on */
ctup = SearchSysCacheCopy(RELOID,
ObjectIdGetDatum(relid),
0, 0, 0);
ctup = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relid));
if (!HeapTupleIsValid(ctup))
elog(ERROR, "pg_class entry for relid %u vanished during vacuuming",
relid);
@@ -644,9 +642,7 @@ vac_update_datfrozenxid(void)
relation = heap_open(DatabaseRelationId, RowExclusiveLock);
/* Fetch a copy of the tuple to scribble on */
tuple = SearchSysCacheCopy(DATABASEOID,
ObjectIdGetDatum(MyDatabaseId),
0, 0, 0);
tuple = SearchSysCacheCopy1(DATABASEOID, ObjectIdGetDatum(MyDatabaseId));
if (!HeapTupleIsValid(tuple))
elog(ERROR, "could not find tuple for database %u", MyDatabaseId);
dbform = (Form_pg_database) GETSTRUCT(tuple);