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Restructure pg_opclass, pg_amop, and pg_amproc per previous discussions in

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pgsql-hackers.  pg_opclass now has a row for each opclass supported by each
index AM, not a row for each opclass name.  This allows pg_opclass to show
directly whether an AM supports an opclass, and furthermore makes it possible
to store additional information about an opclass that might be AM-dependent.
pg_opclass and pg_amop now store "lossy" and "haskeytype" information that we
previously expected the user to remember to provide in CREATE INDEX commands.
Lossiness is no longer an index-level property, but is associated with the
use of a particular operator in a particular index opclass.

Along the way, IndexSupportInitialize now uses the syscaches to retrieve
pg_amop and pg_amproc entries.  I find this reduces backend launch time by
about ten percent, at the cost of a couple more special cases in catcache.c's
IndexScanOK.

Initial work by Oleg Bartunov and Teodor Sigaev, further hacking by Tom Lane.

initdb forced.
This commit is contained in:
Tom Lane
2001-08-21 16:36:06 +00:00
parent c2d1566912
commit f933766ba7
60 changed files with 1918 additions and 1929 deletions
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17
src/backend/utils/cache/catcache.c vendored
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/catcache.c,v 1.81 2001/06/22 19:16:23 wieck Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/catcache.c,v 1.82 2001/08/21 16:36:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -18,6 +18,7 @@
#include "access/hash.h"
#include "access/heapam.h"
#include "access/valid.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_type.h"
#include "catalog/catname.h"
@@ -812,7 +813,7 @@ IndexScanOK(CatCache *cache, ScanKey cur_skey)
sd = heap_beginscan(rel, false, SnapshotNow, 1, &key);
ntp = heap_getnext(sd, 0);
if (!HeapTupleIsValid(ntp))
elog(ERROR, "SearchSelfReferences: %s not found in %s",
elog(ERROR, "IndexScanOK: %s not found in %s",
IndexRelidIndex, RelationRelationName);
indexSelfOid = ntp->t_data->t_oid;
heap_endscan(sd);
@@ -823,6 +824,16 @@ IndexScanOK(CatCache *cache, ScanKey cur_skey)
if (DatumGetObjectId(cur_skey[0].sk_argument) == indexSelfOid)
return false;
}
else if (cache->id == AMOPSTRATEGY ||
cache->id == AMPROCNUM)
{
/* Looking for an OID or INT2 btree operator or function? */
Oid lookup_oid = DatumGetObjectId(cur_skey[0].sk_argument);
if (lookup_oid == OID_BTREE_OPS_OID ||
lookup_oid == INT2_BTREE_OPS_OID)
return false;
}
else if (cache->id == OPEROID)
{
/* Looking for an OID comparison function? */
@@ -858,7 +869,7 @@ SearchCatCache(CatCache *cache,
MemoryContext oldcxt;
/*
* one-time startup overhead
* one-time startup overhead for each cache
*/
if (cache->cc_tupdesc == NULL)
CatalogCacheInitializeCache(cache);