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Rearrange fmgr.c and relcache so that it's possible to keep FmgrInfo

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lookup info in the relcache for index access method support functions.
This makes a huge difference for dynamically loaded support functions,
and should save a few cycles even for built-in ones.  Also tweak dfmgr.c
so that load_external_function is called only once, not twice, when
doing fmgr_info for a dynamically loaded function.  All per performance
gripe from Teodor Sigaev, 5-Oct-01.
This commit is contained in:
Tom Lane
2001-10-06 23:21:45 +00:00
parent a965750abf
commit 85801a4dbd
31 changed files with 424 additions and 390 deletions
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24
src/backend/access/hash/hashutil.c
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@@ -8,13 +8,14 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashutil.c,v 1.26 2001/02/22 21:48:49 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashutil.c,v 1.27 2001/10/06 23:21:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/hash.h"
#include "access/iqual.h"
@@ -27,8 +28,8 @@ _hash_mkscankey(Relation rel, IndexTuple itup, HashMetaPage metap)
int natts;
AttrNumber i;
Datum arg;
RegProcedure proc;
bool null;
FmgrInfo *procinfo;
bool isnull;
natts = rel->rd_rel->relnatts;
itupdesc = RelationGetDescr(rel);
@@ -37,10 +38,14 @@ _hash_mkscankey(Relation rel, IndexTuple itup, HashMetaPage metap)
for (i = 0; i < natts; i++)
{
arg = index_getattr(itup, i + 1, itupdesc, &null);
proc = metap->hashm_procid;
ScanKeyEntryInitialize(&skey[i],
0x0, (AttrNumber) (i + 1), proc, arg);
arg = index_getattr(itup, i + 1, itupdesc, &isnull);
procinfo = index_getprocinfo(rel, i + 1, HASHPROC);
ScanKeyEntryInitializeWithInfo(&skey[i],
0x0,
(AttrNumber) (i + 1),
procinfo,
CurrentMemoryContext,
arg);
}
return skey;
@@ -89,10 +94,13 @@ _hash_formitem(IndexTuple itup)
Bucket
_hash_call(Relation rel, HashMetaPage metap, Datum key)
{
FmgrInfo *procinfo;
uint32 n;
Bucket bucket;
n = DatumGetUInt32(OidFunctionCall1(metap->hashm_procid, key));
/* XXX assumes index has only one attribute */
procinfo = index_getprocinfo(rel, 1, HASHPROC);
n = DatumGetUInt32(FunctionCall1(procinfo, key));
bucket = n & metap->hashm_highmask;
if (bucket > metap->hashm_maxbucket)
bucket = bucket & metap->hashm_lowmask;