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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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30
src/backend/access/common/scankey.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/scankey.c,v 1.19 2001/06/01 02:41:35 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/common/scankey.c,v 1.20 2001/10/06 23:21:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -69,3 +69,31 @@ ScanKeyEntryInitialize(ScanKey entry,
Assert(ScanKeyEntryIsLegal(entry));
}
/*
* ScanKeyEntryInitializeWithInfo
* Initializes a scan key entry using an already-completed FmgrInfo
* function lookup record.
*
* mcxt is the memory context holding the scan key; it'll be used for
* any subsidiary info attached to the scankey's FmgrInfo record.
*/
void
ScanKeyEntryInitializeWithInfo(ScanKey entry,
bits16 flags,
AttrNumber attributeNumber,
FmgrInfo *finfo,
MemoryContext mcxt,
Datum argument)
{
Assert(PointerIsValid(entry));
Assert(RegProcedureIsValid(finfo->fn_oid));
entry->sk_flags = flags;
entry->sk_attno = attributeNumber;
entry->sk_procedure = finfo->fn_oid;
entry->sk_argument = argument;
fmgr_info_copy(&entry->sk_func, finfo, mcxt);
Assert(ScanKeyEntryIsLegal(entry));
}