mirror of
https://github.com/postgres/postgres.git
synced 2025-04-24 10:47:04 +03:00
ae3129fd03
Frank Miles 7-Sep-01. This is really just sticking a finger in the dike. Frank's case works now, but we still couldn't support a recursive function returning a set. Really need to restructure querytrees and execution state so that the querytree is *read only*. We've run into this over and over and over again ... it has to happen sometime soon.
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* fcache.c
|
|
* Code for the 'function cache' used in Oper and Func nodes.
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* IDENTIFICATION
|
|
* $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/fcache.c,v 1.40 2001/09/21 00:11:31 tgl Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "utils/fcache.h"
|
|
|
|
|
|
/*
|
|
* Build a 'FunctionCache' struct given the PG_PROC oid.
|
|
*/
|
|
FunctionCachePtr
|
|
init_fcache(Oid foid, int nargs, MemoryContext fcacheCxt)
|
|
{
|
|
MemoryContext oldcontext;
|
|
FunctionCachePtr retval;
|
|
|
|
/* Safety check (should never fail, as parser should check sooner) */
|
|
if (nargs > FUNC_MAX_ARGS)
|
|
elog(ERROR, "init_fcache: too many arguments");
|
|
|
|
/* Switch to a context long-lived enough for the fcache entry */
|
|
oldcontext = MemoryContextSwitchTo(fcacheCxt);
|
|
|
|
retval = (FunctionCachePtr) palloc(sizeof(FunctionCache));
|
|
MemSet(retval, 0, sizeof(FunctionCache));
|
|
|
|
/* Set up the primary fmgr lookup information */
|
|
fmgr_info(foid, &(retval->func));
|
|
|
|
/* Initialize additional info */
|
|
retval->setArgsValid = false;
|
|
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
return retval;
|
|
}
|