fcache.c

/*-------------------------------------------------------------------------
 *
 * fcache.c
 *	  Code for the 'function cache' used in Oper and Func nodes....
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/fcache.c,v 1.22 1999/05/10 00:46:06 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include <nodes/parsenodes.h>
#include <fmgr.h>

#include "access/htup.h"
#include "utils/catcache.h"
#include "utils/syscache.h"
#include "catalog/pg_type.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_language.h"
#include "catalog/pg_class.h"
#include "parser/parsetree.h"	/* for getrelname() */
#include "utils/builtins.h"
#include "utils/fcache.h"
#include "utils/fcache2.h"
#include "nodes/primnodes.h"
#include "nodes/execnodes.h"
#ifndef HAVE_MEMMOVE
#include <regex/utils.h>
#else
#include <string.h>
#endif

static Oid	GetDynamicFuncArgType(Var *arg, ExprContext *econtext);
static FunctionCachePtr init_fcache(Oid foid,
			bool use_syscache,
			List *argList,
			ExprContext *econtext);

/*-----------------------------------------------------------------
 *
 * Initialize the 'FunctionCache' given the PG_PROC oid.
 *
 *
 * NOTE:  This function can be called when the system cache is being
 *		  initialized.	Therefore, use_syscache should ONLY be true
 *		  when the function return type is interesting (ie: set_fcache).
 *-----------------------------------------------------------------
 */
#define FuncArgTypeIsDynamic(arg) \
	(IsA(arg,Var) && ((Var*)arg)->varattno == InvalidAttrNumber)

static Oid
GetDynamicFuncArgType(Var *arg, ExprContext *econtext)
{
	char	   *relname;
	int			rtid;
	HeapTuple	tup;

	Assert(IsA(arg, Var));

	rtid = ((Var *) arg)->varno;
	relname = (char *) getrelname(rtid, econtext->ecxt_range_table);


	tup = SearchSysCacheTuple(TYPNAME,