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1545 lines
39 KiB
C
1545 lines
39 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_func.c
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* handle function calls in parser
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.65 1999/12/16 22:19:48 wieck Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/genam.h"
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#include "access/heapam.h"
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#include "catalog/catname.h"
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#include "catalog/indexing.h"
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#include "catalog/pg_aggregate.h"
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#include "catalog/pg_inherits.h"
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#include "catalog/pg_proc.h"
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#include "miscadmin.h"
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#include "nodes/makefuncs.h"
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#include "nodes/pg_list.h"
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#include "nodes/relation.h"
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#include "parser/parse_agg.h"
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#include "parser/parse_coerce.h"
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#include "parser/parse_expr.h"
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#include "parser/parse_func.h"
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#include "parser/parse_relation.h"
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#include "parser/parse_target.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/lsyscache.h"
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#include "utils/syscache.h"
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static Node *ParseComplexProjection(ParseState *pstate,
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char *funcname,
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Node *first_arg,
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bool *attisset);
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static Oid **argtype_inherit(int nargs, Oid *oid_array);
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static int find_inheritors(Oid relid, Oid **supervec);
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static CandidateList func_get_candidates(char *funcname, int nargs);
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static bool
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func_get_detail(char *funcname,
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int nargs,
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Oid *oid_array,
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Oid *funcid, /* return value */
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Oid *rettype, /* return value */
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bool *retset, /* return value */
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Oid **true_typeids);
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static Oid **gen_cross_product(InhPaths *arginh, int nargs);
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static void make_arguments(ParseState *pstate,
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int nargs,
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List *fargs,
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Oid *input_typeids,
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Oid *function_typeids);
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static int match_argtypes(int nargs,
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Oid *input_typeids,
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CandidateList function_typeids,
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CandidateList *candidates);
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static List *setup_tlist(char *attname, Oid relid);
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static Oid *func_select_candidate(int nargs, Oid *input_typeids,
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CandidateList candidates);
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static int agg_get_candidates(char *aggname, Oid typeId, CandidateList *candidates);
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static Oid agg_select_candidate(Oid typeid, CandidateList candidates);
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#define ISCOMPLEX(type) (typeidTypeRelid(type) ? true : false)
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/*
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** ParseNestedFuncOrColumn
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** Given a nested dot expression (i.e. (relation func ... attr), build up
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** a tree with of Iter and Func nodes.
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*/
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Node *
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ParseNestedFuncOrColumn(ParseState *pstate, Attr *attr, int *curr_resno, int precedence)
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{
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List *mutator_iter;
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Node *retval = NULL;
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if (attr->paramNo != NULL)
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{
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Param *param = (Param *) transformExpr(pstate, (Node *) attr->paramNo, EXPR_RELATION_FIRST);
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retval = ParseFuncOrColumn(pstate, strVal(lfirst(attr->attrs)),
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lcons(param, NIL),
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false, false,
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curr_resno,
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precedence);
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}
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else
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{
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Ident *ident = makeNode(Ident);
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ident->name = attr->relname;
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ident->isRel = TRUE;
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retval = ParseFuncOrColumn(pstate, strVal(lfirst(attr->attrs)),
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lcons(ident, NIL),
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false, false,
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curr_resno,
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precedence);
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}
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/* Do more attributes follow this one? */
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foreach(mutator_iter, lnext(attr->attrs))
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{
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retval = ParseFuncOrColumn(pstate, strVal(lfirst(mutator_iter)),
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lcons(retval, NIL),
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false, false,
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curr_resno,
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precedence);
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}
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return retval;
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}
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static int
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agg_get_candidates(char *aggname,
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Oid typeId,
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CandidateList *candidates)
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{
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CandidateList current_candidate;
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Relation pg_aggregate_desc;
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HeapScanDesc pg_aggregate_scan;
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HeapTuple tup;
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Form_pg_aggregate agg;
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int ncandidates = 0;
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static ScanKeyData aggKey[1] = {
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{0, Anum_pg_aggregate_aggname, F_NAMEEQ}};
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*candidates = NULL;
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fmgr_info(F_NAMEEQ, (FmgrInfo *) &aggKey[0].sk_func);
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aggKey[0].sk_argument = NameGetDatum(aggname);
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pg_aggregate_desc = heap_openr(AggregateRelationName, AccessShareLock);
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pg_aggregate_scan = heap_beginscan(pg_aggregate_desc,
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0,
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SnapshotSelf, /* ??? */
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1,
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aggKey);
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while (HeapTupleIsValid(tup = heap_getnext(pg_aggregate_scan, 0)))
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{
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current_candidate = (CandidateList) palloc(sizeof(struct _CandidateList));
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current_candidate->args = (Oid *) palloc(sizeof(Oid));
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agg = (Form_pg_aggregate) GETSTRUCT(tup);
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current_candidate->args[0] = agg->aggbasetype;
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current_candidate->next = *candidates;
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*candidates = current_candidate;
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ncandidates++;
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}
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heap_endscan(pg_aggregate_scan);
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heap_close(pg_aggregate_desc, AccessShareLock);
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return ncandidates;
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} /* agg_get_candidates() */
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/* agg_select_candidate()
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* Try to choose only one candidate aggregate function from a list of possibles.
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*/
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static Oid
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agg_select_candidate(Oid typeid, CandidateList candidates)
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{
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CandidateList current_candidate;
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CandidateList last_candidate;
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Oid current_typeid;
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int ncandidates;
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CATEGORY category,
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current_category;
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/*
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* Look for candidates which allow coersion and have a preferred type.
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* Keep all candidates if none match.
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*/
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category = TypeCategory(typeid);
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ncandidates = 0;
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last_candidate = NULL;
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for (current_candidate = candidates;
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current_candidate != NULL;
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current_candidate = current_candidate->next)
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{
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current_typeid = current_candidate->args[0];
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current_category = TypeCategory(current_typeid);
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if ((current_category == category)
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&& IsPreferredType(current_category, current_typeid)
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&& can_coerce_type(1, &typeid, ¤t_typeid))
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{
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/* only one so far? then keep it... */
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if (last_candidate == NULL)
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{
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candidates = current_candidate;
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last_candidate = current_candidate;
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ncandidates = 1;
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}
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/* otherwise, keep this one too... */
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else
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{
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last_candidate->next = current_candidate;
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last_candidate = current_candidate;
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ncandidates++;
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}
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}
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/* otherwise, don't bother keeping this one around... */
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else if (last_candidate != NULL)
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last_candidate->next = NULL;
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}
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return ((ncandidates == 1) ? candidates->args[0] : 0);
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} /* agg_select_candidate() */
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/*
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* parse function
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*/
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Node *
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ParseFuncOrColumn(ParseState *pstate, char *funcname, List *fargs,
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bool agg_star, bool agg_distinct,
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int *curr_resno, int precedence)
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{
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Oid rettype = InvalidOid;
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Oid argrelid = InvalidOid;
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Oid funcid = InvalidOid;
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List *i = NIL;
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Node *first_arg = NULL;
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char *relname = NULL;
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char *refname = NULL;
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Relation rd;
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Oid relid;
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int nargs = length(fargs);
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Func *funcnode;
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Oid oid_array[MAXFARGS];
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Oid *true_oid_array;
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Node *retval;
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bool retset;
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bool must_be_agg = agg_star || agg_distinct;
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bool attisset = false;
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Oid toid = InvalidOid;
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Expr *expr;
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if (fargs)
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{
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first_arg = lfirst(fargs);
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if (first_arg == NULL)
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elog(ERROR, "Function '%s' does not allow NULL input", funcname);
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}
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/*
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* check for projection methods: if function takes one argument, and
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* that argument is a relation, param, or PQ function returning a
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* complex * type, then the function could be a projection.
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*/
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/* We only have one parameter, and it's not got aggregate decoration */
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if (nargs == 1 && !must_be_agg)
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{
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/* Is it a plain Relation name from the parser? */
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if (IsA(first_arg, Ident) && ((Ident *) first_arg)->isRel)
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{
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RangeTblEntry *rte;
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Ident *ident = (Ident *) first_arg;
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/*
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* first arg is a relation. This could be a projection.
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*/
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refname = ident->name;
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rte = refnameRangeTableEntry(pstate, refname);
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if (rte == NULL)
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{
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rte = addRangeTableEntry(pstate, refname, refname,
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FALSE, FALSE, TRUE);
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#ifdef WARN_FROM
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elog(NOTICE,"Adding missing FROM-clause entry%s for table %s",
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pstate->parentParseState != NULL ? " in subquery" : "",
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refname);
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#endif
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}
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relname = rte->relname;
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relid = rte->relid;
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/*
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* If the attr isn't a set, just make a var for it. If it is
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* a set, treat it like a function and drop through.
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*/
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if (get_attnum(relid, funcname) != InvalidAttrNumber)
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{
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return (Node *) make_var(pstate,
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relid,
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refname,
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funcname);
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}
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/* else drop through - attr is a set */
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}
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else if (ISCOMPLEX(exprType(first_arg)))
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{
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/*
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* Attempt to handle projection of a complex argument. If
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* ParseComplexProjection can't handle the projection, we have
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* to keep going.
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*/
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retval = ParseComplexProjection(pstate,
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funcname,
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first_arg,
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&attisset);
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if (attisset)
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{
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toid = exprType(first_arg);
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rd = heap_openr(typeidTypeName(toid), NoLock);
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if (RelationIsValid(rd))
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{
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relname = RelationGetRelationName(rd);
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heap_close(rd, NoLock);
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}
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else
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elog(ERROR, "Type '%s' is not a relation type",
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typeidTypeName(toid));
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argrelid = typeidTypeRelid(toid);
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/*
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* A projection contains either an attribute name or "*".
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*/
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if ((get_attnum(argrelid, funcname) == InvalidAttrNumber)
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&& strcmp(funcname, "*"))
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elog(ERROR, "Functions on sets are not yet supported");
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}
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if (retval)
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return retval;
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}
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}
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if (nargs == 1 || must_be_agg)
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{
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/*
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* See if it's an aggregate.
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*/
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Oid basetype;
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int ncandidates;
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CandidateList candidates;
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/* We don't presently cope with, eg, foo(DISTINCT x,y) */
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if (nargs != 1)
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elog(ERROR, "Aggregate functions may only have one parameter");
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/*
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* the aggregate COUNT is a special case, ignore its base
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* type. Treat it as zero. XXX mighty ugly --- FIXME
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*/
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if (strcmp(funcname, "count") == 0)
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basetype = 0;
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else
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basetype = exprType(lfirst(fargs));
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/* try for exact match first... */
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if (SearchSysCacheTuple(AGGNAME,
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PointerGetDatum(funcname),
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ObjectIdGetDatum(basetype),
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0, 0))
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return (Node *) ParseAgg(pstate, funcname, basetype,
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fargs, agg_star, agg_distinct,
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precedence);
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/*
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* No exact match yet, so see if there is another entry in the
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* aggregate table which is compatible. - thomas 1998-12-05
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*/
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ncandidates = agg_get_candidates(funcname, basetype, &candidates);
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if (ncandidates > 0)
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{
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Oid type;
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type = agg_select_candidate(basetype, candidates);
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if (OidIsValid(type))
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{
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lfirst(fargs) = coerce_type(pstate, lfirst(fargs),
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basetype, type, -1);
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basetype = type;
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return (Node *) ParseAgg(pstate, funcname, basetype,
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fargs, agg_star, agg_distinct,
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precedence);
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}
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else
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{
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/* Multiple possible matches --- give up */
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elog(ERROR, "Unable to select an aggregate function %s(%s)",
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funcname, typeidTypeName(basetype));
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}
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}
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if (must_be_agg)
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{
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/*
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* No matching agg, but we had '*' or DISTINCT, so a plain
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* function could not have been meant.
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*/
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elog(ERROR, "There is no aggregate function %s(%s)",
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funcname, typeidTypeName(basetype));
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}
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}
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/*
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* See if this is a single argument function with the function
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* name also a type name and the input argument and type name
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* binary compatible... This means that you are trying for a
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* type conversion which does not need to take place, so we'll
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* just pass through the argument itself. (make this clearer
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* with some extra brackets - thomas 1998-12-05)
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*/
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if (nargs == 1)
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{
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Type tp;
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tp = SearchSysCacheTuple(TYPENAME,
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PointerGetDatum(funcname),
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0, 0, 0);
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if (HeapTupleIsValid(tp) &&
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IS_BINARY_COMPATIBLE(typeTypeId(tp), exprType(lfirst(fargs))))
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{
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/* XXX FIXME: probably need to change expression's marked type? */
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return (Node *) lfirst(fargs);
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}
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}
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/*
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* If we dropped through to here it's really a function (or a set,
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* which is implemented as a function). Extract arg type info and
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* transform relation name arguments into varnodes of the appropriate
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* form.
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*/
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MemSet(oid_array, 0, MAXFARGS * sizeof(Oid));
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nargs = 0;
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foreach(i, fargs)
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{
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int vnum;
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RangeTblEntry *rte;
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Node *pair = lfirst(i);
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if (nodeTag(pair) == T_Ident && ((Ident *) pair)->isRel)
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{
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/*
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* a relation
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*/
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refname = ((Ident *) pair)->name;
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rte = refnameRangeTableEntry(pstate, refname);
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if (rte == NULL)
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{
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rte = addRangeTableEntry(pstate, refname, refname,
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FALSE, FALSE, TRUE);
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#ifdef WARN_FROM
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elog(NOTICE,"Adding missing FROM-clause entry%s for table %s",
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pstate->parentParseState != NULL ? " in subquery" : "",
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refname);
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#endif
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}
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relname = rte->relname;
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vnum = refnameRangeTablePosn(pstate, rte->refname, NULL);
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/*
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* for func(relname), the param to the function is the tuple
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* under consideration. we build a special VarNode to reflect
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* this -- it has varno set to the correct range table entry,
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* but has varattno == 0 to signal that the whole tuple is the
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* argument.
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*/
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toid = typeTypeId(typenameType(relname));
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/* replace it in the arg list */
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lfirst(fargs) = makeVar(vnum, 0, toid, -1, 0);
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}
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else if (!attisset)
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{ /* set functions don't have parameters */
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/*
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* any function args which are typed "unknown", but aren't
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* constants, we don't know what to do with, because we can't
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* cast them - jolly
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*/
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if (exprType(pair) == UNKNOWNOID && !IsA(pair, Const))
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elog(ERROR, "There is no function '%s'"
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" with argument #%d of type UNKNOWN",
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funcname, nargs+1);
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else
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toid = exprType(pair);
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}
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|
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/* Most of the rest of the parser just assumes that functions do not
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* have more than MAXFARGS parameters. We have to test here to protect
|
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* against array overruns, etc.
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*/
|
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if (nargs >= MAXFARGS)
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elog(ERROR, "Cannot pass more than %d arguments to a function",
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MAXFARGS);
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oid_array[nargs++] = toid;
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}
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|
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/*
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* func_get_detail looks up the function in the catalogs, does
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* disambiguation for polymorphic functions, handles inheritance, and
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* returns the funcid and type and set or singleton status of the
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* function's return value. it also returns the true argument types
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* to the function. if func_get_detail returns true, the function
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* exists. otherwise, there was an error.
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*/
|
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if (attisset)
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{ /* we know all of these fields already */
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|
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/*
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|
* We create a funcnode with a placeholder function SetEval.
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* SetEval() never actually gets executed. When the function
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* evaluation routines see it, they use the funcid projected out
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* from the relation as the actual function to call. Example:
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* retrieve (emp.mgr.name) The plan for this will scan the emp
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* relation, projecting out the mgr attribute, which is a funcid.
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|
* This function is then called (instead of SetEval) and "name" is
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* projected from its result.
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*/
|
|
funcid = F_SETEVAL;
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rettype = toid;
|
|
retset = true;
|
|
true_oid_array = oid_array;
|
|
}
|
|
else
|
|
{
|
|
bool exists;
|
|
|
|
exists = func_get_detail(funcname, nargs, oid_array, &funcid,
|
|
&rettype, &retset, &true_oid_array);
|
|
if (!exists)
|
|
elog(ERROR, "No such function '%s' with the specified attributes",
|
|
funcname);
|
|
|
|
}
|
|
|
|
/* got it */
|
|
funcnode = makeNode(Func);
|
|
funcnode->funcid = funcid;
|
|
funcnode->functype = rettype;
|
|
funcnode->funcisindex = false;
|
|
funcnode->funcsize = 0;
|
|
funcnode->func_fcache = NULL;
|
|
funcnode->func_tlist = NIL;
|
|
funcnode->func_planlist = NIL;
|
|
|
|
/* perform the necessary typecasting */
|
|
make_arguments(pstate, nargs, fargs, oid_array, true_oid_array);
|
|
|
|
/*
|
|
* for functions returning base types, we want to project out the
|
|
* return value. set up a target list to do that. the executor will
|
|
* ignore these for c functions, and do the right thing for postquel
|
|
* functions.
|
|
*/
|
|
|
|
if (typeidTypeRelid(rettype) == InvalidOid)
|
|
funcnode->func_tlist = setup_base_tlist(rettype);
|
|
|
|
/*
|
|
* For sets, we want to make a targetlist to project out this
|
|
* attribute of the set tuples.
|
|
*/
|
|
if (attisset)
|
|
{
|
|
if (!strcmp(funcname, "*"))
|
|
funcnode->func_tlist = expandAll(pstate, relname, refname, curr_resno);
|
|
else
|
|
{
|
|
funcnode->func_tlist = setup_tlist(funcname, argrelid);
|
|
rettype = get_atttype(argrelid, get_attnum(argrelid, funcname));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Sequence handling.
|
|
*/
|
|
if (funcid == F_NEXTVAL ||
|
|
funcid == F_CURRVAL ||
|
|
funcid == F_SETVAL)
|
|
{
|
|
Const *seq;
|
|
char *seqrel;
|
|
text *seqname;
|
|
int32 aclcheck_result = -1;
|
|
|
|
Assert(nargs == ((funcid == F_SETVAL) ? 2 : 1));
|
|
seq = (Const *) lfirst(fargs);
|
|
if (!IsA((Node *) seq, Const))
|
|
elog(ERROR, "Only constant sequence names are acceptable for function '%s'", funcname);
|
|
|
|
seqrel = textout((text *) DatumGetPointer(seq->constvalue));
|
|
/* Do we have nextval('"Aa"')? */
|
|
if (strlen(seqrel) >= 2 &&
|
|
seqrel[0] == '\"' && seqrel[strlen(seqrel) - 1] == '\"')
|
|
{
|
|
/* strip off quotes, keep case */
|
|
seqrel = pstrdup(seqrel + 1);
|
|
seqrel[strlen(seqrel) - 1] = '\0';
|
|
pfree(DatumGetPointer(seq->constvalue));
|
|
seq->constvalue = (Datum) textin(seqrel);
|
|
}
|
|
else
|
|
{
|
|
pfree(seqrel);
|
|
seqname = lower((text *) DatumGetPointer(seq->constvalue));
|
|
pfree(DatumGetPointer(seq->constvalue));
|
|
seq->constvalue = PointerGetDatum(seqname);
|
|
seqrel = textout(seqname);
|
|
}
|
|
|
|
if ((aclcheck_result = pg_aclcheck(seqrel, GetPgUserName(),
|
|
(((funcid == F_NEXTVAL) || (funcid == F_SETVAL)) ?
|
|
ACL_WR : ACL_RD)))
|
|
!= ACLCHECK_OK)
|
|
elog(ERROR, "%s.%s: %s",
|
|
seqrel, funcname, aclcheck_error_strings[aclcheck_result]);
|
|
|
|
pfree(seqrel);
|
|
|
|
if (funcid == F_NEXTVAL && pstate->p_in_where_clause)
|
|
elog(ERROR, "Sequence function nextval is not allowed in WHERE clauses");
|
|
if (funcid == F_SETVAL && pstate->p_in_where_clause)
|
|
elog(ERROR, "Sequence function setval is not allowed in WHERE clauses");
|
|
}
|
|
|
|
expr = makeNode(Expr);
|
|
expr->typeOid = rettype;
|
|
expr->opType = FUNC_EXPR;
|
|
expr->oper = (Node *) funcnode;
|
|
expr->args = fargs;
|
|
retval = (Node *) expr;
|
|
|
|
/*
|
|
* if the function returns a set of values, then we need to iterate
|
|
* over all the returned values in the executor, so we stick an iter
|
|
* node here. if it returns a singleton, then we don't need the iter
|
|
* node.
|
|
*/
|
|
|
|
if (retset)
|
|
{
|
|
Iter *iter = makeNode(Iter);
|
|
|
|
iter->itertype = rettype;
|
|
iter->iterexpr = retval;
|
|
retval = (Node *) iter;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
/* func_get_candidates()
|
|
* get a list of all argument type vectors for which a function named
|
|
* funcname taking nargs arguments exists
|
|
*/
|
|
static CandidateList
|
|
func_get_candidates(char *funcname, int nargs)
|
|
{
|
|
Relation heapRelation;
|
|
Relation idesc;
|
|
ScanKeyData skey;
|
|
HeapTupleData tuple;
|
|
IndexScanDesc sd;
|
|
RetrieveIndexResult indexRes;
|
|
Form_pg_proc pgProcP;
|
|
CandidateList candidates = NULL;
|
|
CandidateList current_candidate;
|
|
int i;
|
|
|
|
heapRelation = heap_openr(ProcedureRelationName, AccessShareLock);
|
|
ScanKeyEntryInitialize(&skey,
|
|
(bits16) 0x0,
|
|
(AttrNumber) 1,
|
|
(RegProcedure) F_NAMEEQ,
|
|
(Datum) funcname);
|
|
|
|
idesc = index_openr(ProcedureNameIndex);
|
|
|
|
sd = index_beginscan(idesc, false, 1, &skey);
|
|
|
|
do
|
|
{
|
|
indexRes = index_getnext(sd, ForwardScanDirection);
|
|
if (indexRes)
|
|
{
|
|
Buffer buffer;
|
|
|
|
tuple.t_datamcxt = NULL;
|
|
tuple.t_data = NULL;
|
|
tuple.t_self = indexRes->heap_iptr;
|
|
heap_fetch(heapRelation, SnapshotNow, &tuple, &buffer);
|
|
pfree(indexRes);
|
|
if (tuple.t_data != NULL)
|
|
{
|
|
pgProcP = (Form_pg_proc) GETSTRUCT(&tuple);
|
|
if (pgProcP->pronargs == nargs)
|
|
{
|
|
current_candidate = (CandidateList)
|
|
palloc(sizeof(struct _CandidateList));
|
|
current_candidate->args = (Oid *)
|
|
palloc(MAXFARGS * sizeof(Oid));
|
|
MemSet(current_candidate->args, 0, MAXFARGS * sizeof(Oid));
|
|
for (i = 0; i < nargs; i++)
|
|
current_candidate->args[i] = pgProcP->proargtypes[i];
|
|
|
|
current_candidate->next = candidates;
|
|
candidates = current_candidate;
|
|
}
|
|
ReleaseBuffer(buffer);
|
|
}
|
|
}
|
|
} while (indexRes);
|
|
|
|
index_endscan(sd);
|
|
index_close(idesc);
|
|
heap_close(heapRelation, AccessShareLock);
|
|
|
|
return candidates;
|
|
}
|
|
|
|
|
|
/* match_argtypes()
|
|
* Given a list of possible typeid arrays to a function and an array of
|
|
* input typeids, produce a shortlist of those function typeid arrays
|
|
* that match the input typeids (either exactly or by coercion), and
|
|
* return the number of such arrays
|
|
*/
|
|
static int
|
|
match_argtypes(int nargs,
|
|
Oid *input_typeids,
|
|
CandidateList function_typeids,
|
|
CandidateList *candidates) /* return value */
|
|
{
|
|
CandidateList current_candidate;
|
|
CandidateList matching_candidate;
|
|
Oid *current_typeids;
|
|
int ncandidates = 0;
|
|
|
|
*candidates = NULL;
|
|
|
|
for (current_candidate = function_typeids;
|
|
current_candidate != NULL;
|
|
current_candidate = current_candidate->next)
|
|
{
|
|
current_typeids = current_candidate->args;
|
|
if (can_coerce_type(nargs, input_typeids, current_typeids))
|
|
{
|
|
matching_candidate = (CandidateList)
|
|
palloc(sizeof(struct _CandidateList));
|
|
matching_candidate->args = current_typeids;
|
|
matching_candidate->next = *candidates;
|
|
*candidates = matching_candidate;
|
|
ncandidates++;
|
|
}
|
|
}
|
|
|
|
return ncandidates;
|
|
} /* match_argtypes() */
|
|
|
|
|
|
/* func_select_candidate()
|
|
* Given the input argtype array and more than one candidate
|
|
* for the function argtype array, attempt to resolve the conflict.
|
|
* returns the selected argtype array if the conflict can be resolved,
|
|
* otherwise returns NULL.
|
|
*
|
|
* If all input Oids are UNKNOWNOID, then try matching with TEXTOID.
|
|
* Otherwise, could return first function arguments on list of candidates.
|
|
* But for now, return NULL and make the user give a better hint.
|
|
* - thomas 1998-03-17
|
|
*/
|
|
static Oid *
|
|
func_select_candidate(int nargs,
|
|
Oid *input_typeids,
|
|
CandidateList candidates)
|
|
{
|
|
CandidateList current_candidate;
|
|
CandidateList last_candidate;
|
|
Oid *current_typeids;
|
|
int i;
|
|
|
|
int ncandidates;
|
|
int nbestMatch,
|
|
nmatch,
|
|
nident;
|
|
|
|
CATEGORY slot_category,
|
|
current_category;
|
|
Oid slot_type,
|
|
current_type;
|
|
|
|
/*
|
|
* Run through all candidates and keep those with the most matches
|
|
* on explicit types. Keep all candidates if none match.
|
|
*/
|
|
ncandidates = 0;
|
|
nbestMatch = 0;
|
|
last_candidate = NULL;
|
|
for (current_candidate = candidates;
|
|
current_candidate != NULL;
|
|
current_candidate = current_candidate->next)
|
|
{
|
|
current_typeids = current_candidate->args;
|
|
nmatch = 0;
|
|
nident = 0;
|
|
for (i = 0; i < nargs; i++)
|
|
{
|
|
if ((input_typeids[i] != UNKNOWNOID)
|
|
&& (current_typeids[i] == input_typeids[i]))
|
|
nmatch++;
|
|
else if (IS_BINARY_COMPATIBLE(current_typeids[i], input_typeids[i]))
|
|
nident++;
|
|
}
|
|
|
|
if ((nmatch + nident) == nargs)
|
|
return current_candidate->args;
|
|
|
|
if ((nmatch > nbestMatch) || (last_candidate == NULL))
|
|
{
|
|
nbestMatch = nmatch;
|
|
candidates = current_candidate;
|
|
last_candidate = current_candidate;
|
|
ncandidates = 1;
|
|
}
|
|
else if (nmatch == nbestMatch)
|
|
{
|
|
last_candidate->next = current_candidate;
|
|
last_candidate = current_candidate;
|
|
ncandidates++;
|
|
}
|
|
else
|
|
last_candidate->next = NULL;
|
|
}
|
|
|
|
if (ncandidates == 1)
|
|
return candidates->args;
|
|
|
|
/*
|
|
* Still too many candidates?
|
|
* Try assigning types for the unknown columns.
|
|
*/
|
|
for (i = 0; i < nargs; i++)
|
|
{
|
|
if (input_typeids[i] == UNKNOWNOID)
|
|
{
|
|
slot_category = INVALID_TYPE;
|
|
slot_type = InvalidOid;
|
|
for (current_candidate = candidates;
|
|
current_candidate != NULL;
|
|
current_candidate = current_candidate->next)
|
|
{
|
|
current_typeids = current_candidate->args;
|
|
current_type = current_typeids[i];
|
|
current_category = TypeCategory(current_typeids[i]);
|
|
|
|
if (slot_category == InvalidOid)
|
|
{
|
|
slot_category = current_category;
|
|
slot_type = current_type;
|
|
}
|
|
else if ((current_category != slot_category)
|
|
&& IS_BUILTIN_TYPE(current_type))
|
|
return NULL;
|
|
else if (current_type != slot_type)
|
|
{
|
|
if (IsPreferredType(slot_category, current_type))
|
|
{
|
|
slot_type = current_type;
|
|
candidates = current_candidate;
|
|
}
|
|
else if (IsPreferredType(slot_category, slot_type))
|
|
candidates->next = current_candidate->next;
|
|
}
|
|
}
|
|
|
|
if (slot_type != InvalidOid)
|
|
input_typeids[i] = slot_type;
|
|
}
|
|
else
|
|
{
|
|
}
|
|
}
|
|
|
|
ncandidates = 0;
|
|
for (current_candidate = candidates;
|
|
current_candidate != NULL;
|
|
current_candidate = current_candidate->next)
|
|
ncandidates++;
|
|
|
|
if (ncandidates == 1)
|
|
return candidates->args;
|
|
|
|
return NULL;
|
|
} /* func_select_candidate() */
|
|
|
|
|
|
/* func_get_detail()
|
|
* Find the named function in the system catalogs.
|
|
*
|
|
* Attempt to find the named function in the system catalogs with
|
|
* arguments exactly as specified, so that the normal case
|
|
* (exact match) is as quick as possible.
|
|
*
|
|
* If an exact match isn't found:
|
|
* 1) get a vector of all possible input arg type arrays constructed
|
|
* from the superclasses of the original input arg types
|
|
* 2) get a list of all possible argument type arrays to the function
|
|
* with given name and number of arguments
|
|
* 3) for each input arg type array from vector #1:
|
|
* a) find how many of the function arg type arrays from list #2
|
|
* it can be coerced to
|
|
* b) if the answer is one, we have our function
|
|
* c) if the answer is more than one, attempt to resolve the conflict
|
|
* d) if the answer is zero, try the next array from vector #1
|
|
*/
|
|
static bool
|
|
func_get_detail(char *funcname,
|
|
int nargs,
|
|
Oid *oid_array,
|
|
Oid *funcid, /* return value */
|
|
Oid *rettype, /* return value */
|
|
bool *retset, /* return value */
|
|
Oid **true_typeids) /* return value */
|
|
{
|
|
Oid **input_typeid_vector;
|
|
Oid *current_input_typeids;
|
|
CandidateList function_typeids;
|
|
CandidateList current_function_typeids;
|
|
HeapTuple ftup;
|
|
Form_pg_proc pform;
|
|
|
|
/* attempt to find with arguments exactly as specified... */
|
|
ftup = SearchSysCacheTuple(PROCNAME,
|
|
PointerGetDatum(funcname),
|
|
Int32GetDatum(nargs),
|
|
PointerGetDatum(oid_array),
|
|
0);
|
|
*true_typeids = oid_array;
|
|
|
|
/* didn't find an exact match, so now try to match up candidates... */
|
|
if (!HeapTupleIsValid(ftup))
|
|
{
|
|
function_typeids = func_get_candidates(funcname, nargs);
|
|
|
|
/* found something, so let's look through them... */
|
|
if (function_typeids != NULL)
|
|
{
|
|
int ncandidates;
|
|
|
|
input_typeid_vector = argtype_inherit(nargs, oid_array);
|
|
current_input_typeids = oid_array;
|
|
|
|
do
|
|
{
|
|
ncandidates = match_argtypes(nargs, current_input_typeids,
|
|
function_typeids,
|
|
¤t_function_typeids);
|
|
|
|
/* one match only? then run with it... */
|
|
if (ncandidates == 1)
|
|
{
|
|
*true_typeids = current_function_typeids->args;
|
|
ftup = SearchSysCacheTuple(PROCNAME,
|
|
PointerGetDatum(funcname),
|
|
Int32GetDatum(nargs),
|
|
PointerGetDatum(*true_typeids),
|
|
0);
|
|
Assert(HeapTupleIsValid(ftup));
|
|
}
|
|
|
|
/*
|
|
* multiple candidates? then better decide or throw an
|
|
* error...
|
|
*/
|
|
else if (ncandidates > 1)
|
|
{
|
|
*true_typeids = func_select_candidate(nargs,
|
|
current_input_typeids,
|
|
current_function_typeids);
|
|
|
|
/* couldn't decide, so quit */
|
|
if (*true_typeids == NULL)
|
|
{
|
|
func_error(NULL, funcname, nargs, oid_array,
|
|
"Unable to identify a function which satisfies the given argument types"
|
|
"\n\tYou will have to retype your query using explicit typecasts");
|
|
}
|
|
|
|
/* found something, so use the first one... */
|
|
else
|
|
{
|
|
ftup = SearchSysCacheTuple(PROCNAME,
|
|
PointerGetDatum(funcname),
|
|
Int32GetDatum(nargs),
|
|
PointerGetDatum(*true_typeids),
|
|
0);
|
|
Assert(HeapTupleIsValid(ftup));
|
|
}
|
|
}
|
|
current_input_typeids = *input_typeid_vector++;
|
|
}
|
|
while (current_input_typeids != InvalidOid && ncandidates == 0);
|
|
}
|
|
}
|
|
|
|
if (!HeapTupleIsValid(ftup))
|
|
{
|
|
Type tp;
|
|
|
|
if (nargs == 1)
|
|
{
|
|
tp = typeidType(oid_array[0]);
|
|
if (typeTypeFlag(tp) == 'c')
|
|
elog(ERROR, "No such attribute or function '%s'", funcname);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pform = (Form_pg_proc) GETSTRUCT(ftup);
|
|
*funcid = ftup->t_data->t_oid;
|
|
*rettype = pform->prorettype;
|
|
*retset = pform->proretset;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* shouldn't reach here */
|
|
return false;
|
|
} /* func_get_detail() */
|
|
|
|
/*
|
|
* argtype_inherit() -- Construct an argtype vector reflecting the
|
|
* inheritance properties of the supplied argv.
|
|
*
|
|
* This function is used to disambiguate among functions with the
|
|
* same name but different signatures. It takes an array of eight
|
|
* type ids. For each type id in the array that's a complex type
|
|
* (a class), it walks up the inheritance tree, finding all
|
|
* superclasses of that type. A vector of new Oid type arrays
|
|
* is returned to the caller, reflecting the structure of the
|
|
* inheritance tree above the supplied arguments.
|
|
*
|
|
* The order of this vector is as follows: all superclasses of the
|
|
* rightmost complex class are explored first. The exploration
|
|
* continues from right to left. This policy means that we favor
|
|
* keeping the leftmost argument type as low in the inheritance tree
|
|
* as possible. This is intentional; it is exactly what we need to
|
|
* do for method dispatch. The last type array we return is all
|
|
* zeroes. This will match any functions for which return types are
|
|
* not defined. There are lots of these (mostly builtins) in the
|
|
* catalogs.
|
|
*/
|
|
static Oid **
|
|
argtype_inherit(int nargs, Oid *oid_array)
|
|
{
|
|
Oid relid;
|
|
int i;
|
|
InhPaths arginh[MAXFARGS];
|
|
|
|
for (i = 0; i < MAXFARGS; i++)
|
|
{
|
|
if (i < nargs)
|
|
{
|
|
arginh[i].self = oid_array[i];
|
|
if ((relid = typeidTypeRelid(oid_array[i])) != InvalidOid)
|
|
arginh[i].nsupers = find_inheritors(relid, &(arginh[i].supervec));
|
|
else
|
|
{
|
|
arginh[i].nsupers = 0;
|
|
arginh[i].supervec = (Oid *) NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
arginh[i].self = InvalidOid;
|
|
arginh[i].nsupers = 0;
|
|
arginh[i].supervec = (Oid *) NULL;
|
|
}
|
|
}
|
|
|
|
/* return an ordered cross-product of the classes involved */
|
|
return gen_cross_product(arginh, nargs);
|
|
}
|
|
|
|
static int
|
|
find_inheritors(Oid relid, Oid **supervec)
|
|
{
|
|
Relation inhrel;
|
|
HeapScanDesc inhscan;
|
|
ScanKeyData skey;
|
|
HeapTuple inhtup;
|
|
Oid *relidvec;
|
|
int nvisited;
|
|
List *visited,
|
|
*queue;
|
|
List *elt;
|
|
bool newrelid;
|
|
|
|
nvisited = 0;
|
|
queue = NIL;
|
|
visited = NIL;
|
|
|
|
inhrel = heap_openr(InheritsRelationName, AccessShareLock);
|
|
|
|
/*
|
|
* Use queue to do a breadth-first traversal of the inheritance graph
|
|
* from the relid supplied up to the root. At the top of the loop,
|
|
* relid is the OID of the reltype to check next, queue is the list
|
|
* of pending rels to check after this one, and visited is the list
|
|
* of relids we need to output.
|
|
*/
|
|
do
|
|
{
|
|
/* find all types this relid inherits from, and add them to queue */
|
|
|
|
ScanKeyEntryInitialize(&skey, 0x0, Anum_pg_inherits_inhrelid,
|
|
F_OIDEQ,
|
|
ObjectIdGetDatum(relid));
|
|
|
|
inhscan = heap_beginscan(inhrel, 0, SnapshotNow, 1, &skey);
|
|
|
|
while (HeapTupleIsValid(inhtup = heap_getnext(inhscan, 0)))
|
|
{
|
|
Form_pg_inherits inh = (Form_pg_inherits) GETSTRUCT(inhtup);
|
|
|
|
queue = lappendi(queue, inh->inhparent);
|
|
}
|
|
|
|
heap_endscan(inhscan);
|
|
|
|
/* pull next unvisited relid off the queue */
|
|
|
|
newrelid = false;
|
|
while (queue != NIL)
|
|
{
|
|
relid = lfirsti(queue);
|
|
queue = lnext(queue);
|
|
if (! intMember(relid, visited))
|
|
{
|
|
newrelid = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (newrelid)
|
|
{
|
|
visited = lappendi(visited, relid);
|
|
nvisited++;
|
|
}
|
|
} while (newrelid);
|
|
|
|
heap_close(inhrel, AccessShareLock);
|
|
|
|
if (nvisited > 0)
|
|
{
|
|
relidvec = (Oid *) palloc(nvisited * sizeof(Oid));
|
|
*supervec = relidvec;
|
|
|
|
foreach(elt, visited)
|
|
{
|
|
/* return the type id, rather than the relation id */
|
|
Relation rd;
|
|
Oid trelid;
|
|
|
|
relid = lfirsti(elt);
|
|
rd = heap_open(relid, NoLock);
|
|
if (! RelationIsValid(rd))
|
|
elog(ERROR, "Relid %u does not exist", relid);
|
|
trelid = typeTypeId(typenameType(RelationGetRelationName(rd)));
|
|
heap_close(rd, NoLock);
|
|
*relidvec++ = trelid;
|
|
}
|
|
}
|
|
else
|
|
*supervec = (Oid *) NULL;
|
|
|
|
freeList(visited);
|
|
/* there doesn't seem to be any equally easy way to release the queue
|
|
* list cells, but since they're palloc'd space it's not critical.
|
|
*/
|
|
|
|
return nvisited;
|
|
}
|
|
|
|
static Oid **
|
|
gen_cross_product(InhPaths *arginh, int nargs)
|
|
{
|
|
int nanswers;
|
|
Oid **result,
|
|
**iter;
|
|
Oid *oneres;
|
|
int i,
|
|
j;
|
|
int cur[MAXFARGS];
|
|
|
|
nanswers = 1;
|
|
for (i = 0; i < nargs; i++)
|
|
{
|
|
nanswers *= (arginh[i].nsupers + 2);
|
|
cur[i] = 0;
|
|
}
|
|
|
|
iter = result = (Oid **) palloc(sizeof(Oid *) * nanswers);
|
|
|
|
/* compute the cross product from right to left */
|
|
for (;;)
|
|
{
|
|
oneres = (Oid *) palloc(MAXFARGS * sizeof(Oid));
|
|
MemSet(oneres, 0, MAXFARGS * sizeof(Oid));
|
|
|
|
for (i = nargs - 1; i >= 0 && cur[i] > arginh[i].nsupers; i--)
|
|
continue;
|
|
|
|
/* if we're done, terminate with NULL pointer */
|
|
if (i < 0)
|
|
{
|
|
*iter = NULL;
|
|
return result;
|
|
}
|
|
|
|
/* no, increment this column and zero the ones after it */
|
|
cur[i] = cur[i] + 1;
|
|
for (j = nargs - 1; j > i; j--)
|
|
cur[j] = 0;
|
|
|
|
for (i = 0; i < nargs; i++)
|
|
{
|
|
if (cur[i] == 0)
|
|
oneres[i] = arginh[i].self;
|
|
else if (cur[i] > arginh[i].nsupers)
|
|
oneres[i] = 0; /* wild card */
|
|
else
|
|
oneres[i] = arginh[i].supervec[cur[i] - 1];
|
|
}
|
|
|
|
*iter++ = oneres;
|
|
}
|
|
}
|
|
|
|
|
|
/* make_arguments()
|
|
* Given the number and types of arguments to a function, and the
|
|
* actual arguments and argument types, do the necessary typecasting.
|
|
*
|
|
* There are two ways an input typeid can differ from a function typeid:
|
|
* 1) the input type inherits the function type, so no typecasting required
|
|
* 2) the input type can be typecast into the function type
|
|
* Right now, we only typecast unknowns, and that is all we check for.
|
|
*
|
|
* func_get_detail() now can find coersions for function arguments which
|
|
* will make this function executable. So, we need to recover these
|
|
* results here too.
|
|
* - thomas 1998-03-25
|
|
*/
|
|
static void
|
|
make_arguments(ParseState *pstate,
|
|
int nargs,
|
|
List *fargs,
|
|
Oid *input_typeids,
|
|
Oid *function_typeids)
|
|
{
|
|
List *current_fargs;
|
|
int i;
|
|
|
|
for (i = 0, current_fargs = fargs;
|
|
i < nargs;
|
|
i++, current_fargs = lnext(current_fargs))
|
|
{
|
|
/* types don't match? then force coersion using a function call... */
|
|
if (input_typeids[i] != function_typeids[i])
|
|
{
|
|
lfirst(current_fargs) = coerce_type(pstate,
|
|
lfirst(current_fargs),
|
|
input_typeids[i],
|
|
function_typeids[i], -1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
** setup_tlist
|
|
** Build a tlist that says which attribute to project to.
|
|
** This routine is called by ParseFuncOrColumn() to set up a target list
|
|
** on a tuple parameter or return value. Due to a bug in 4.0,
|
|
** it's not possible to refer to system attributes in this case.
|
|
*/
|
|
static List *
|
|
setup_tlist(char *attname, Oid relid)
|
|
{
|
|
TargetEntry *tle;
|
|
Resdom *resnode;
|
|
Var *varnode;
|
|
Oid typeid;
|
|
int32 type_mod;
|
|
int attno;
|
|
|
|
attno = get_attnum(relid, attname);
|
|
if (attno < 0)
|
|
elog(ERROR, "Cannot reference attribute '%s'"
|
|
" of tuple params/return values for functions", attname);
|
|
|
|
typeid = get_atttype(relid, attno);
|
|
type_mod = get_atttypmod(relid, attno);
|
|
|
|
resnode = makeResdom(1,
|
|
typeid,
|
|
type_mod,
|
|
get_attname(relid, attno),
|
|
0,
|
|
InvalidOid,
|
|
false);
|
|
varnode = makeVar(-1, attno, typeid, type_mod, 0);
|
|
|
|
tle = makeTargetEntry(resnode, (Node *) varnode);
|
|
return lcons(tle, NIL);
|
|
}
|
|
|
|
/*
|
|
** setup_base_tlist
|
|
** Build a tlist that extracts a base type from the tuple
|
|
** returned by the executor.
|
|
*/
|
|
List *
|
|
setup_base_tlist(Oid typeid)
|
|
{
|
|
TargetEntry *tle;
|
|
Resdom *resnode;
|
|
Var *varnode;
|
|
|
|
resnode = makeResdom(1,
|
|
typeid,
|
|
-1,
|
|
"<noname>",
|
|
0,
|
|
InvalidOid,
|
|
false);
|
|
varnode = makeVar(-1, 1, typeid, -1, 0);
|
|
tle = makeTargetEntry(resnode, (Node *) varnode);
|
|
|
|
return lcons(tle, NIL);
|
|
}
|
|
|
|
/*
|
|
* ParseComplexProjection -
|
|
* handles function calls with a single argument that is of complex type.
|
|
* This routine returns NULL if it can't handle the projection (eg. sets).
|
|
*/
|
|
static Node *
|
|
ParseComplexProjection(ParseState *pstate,
|
|
char *funcname,
|
|
Node *first_arg,
|
|
bool *attisset)
|
|
{
|
|
Oid argtype;
|
|
Oid argrelid;
|
|
Relation rd;
|
|
Oid relid;
|
|
int attnum;
|
|
|
|
switch (nodeTag(first_arg))
|
|
{
|
|
case T_Iter:
|
|
{
|
|
Func *func;
|
|
Iter *iter;
|
|
|
|
iter = (Iter *) first_arg;
|
|
func = (Func *) ((Expr *) iter->iterexpr)->oper;
|
|
argtype = get_func_rettype(func->funcid);
|
|
argrelid = typeidTypeRelid(argtype);
|
|
if (argrelid &&
|
|
((attnum = get_attnum(argrelid, funcname))
|
|
!= InvalidAttrNumber))
|
|
{
|
|
|
|
/*
|
|
* the argument is a function returning a tuple, so
|
|
* funcname may be a projection
|
|
*/
|
|
|
|
/* add a tlist to the func node and return the Iter */
|
|
rd = heap_openr(typeidTypeName(argtype), NoLock);
|
|
if (RelationIsValid(rd))
|
|
{
|
|
relid = RelationGetRelid(rd);
|
|
func->func_tlist = setup_tlist(funcname, argrelid);
|
|
iter->itertype = attnumTypeId(rd, attnum);
|
|
heap_close(rd, NoLock);
|
|
return (Node *) iter;
|
|
}
|
|
else
|
|
{
|
|
elog(ERROR, "Function '%s' has bad return type %d",
|
|
funcname, argtype);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* drop through */
|
|
;
|
|
}
|
|
break;
|
|
}
|
|
case T_Var:
|
|
{
|
|
|
|
/*
|
|
* The argument is a set, so this is either a projection
|
|
* or a function call on this set.
|
|
*/
|
|
*attisset = true;
|
|
break;
|
|
}
|
|
case T_Expr:
|
|
{
|
|
Expr *expr = (Expr *) first_arg;
|
|
Func *funcnode;
|
|
|
|
if (expr->opType != FUNC_EXPR)
|
|
break;
|
|
|
|
funcnode = (Func *) expr->oper;
|
|
argtype = get_func_rettype(funcnode->funcid);
|
|
argrelid = typeidTypeRelid(argtype);
|
|
|
|
/*
|
|
* the argument is a function returning a tuple, so
|
|
* funcname may be a projection
|
|
*/
|
|
if (argrelid &&
|
|
(attnum = get_attnum(argrelid, funcname))
|
|
!= InvalidAttrNumber)
|
|
{
|
|
|
|
/* add a tlist to the func node */
|
|
rd = heap_openr(typeidTypeName(argtype), NoLock);
|
|
if (RelationIsValid(rd))
|
|
{
|
|
Expr *newexpr;
|
|
|
|
relid = RelationGetRelid(rd);
|
|
funcnode->func_tlist = setup_tlist(funcname, argrelid);
|
|
funcnode->functype = attnumTypeId(rd, attnum);
|
|
|
|
newexpr = makeNode(Expr);
|
|
newexpr->typeOid = funcnode->functype;
|
|
newexpr->opType = FUNC_EXPR;
|
|
newexpr->oper = (Node *) funcnode;
|
|
newexpr->args = expr->args;
|
|
|
|
heap_close(rd, NoLock);
|
|
|
|
return (Node *) newexpr;
|
|
}
|
|
/* XXX why not an error condition if it's not there? */
|
|
|
|
}
|
|
|
|
break;
|
|
}
|
|
case T_Param:
|
|
{
|
|
Param *param = (Param *) first_arg;
|
|
|
|
/*
|
|
* If the Param is a complex type, this could be a
|
|
* projection
|
|
*/
|
|
rd = heap_openr(typeidTypeName(param->paramtype), NoLock);
|
|
if (RelationIsValid(rd))
|
|
{
|
|
relid = RelationGetRelid(rd);
|
|
if ((attnum = get_attnum(relid, funcname))
|
|
!= InvalidAttrNumber)
|
|
{
|
|
param->paramtype = attnumTypeId(rd, attnum);
|
|
param->param_tlist = setup_tlist(funcname, relid);
|
|
heap_close(rd, NoLock);
|
|
return (Node *) param;
|
|
}
|
|
heap_close(rd, NoLock);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Error message when function lookup fails that gives details of the
|
|
* argument types
|
|
*/
|
|
void
|
|
func_error(char *caller, char *funcname, int nargs, Oid *argtypes, char *msg)
|
|
{
|
|
char p[(NAMEDATALEN + 2) * MAXFMGRARGS],
|
|
*ptr;
|
|
int i;
|
|
|
|
ptr = p;
|
|
*ptr = '\0';
|
|
for (i = 0; i < nargs; i++)
|
|
{
|
|
if (i)
|
|
{
|
|
*ptr++ = ',';
|
|
*ptr++ = ' ';
|
|
}
|
|
if (argtypes[i] != 0)
|
|
{
|
|
strcpy(ptr, typeidTypeName(argtypes[i]));
|
|
*(ptr + NAMEDATALEN) = '\0';
|
|
}
|
|
else
|
|
strcpy(ptr, "opaque");
|
|
ptr += strlen(ptr);
|
|
}
|
|
|
|
if (caller == NULL)
|
|
{
|
|
elog(ERROR, "Function '%s(%s)' does not exist%s%s",
|
|
funcname, p, ((msg != NULL) ? "\n\t" : ""), ((msg != NULL) ? msg : ""));
|
|
}
|
|
else
|
|
{
|
|
elog(ERROR, "%s: function '%s(%s)' does not exist%s%s",
|
|
caller, funcname, p, ((msg != NULL) ? "\n\t" : ""), ((msg != NULL) ? msg : ""));
|
|
}
|
|
}
|