Fix for count(*), aggs with views and multiple tables and sum(3).

This commit is contained in:
Bruce Momjian 1998-01-04 04:31:43 +00:00
parent c629d3b9d6
commit 4b05912f0b
15 changed files with 215 additions and 97 deletions

View File

@ -278,7 +278,7 @@ ExecAgg(Agg *node)
for (i = 0; i < nagg; i++)
{
AttrNumber attnum;
int2 attlen;
int2 attlen = 0;
Datum newVal = (Datum) NULL;
AggFuncInfo *aggfns = &aggFuncInfo[i];
Datum args[2];
@ -298,18 +298,24 @@ ExecAgg(Agg *node)
newVal = ExecEvalExpr(aggregates[i]->target, econtext,
&isNull, &isDone);
break;
case T_Const:
tagnode = NULL;
econtext->ecxt_scantuple = outerslot;
newVal = ExecEvalExpr(aggregates[i]->target, econtext,
&isNull, &isDone);
break;
default:
elog(WARN, "ExecAgg: Bad Agg->Target for Agg %d", i);
}
if (isNull)
if (isNull && !aggregates[i]->usenulls)
continue; /* ignore this tuple for this agg */
if (aggfns->xfn1)
{
if (noInitValue[i])
{
int byVal;
int byVal = 0;
/*
* value1 and value2 has not been initialized. This is
@ -322,22 +328,34 @@ ExecAgg(Agg *node)
* a copy of it since the tuple from which it came
* will be freed on the next iteration of the scan
*/
if (tagnode != NULL)
switch (nodeTag(aggregates[i]->target))
{
FunctionCachePtr fcache_ptr;
case T_Var:
attnum = ((Var *) aggregates[i]->target)->varattno;
attlen = outerslot->ttc_tupleDescriptor->attrs[attnum - 1]->attlen;
byVal = outerslot->ttc_tupleDescriptor->attrs[attnum - 1]->attbyval;
if (nodeTag(tagnode) == T_Func)
fcache_ptr = ((Func *) tagnode)->func_fcache;
else
fcache_ptr = ((Oper *) tagnode)->op_fcache;
attlen = fcache_ptr->typlen;
byVal = fcache_ptr->typbyval;
}
else
{
attnum = ((Var *) aggregates[i]->target)->varattno;
attlen = outerslot->ttc_tupleDescriptor->attrs[attnum - 1]->attlen;
byVal = outerslot->ttc_tupleDescriptor->attrs[attnum - 1]->attbyval;
break;
case T_Expr:
{
FunctionCachePtr fcache_ptr;
if (nodeTag(tagnode) == T_Func)
fcache_ptr = ((Func *) tagnode)->func_fcache;
else
fcache_ptr = ((Oper *) tagnode)->op_fcache;
attlen = fcache_ptr->typlen;
byVal = fcache_ptr->typbyval;
break;
}
case T_Const:
attlen = ((Const *) aggregates[i]->target)->constlen;
byVal = ((Const *) aggregates[i]->target)->constbyval;
break;
default:
elog(WARN, "ExecAgg: Bad Agg->Target for Agg %d", i);
}
if (attlen == -1)
{
@ -349,7 +367,6 @@ ExecAgg(Agg *node)
value1[i] = newVal;
else
memmove((char *) (value1[i]), (char *) newVal, attlen);
/* value1[i] = newVal; */
noInitValue[i] = 0;
nulls[i] = 0;
}

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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.26 1997/12/24 06:05:52 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.27 1998/01/04 04:31:02 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -899,6 +899,7 @@ _copyAggreg(Aggreg *from)
newnode->aggname = pstrdup(from->aggname);
newnode->basetype = from->basetype;
newnode->aggtype = from->aggtype;
newnode->usenulls = from->usenulls;
Node_Copy(from, newnode, target);

View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.82 1998/01/01 05:44:53 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.83 1998/01/04 04:31:08 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -2381,8 +2381,6 @@ OptUseOp: USING Op { $$ = $2; }
*
* ...however, recursive addattr and rename supported. make special
* cases for these.
*
* XXX i believe '*' should be the default behavior, but...
*/
opt_inh_star: '*' { $$ = TRUE; }
| /*EMPTY*/ { $$ = FALSE; }
@ -2978,11 +2976,12 @@ a_expr: attr opt_indirection
}
| name '(' '*' ')'
{
FuncCall *n = makeNode(FuncCall);
Ident *star = makeNode(Ident);
/* cheap hack for aggregate (eg. count) */
star->name = "oid";
FuncCall *n = makeNode(FuncCall);
A_Const *star = makeNode(A_Const);
star->val.type = T_String;
star->val.val.str = "";
n->funcname = $1;
n->args = lcons(star, NIL);
$$ = (Node *)n;

View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_agg.c,v 1.4 1997/12/22 05:42:19 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_agg.c,v 1.5 1998/01/04 04:31:14 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,14 +18,17 @@
#include "postgres.h"
#include "access/heapam.h"
#include "catalog/pg_aggregate.h"
#include "catalog/pg_type.h"
#include "nodes/nodeFuncs.h"
#include "nodes/primnodes.h"
#include "nodes/relation.h"
#include "optimizer/clauses.h"
#include "parser/parse_agg.h"
#include "parser/parse_expr.h"
#include "parser/parse_node.h"
#include "parser/parse_target.h"
#include "utils/syscache.h"
#include "utils/lsyscache.h"
static bool contain_agg_clause(Node *clause);
static bool exprIsAggOrGroupCol(Node *expr, List *groupClause);
@ -276,7 +279,8 @@ parseCheckAggregates(ParseState *pstate, Query *qry)
Aggreg *
ParseAgg(char *aggname, Oid basetype, Node *target)
ParseAgg(ParseState *pstate, char *aggname, Oid basetype,
List *target, int precedence)
{
Oid fintype;
Oid vartype;
@ -284,7 +288,8 @@ ParseAgg(char *aggname, Oid basetype, Node *target)
Form_pg_aggregate aggform;
Aggreg *aggreg;
HeapTuple theAggTuple;
bool usenulls = false;
theAggTuple = SearchSysCacheTuple(AGGNAME, PointerGetDatum(aggname),
ObjectIdGetDatum(basetype),
0, 0);
@ -293,21 +298,78 @@ ParseAgg(char *aggname, Oid basetype, Node *target)
elog(WARN, "aggregate %s does not exist", aggname);
}
/*
* We do a major hack for count(*) here.
*
* Count(*) poses several problems. First, we need a field that is
* guaranteed to be in the range table, and unique. Using a constant
* causes the optimizer to properly remove the aggragate from any
* elements of the query.
* Using just 'oid', which can not be null, in the parser fails on:
*
* select count(*) from tab1, tab2 -- oid is not unique
* select count(*) from viewtable -- views don't have real oids
*
* So, for an aggregate with parameter '*', we use the first valid
* range table entry, and pick the first column from the table.
* We set a flag to count nulls, because we could have nulls in
* that column.
*/
if (nodeTag(lfirst(target)) == T_Const)
{
Const *con = (Const *)lfirst(target);
if (con->consttype == UNKNOWNOID && VARSIZE(con->constvalue) == VARHDRSZ)
{
Attr *attr = makeNode(Attr);
List *rtable, *rlist;
RangeTblEntry *first_valid_rte;
Assert(lnext(target) == NULL);
if (pstate->p_is_rule)
rtable = lnext(lnext(pstate->p_rtable));
else
rtable = pstate->p_rtable;
first_valid_rte = NULL;
foreach(rlist, rtable)
{
RangeTblEntry *rte = lfirst(rlist);
/* only entries on outer(non-function?) scope */
if (!rte->inFromCl && rte != pstate->p_target_rangetblentry)
continue;
first_valid_rte =rte;
break;
}
if (first_valid_rte == NULL)
elog(WARN, "Can't find column to do aggregate(*) on.");
attr->relname = first_valid_rte->refname;
attr->attrs = lcons(makeString(
get_attname(first_valid_rte->relid,1)),NIL);
lfirst(target) = transformExpr(pstate, (Node *) attr, precedence);
usenulls = true;
}
}
aggform = (Form_pg_aggregate) GETSTRUCT(theAggTuple);
fintype = aggform->aggfinaltype;
xfn1 = aggform->aggtransfn1;
if (nodeTag(target) != T_Var && nodeTag(target) != T_Expr)
elog(WARN, "parser: aggregate can only be applied on an attribute or expression");
/* only aggregates with transfn1 need a base type */
if (OidIsValid(xfn1))
{
basetype = aggform->aggbasetype;
if (nodeTag(target) == T_Var)
vartype = ((Var *) target)->vartype;
if (nodeTag(lfirst(target)) == T_Var)
vartype = ((Var *) lfirst(target))->vartype;
else
vartype = ((Expr *) target)->typeOid;
vartype = ((Expr *) lfirst(target))->typeOid;
if (basetype != vartype)
{
@ -327,7 +389,9 @@ ParseAgg(char *aggname, Oid basetype, Node *target)
aggreg->basetype = aggform->aggbasetype;
aggreg->aggtype = fintype;
aggreg->target = target;
aggreg->target = lfirst(target);
if (usenulls)
aggreg->usenulls = true;
return aggreg;
}

View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.3 1997/11/26 03:42:42 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_func.c,v 1.4 1998/01/04 04:31:18 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -87,7 +87,8 @@ typedef struct _SuperQE
*/
Node *
ParseFunc(ParseState *pstate, char *funcname, List *fargs, int *curr_resno)
ParseFunc(ParseState *pstate, char *funcname, List *fargs,
int *curr_resno, int precedence)
{
Oid rettype = (Oid) 0;
Oid argrelid = (Oid) 0;
@ -194,9 +195,7 @@ ParseFunc(ParseState *pstate, char *funcname, List *fargs, int *curr_resno)
*/
if ((get_attnum(argrelid, funcname) == InvalidAttrNumber)
&& strcmp(funcname, "*"))
{
elog(WARN, "Functions on sets are not yet supported");
}
}
if (retval)
@ -223,7 +222,8 @@ ParseFunc(ParseState *pstate, char *funcname, List *fargs, int *curr_resno)
ObjectIdGetDatum(basetype),
0, 0))
{
Aggreg *aggreg = ParseAgg(funcname, basetype, lfirst(fargs));
Aggreg *aggreg = ParseAgg(pstate, funcname, basetype,
fargs, precedence);
AddAggToParseState(pstate, aggreg);
return (Node *) aggreg;
@ -368,7 +368,7 @@ ParseFunc(ParseState *pstate, char *funcname, List *fargs, int *curr_resno)
else
{
funcnode->func_tlist = setup_tlist(funcname, argrelid);
rettype = attnameTypeId(argrelid, funcname);
rettype = get_atttype(argrelid, get_attnum(argrelid, funcname));
}
}
@ -1031,7 +1031,7 @@ setup_tlist(char *attname, Oid relid)
if (attno < 0)
elog(WARN, "cannot reference attribute '%s' of tuple params/return values for functions", attname);
typeid = attnameTypeId(relid, attname);
typeid = get_atttype(relid, attno);
resnode = makeResdom(1,
typeid,
typeLen(typeidType(typeid)),

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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_relation.c,v 1.3 1997/11/26 03:42:48 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_relation.c,v 1.4 1998/01/04 04:31:19 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -346,34 +346,6 @@ attnumAttNelems(Relation rd, int attid)
return (rd->rd_att->attrs[attid - 1]->attnelems);
}
Oid
attnameTypeId(Oid relid, char *attrname)
{
int attid;
Oid vartype;
Relation rd;
rd = heap_open(relid);
if (!RelationIsValid(rd))
{
rd = heap_openr(typeidTypeName(relid));
if (!RelationIsValid(rd))
elog(WARN, "cannot compute type of att %s for relid %d",
attrname, relid);
}
attid = attnameAttNum(rd, attrname); /* could elog(WARN) and never return */
vartype = attnumTypeId(rd, attid);
/*
* close relation we're done with it now
*/
heap_close(rd);
return (vartype);
}
/* given attribute id, return type of that attribute */
/* XXX Special case for pseudo-attributes is a hack */
Oid

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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.3 1997/11/26 03:42:49 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.4 1998/01/04 04:31:22 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -255,7 +255,7 @@ transformTargetList(ParseState *pstate, List *targetlist)
* Target item is fully specified: ie.
* relation.attribute
*/
result = handleNestedDots(pstate, att, &pstate->p_last_resno);
result = handleNestedDots(pstate, att, &pstate->p_last_resno,EXPR_COLUMN_FIRST);
handleTargetColname(pstate, &res->name, att->relname, attrname);
if (att->indirection != NIL)
{
@ -467,7 +467,8 @@ make_targetlist_expr(ParseState *pstate,
att->relname = pstrdup(RelationGetRelationName(rd)->data);
att->attrs = lcons(makeString(colname), NIL);
target_expr = (Expr *) handleNestedDots(pstate, att,
&pstate->p_last_resno);
&pstate->p_last_resno,
EXPR_COLUMN_FIRST);
while (ar != NIL)
{
A_Indices *ind = lfirst(ar);

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@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/Attic/locks.c,v 1.5 1997/09/08 21:46:33 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/Attic/locks.c,v 1.6 1998/01/04 04:31:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -58,6 +58,14 @@ nodeThisLockWasTriggered(Node *node, int varno, AttrNumber attnum)
nodeThisLockWasTriggered(tle->expr, varno, attnum);
}
break;
case T_Aggreg:
{
Aggreg *agg = (Aggreg *) node;
return
nodeThisLockWasTriggered(agg->target, varno, attnum);
}
break;
case T_List:
{
List *l;
@ -87,10 +95,20 @@ thisLockWasTriggered(int varno,
AttrNumber attnum,
Query *parsetree)
{
return
(nodeThisLockWasTriggered(parsetree->qual, varno, attnum) ||
nodeThisLockWasTriggered((Node *) parsetree->targetList,
varno, attnum));
int i;
if (nodeThisLockWasTriggered(parsetree->qual, varno, attnum))
return true;
if (nodeThisLockWasTriggered((Node *) parsetree->targetList, varno, attnum))
return true;
for(i=0; i < parsetree->qry_numAgg; i++)
if (nodeThisLockWasTriggered(parsetree->qry_aggs[i]->target,
varno, attnum))
return true;
return false;
}
/*

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@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.6 1997/09/08 21:46:38 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.7 1998/01/04 04:31:28 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -225,6 +225,7 @@ FireRetrieveRulesAtQuery(Query *parsetree,
{
*instead_flag = TRUE;
FixResdomTypes(parsetree->targetList);
return lcons(parsetree, NIL);
}
}

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@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.8 1997/09/18 20:21:11 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.9 1998/01/04 04:31:29 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -46,6 +46,13 @@ OffsetVarNodes(Node *node, int offset)
OffsetVarNodes(tle->expr, offset);
}
break;
case T_Aggreg:
{
Aggreg *agg = (Aggreg *) node;
OffsetVarNodes(agg->target, offset);
}
break;
case T_Expr:
{
Expr *expr = (Expr *) node;
@ -91,6 +98,13 @@ ChangeVarNodes(Node *node, int old_varno, int new_varno)
ChangeVarNodes(tle->expr, old_varno, new_varno);
}
break;
case T_Aggreg:
{
Aggreg *agg = (Aggreg *) node;
ChangeVarNodes(agg->target, old_varno, new_varno);
}
break;
case T_Expr:
{
Expr *expr = (Expr *) node;
@ -235,6 +249,9 @@ ResolveNew(RewriteInfo *info, List *targetlist, Node **nodePtr)
case T_TargetEntry:
ResolveNew(info, targetlist, &((TargetEntry *) node)->expr);
break;
case T_Aggreg:
ResolveNew(info, targetlist, &((Aggreg *) node)->target);
break;
case T_Expr:
ResolveNew(info, targetlist, (Node **) (&(((Expr *) node)->args)));
break;
@ -325,6 +342,14 @@ nodeHandleRIRAttributeRule(Node **nodePtr,
rt_index, attr_num, modified, badsql);
}
break;
case T_Aggreg:
{
Aggreg *agg = (Aggreg *) node;
nodeHandleRIRAttributeRule(&agg->target, rtable, targetlist,
rt_index, attr_num, modified, badsql);
}
break;
case T_Expr:
{
Expr *expr = (Expr *) node;
@ -395,11 +420,16 @@ HandleRIRAttributeRule(Query *parsetree,
int *modified,
int *badsql)
{
int i;
nodeHandleRIRAttributeRule((Node **) (&(parsetree->targetList)), rtable,
targetlist, rt_index, attr_num,
modified, badsql);
nodeHandleRIRAttributeRule(&parsetree->qual, rtable, targetlist,
rt_index, attr_num, modified, badsql);
for(i=0; i < parsetree->qry_numAgg; i++)
nodeHandleRIRAttributeRule(&parsetree->qry_aggs[i]->target, rtable,
targetlist, rt_index, attr_num, modified, badsql);
}
@ -437,6 +467,14 @@ nodeHandleViewRule(Node **nodePtr,
rt_index, modified);
}
break;
case T_Aggreg:
{
Aggreg *agg = (Aggreg *) node;
nodeHandleViewRule(&(agg->target), rtable, targetlist,
rt_index, modified);
}
break;
case T_Expr:
{
Expr *expr = (Expr *) node;
@ -483,8 +521,13 @@ HandleViewRule(Query *parsetree,
int rt_index,
int *modified)
{
int i;
nodeHandleViewRule(&parsetree->qual, rtable, targetlist, rt_index,
modified);
nodeHandleViewRule((Node **) (&(parsetree->targetList)), rtable, targetlist,
rt_index, modified);
for(i=0; i < parsetree->qry_numAgg; i++)
nodeHandleViewRule(&parsetree->qry_aggs[i]->target, rtable, targetlist, rt_index,
modified);
}

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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: primnodes.h,v 1.11 1997/09/08 21:52:58 momjian Exp $
* $Id: primnodes.h,v 1.12 1998/01/04 04:31:37 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -255,18 +255,19 @@ typedef struct Func
* aggname - name of the aggregate
* basetype - base type Oid of the aggregate
* aggtype - type Oid of final result of the aggregate
* query - XXX comment me
* target - XXX comment me
* target - attribute or expression we are aggregating on
* aggno - index to ecxt_values
* ----------------
*/
typedef struct Aggreg
{
NodeTag type;
char *aggname;
Oid basetype; /* base type of the aggregate */
Oid aggtype; /* type of final result */
Node *target; /* attribute to aggreg on */
int aggno; /* index to ecxt_values */
Oid basetype;
Oid aggtype;
Node *target;
int aggno;
bool usenulls;
} Aggreg;
/* ----------------

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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_agg.h,v 1.3 1997/11/26 03:43:08 momjian Exp $
* $Id: parse_agg.h,v 1.4 1998/01/04 04:31:39 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,7 +21,8 @@
extern void AddAggToParseState(ParseState *pstate, Aggreg *aggreg);
extern void finalizeAggregates(ParseState *pstate, Query *qry);
extern void parseCheckAggregates(ParseState *pstate, Query *qry);
extern Aggreg *ParseAgg(char *aggname, Oid basetype, Node *target);
extern Aggreg *ParseAgg(ParseState *pstate, char *aggname, Oid basetype,
List *target, int precedence);
extern void agg_error(char *caller, char *aggname, Oid basetypeID);
#endif /* PARSE_AGG_H */

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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_expr.h,v 1.3 1997/11/26 03:43:11 momjian Exp $
* $Id: parse_expr.h,v 1.4 1998/01/04 04:31:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,7 +21,8 @@
extern Node *transformExpr(ParseState *pstate, Node *expr, int precedence);
extern Node *transformIdent(ParseState *pstate, Node *expr, int precedence);
extern Oid exprType(Node *expr);
extern Node *handleNestedDots(ParseState *pstate, Attr *attr, int *curr_resno);
extern Node *handleNestedDots(ParseState *pstate, Attr *attr,
int *curr_resno, int precedence);
extern Node *parser_typecast2(Node *expr, Oid exprType, Type tp, int typlen);
#endif /* PARSE_EXPR_H */

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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_func.h,v 1.3 1997/11/26 03:43:12 momjian Exp $
* $Id: parse_func.h,v 1.4 1998/01/04 04:31:42 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -43,7 +43,7 @@ typedef struct _CandidateList
} *CandidateList;
extern Node *ParseFunc(ParseState *pstate, char *funcname, List *fargs,
int *curr_resno);
int *curr_resno, int precedence);
extern void func_error(char *caller, char *funcname, int nargs, Oid *argtypes);

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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_relation.h,v 1.3 1997/11/26 03:43:16 momjian Exp $
* $Id: parse_relation.h,v 1.4 1998/01/04 04:31:43 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,7 +34,6 @@ extern int attnameAttNum(Relation rd, char *a);
extern bool attnameIsSet(Relation rd, char *name);
extern char *attnumAttName(Relation rd, int attrno);
extern int attnumAttNelems(Relation rd, int attid);
extern Oid attnameTypeId(Oid relid, char *attrname);
extern Oid attnumTypeId(Relation rd, int attid);
extern void handleTargetColname(ParseState *pstate, char **resname,
char *refname, char *colname);