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Commit9332435

Browse files
committed
Pass incompletely-transformed aggregate argument lists as separate parameters
to transformAggregateCall, instead of abusing fields in Aggref to carry themtemporarily. No change in functionality but hopefully the code is a bitclearer now. Per gripe from Gokulakannan Somasundaram.
1 parentf248e11 commit9332435

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3 files changed

+15
-15
lines changed

3 files changed

+15
-15
lines changed

‎src/backend/parser/parse_agg.c

Lines changed: 10 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/parser/parse_agg.c,v 1.92 2010/02/26 02:00:49 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/parser/parse_agg.c,v 1.93 2010/03/17 16:52:38 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -44,10 +44,11 @@ static bool check_ungrouped_columns_walker(Node *node,
4444
* transformAggregateCall -
4545
*Finish initial transformation of an aggregate call
4646
*
47-
* parse_func.c has recognized the function as an aggregate, and has set
48-
* up all the fields of the Aggref except aggdistinct and agglevelsup.
49-
* However, the args list is just bare expressions, and the aggorder list
50-
* hasn't been transformed at all.
47+
* parse_func.c has recognized the function as an aggregate, and has set up
48+
* all the fields of the Aggref except args, aggorder, aggdistinct and
49+
* agglevelsup. The passed-in args list has been through standard expression
50+
* transformation, while the passed-in aggorder list hasn't been transformed
51+
* at all.
5152
*
5253
* Here we convert the args list into a targetlist by inserting TargetEntry
5354
* nodes, and then transform the aggorder and agg_distinct specifications to
@@ -59,7 +60,8 @@ static bool check_ungrouped_columns_walker(Node *node,
5960
* pstate level.
6061
*/
6162
void
62-
transformAggregateCall(ParseState*pstate,Aggref*agg,boolagg_distinct)
63+
transformAggregateCall(ParseState*pstate,Aggref*agg,
64+
List*args,List*aggorder,boolagg_distinct)
6365
{
6466
List*tlist;
6567
List*torder;
@@ -75,7 +77,7 @@ transformAggregateCall(ParseState *pstate, Aggref *agg, bool agg_distinct)
7577
*/
7678
tlist=NIL;
7779
attno=1;
78-
foreach(lc,agg->args)
80+
foreach(lc,args)
7981
{
8082
Expr*arg= (Expr*)lfirst(lc);
8183
TargetEntry*tle=makeTargetEntry(arg,attno++,NULL, false);
@@ -96,7 +98,7 @@ transformAggregateCall(ParseState *pstate, Aggref *agg, bool agg_distinct)
9698
pstate->p_next_resno=attno;
9799

98100
torder=transformSortClause(pstate,
99-
agg->aggorder,
101+
aggorder,
100102
&tlist,
101103
true/* fix unknowns */ ,
102104
true/* force SQL99 rules */ );

‎src/backend/parser/parse_func.c

Lines changed: 3 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/parser/parse_func.c,v 1.222 2010/02/26 02:00:52 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/parser/parse_func.c,v 1.223 2010/03/17 16:52:38 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -381,10 +381,7 @@ ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs,
381381

382382
aggref->aggfnoid=funcid;
383383
aggref->aggtype=rettype;
384-
/* args and aggorder will be modified by transformAggregateCall */
385-
aggref->args=fargs;
386-
aggref->aggorder=agg_order;
387-
/* aggdistinct will be set by transformAggregateCall */
384+
/* args, aggorder, aggdistinct will be set by transformAggregateCall */
388385
aggref->aggstar=agg_star;
389386
/* agglevelsup will be set by transformAggregateCall */
390387
aggref->location=location;
@@ -419,7 +416,7 @@ ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs,
419416
parser_errposition(pstate,location)));
420417

421418
/* parse_agg.c does additional aggregate-specific processing */
422-
transformAggregateCall(pstate,aggref,agg_distinct);
419+
transformAggregateCall(pstate,aggref,fargs,agg_order,agg_distinct);
423420

424421
retval= (Node*)aggref;
425422
}

‎src/include/parser/parse_agg.h

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
9-
* $PostgreSQL: pgsql/src/include/parser/parse_agg.h,v 1.42 2010/02/26 02:01:26 momjian Exp $
9+
* $PostgreSQL: pgsql/src/include/parser/parse_agg.h,v 1.43 2010/03/17 16:52:38 tgl Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -16,6 +16,7 @@
1616
#include"parser/parse_node.h"
1717

1818
externvoidtransformAggregateCall(ParseState*pstate,Aggref*agg,
19+
List*args,List*aggorder,
1920
boolagg_distinct);
2021
externvoidtransformWindowFuncCall(ParseState*pstate,WindowFunc*wfunc,
2122
WindowDef*windef);

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