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Aggregate functions now support multiple input arguments. I also took

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the opportunity to treat COUNT(*) as a zero-argument aggregate instead
of the old hack that equated it to COUNT(1); this is materially cleaner
(no more weird ANYOID cases) and ought to be at least a tiny bit faster.
Original patch by Sergey Koposov; review, documentation, simple regression
tests, pg_dump and psql support by moi.
This commit is contained in:
Tom Lane
2006-07-27 19:52:07 +00:00
parent c2d1138351
commit 108fe47301
39 changed files with 702 additions and 484 deletions
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5
src/include/parser/parse_agg.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/parser/parse_agg.h,v 1.33 2006/03/05 15:58:57 momjian Exp $
* $PostgreSQL: pgsql/src/include/parser/parse_agg.h,v 1.34 2006/07/27 19:52:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,7 +19,8 @@ extern void transformAggregateCall(ParseState *pstate, Aggref *agg);
extern void parseCheckAggregates(ParseState *pstate, Query *qry);
extern void build_aggregate_fnexprs(Oid agg_input_type,
extern void build_aggregate_fnexprs(Oid *agg_input_types,
int agg_num_inputs,
Oid agg_state_type,
Oid agg_result_type,
Oid transfn_oid,