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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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4
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.191 2006/07/03 22:45:39 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.192 2006/07/27 19:52:05 tgl Exp $
*
* NOTES
* Path and Plan nodes do not have any readfuncs support, because we
@ -348,7 +348,7 @@ _readAggref(void)
READ_OID_FIELD(aggfnoid);
READ_OID_FIELD(aggtype);
READ_NODE_FIELD(target);
READ_NODE_FIELD(args);
READ_UINT_FIELD(agglevelsup);
READ_BOOL_FIELD(aggstar);
READ_BOOL_FIELD(aggdistinct);