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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/copyfuncs.c
View File

@@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.343 2006/07/14 14:52:19 momjian Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.344 2006/07/27 19:52:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -743,7 +743,7 @@ _copyAggref(Aggref *from)
COPY_SCALAR_FIELD(aggfnoid);
COPY_SCALAR_FIELD(aggtype);
COPY_NODE_FIELD(target);
COPY_NODE_FIELD(args);
COPY_SCALAR_FIELD(agglevelsup);
COPY_SCALAR_FIELD(aggstar);
COPY_SCALAR_FIELD(aggdistinct);

4
src/backend/nodes/equalfuncs.c
View File

@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.277 2006/07/14 14:52:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.278 2006/07/27 19:52:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -156,7 +156,7 @@ _equalAggref(Aggref *a, Aggref *b)
{
COMPARE_SCALAR_FIELD(aggfnoid);
COMPARE_SCALAR_FIELD(aggtype);
COMPARE_NODE_FIELD(target);
COMPARE_NODE_FIELD(args);
COMPARE_SCALAR_FIELD(agglevelsup);
COMPARE_SCALAR_FIELD(aggstar);
COMPARE_SCALAR_FIELD(aggdistinct);

4
src/backend/nodes/outfuncs.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.278 2006/07/14 14:52:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.279 2006/07/27 19:52:05 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@@ -635,7 +635,7 @@ _outAggref(StringInfo str, Aggref *node)
WRITE_OID_FIELD(aggfnoid);
WRITE_OID_FIELD(aggtype);
WRITE_NODE_FIELD(target);
WRITE_NODE_FIELD(args);
WRITE_UINT_FIELD(agglevelsup);
WRITE_BOOL_FIELD(aggstar);
WRITE_BOOL_FIELD(aggdistinct);

4
src/backend/nodes/readfuncs.c
View File

@@ -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);