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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2008-08-07 01:11:52 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2008-08-07 01:11:52 +0000 |
| commit | 2d1d96b1cea8f67a095e8f28372af4081605f681 (patch) | |
| tree | 91be573dfa6eacbe8a4421d700af3fadc3d1bda8 /src/backend/nodes/outfuncs.c | |
| parent | 3d40d5e70ebe21b7d52467987bffad8aea16f29b (diff) | |
| download | postgresql-2d1d96b1cea8f67a095e8f28372af4081605f681.tar.gz postgresql-2d1d96b1cea8f67a095e8f28372af4081605f681.zip | |
Teach the system how to use hashing for UNION. (INTERSECT/EXCEPT will follow,
but seem like a separate patch since most of the remaining work is on the
executor side.) I took the opportunity to push selection of the grouping
operators for set operations into the parser where it belongs. Otherwise this
is just a small exercise in making prepunion.c consider both alternatives.
As with the recent DISTINCT patch, this means we can UNION on datatypes that
can hash but not sort, and it means that UNION without ORDER BY is no longer
certain to produce sorted output.
Diffstat (limited to 'src/backend/nodes/outfuncs.c')
| -rw-r--r-- | src/backend/nodes/outfuncs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c index 408b9b2a757..26f8fb3810a 100644 --- a/src/backend/nodes/outfuncs.c +++ b/src/backend/nodes/outfuncs.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.330 2008/08/05 02:43:17 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.331 2008/08/07 01:11:48 tgl Exp $ * * NOTES * Every node type that can appear in stored rules' parsetrees *must* @@ -1780,6 +1780,7 @@ _outSetOperationStmt(StringInfo str, SetOperationStmt *node) WRITE_NODE_FIELD(rarg); WRITE_NODE_FIELD(colTypes); WRITE_NODE_FIELD(colTypmods); + WRITE_NODE_FIELD(groupClauses); } static void |