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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2002-11-19 23:22:00 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2002-11-19 23:22:00 +0000 |
| commit | b60be3f2f8d094da79e04c6eda888f401b09dc39 (patch) | |
| tree | 0590e0647deb5041b8dabcabf03770ebef8e8d43 /src/backend/nodes/copyfuncs.c | |
| parent | 54cb1db6cf4d4bf4e44148582bbd2c99684e7dfd (diff) | |
| download | postgresql-b60be3f2f8d094da79e04c6eda888f401b09dc39.tar.gz postgresql-b60be3f2f8d094da79e04c6eda888f401b09dc39.zip | |
Add an at-least-marginally-plausible method of estimating the number
of groups produced by GROUP BY. This improves the accuracy of planning
estimates for grouped subselects, and is needed to check whether a
hashed aggregation plan risks memory overflow.
Diffstat (limited to 'src/backend/nodes/copyfuncs.c')
| -rw-r--r-- | src/backend/nodes/copyfuncs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index 9dc29584e82..2c345b9f785 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -15,7 +15,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.218 2002/11/15 02:50:06 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.219 2002/11/19 23:21:58 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1865,8 +1865,8 @@ _copyQuery(Query *from) /* * We do not copy the planner internal fields: base_rel_list, - * other_rel_list, join_rel_list, equi_key_list, query_pathkeys. Not - * entirely clear if this is right? + * other_rel_list, join_rel_list, equi_key_list, query_pathkeys, + * hasJoinRTEs. Not entirely clear if this is right? */ return newnode; |