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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2002-11-30 00:08:22 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2002-11-30 00:08:22 +0000 |
| commit | ddb2d78de0172b1f3a00c8e3bf35345af9952f43 (patch) | |
| tree | 75aaa2922e21b78514cd592241c1718a2e6a4ba8 /src/backend/optimizer/util/pathnode.c | |
| parent | f68f11928d5c791873073c882775dae10283ff49 (diff) | |
| download | postgresql-ddb2d78de0172b1f3a00c8e3bf35345af9952f43.tar.gz postgresql-ddb2d78de0172b1f3a00c8e3bf35345af9952f43.zip | |
Upgrade planner and executor to allow multiple hash keys for a hash join,
instead of only one. This should speed up planning (only one hash path
to consider for a given pair of relations) as well as allow more effective
hashing, when there are multiple hashable joinclauses.
Diffstat (limited to 'src/backend/optimizer/util/pathnode.c')
| -rw-r--r-- | src/backend/optimizer/util/pathnode.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c index e99435a6edf..98227355605 100644 --- a/src/backend/optimizer/util/pathnode.c +++ b/src/backend/optimizer/util/pathnode.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.80 2002/11/24 21:52:14 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.81 2002/11/30 00:08:20 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -616,7 +616,7 @@ create_mergejoin_path(Query *root, * 'outer_path' is the cheapest outer path * 'inner_path' is the cheapest inner path * 'restrict_clauses' are the RestrictInfo nodes to apply at the join - * 'hashclauses' is a list of the hash join clause (always a 1-element list) + * 'hashclauses' are the RestrictInfo nodes to use as hash clauses * (this should be a subset of the restrict_clauses list) */ HashPath * |