diff options
| 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/include/nodes/relation.h | |
| parent | f68f11928d5c791873073c882775dae10283ff49 (diff) | |
| download | postgresql-ddb2d78de0172b1f3a00c8e3bf35345af9952f43.tar.gz | |
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/include/nodes/relation.h')
| -rw-r--r-- | src/include/nodes/relation.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index a3f0e36c76..4c06224ecc 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: relation.h,v 1.70 2002/11/27 20:52:04 tgl Exp $ + * $Id: relation.h,v 1.71 2002/11/30 00:08:22 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -464,8 +464,6 @@ typedef struct MergePath * A hashjoin path has these fields. * * The remarks above for mergeclauses apply for hashclauses as well. - * (But note that path_hashclauses will always be a one-element list, - * since we only hash on one hashable clause.) * * Hashjoin does not care what order its inputs appear in, so we have * no need for sortkeys. |