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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2016-07-27 17:44:34 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2016-07-27 17:45:05 -0400 |
| commit | 69995c3b3fd64361bb4d3938315f3e88ccc01e53 (patch) | |
| tree | baa39b2acfd1b67781702c5e0b02be00c65fe1fa /src/backend/access/gist/gistvalidate.c | |
| parent | b31875b1fe7131ac29f118efd81c9aba7255eced (diff) | |
| download | postgresql-69995c3b3fd64361bb4d3938315f3e88ccc01e53.tar.gz | |
Fix cost_rescan() to account for multi-batch hashing correctly.
cost_rescan assumed that we don't need to rebuild the hash table when
rescanning a hash join. However, that's currently only true for
single-batch joins; for a multi-batch join we must charge full freight.
This probably has escaped notice because we'd be unlikely to put a hash
join on the inside of a nestloop anyway. Nonetheless, it's wrong.
Fix in HEAD, but don't backpatch for fear of destabilizing plans in
stable releases.
Diffstat (limited to 'src/backend/access/gist/gistvalidate.c')
0 files changed, 0 insertions, 0 deletions