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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-28 23:21:26 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-28 23:21:26 +0000 |
| commit | b39e91501c101d67b92f3e6965da5dc111195f52 (patch) | |
| tree | 1820d8ba0289c5e32a025b9f62bdd98ca494a972 /src/backend/executor/execGrouping.c | |
| parent | 28c480e9ae64fc239fa1ebe32a981312e65ae1e7 (diff) | |
| download | postgresql-b39e91501c101d67b92f3e6965da5dc111195f52.tar.gz postgresql-b39e91501c101d67b92f3e6965da5dc111195f52.zip | |
Improve hash join to discard input tuples immediately if they can't
match because they contain a null join key (and the join operator is
known strict). Improves performance significantly when the inner
relation contains a lot of nulls, as per bug #2930.
Diffstat (limited to 'src/backend/executor/execGrouping.c')
0 files changed, 0 insertions, 0 deletions