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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2004-01-19 03:49:41 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2004-01-19 03:49:41 +0000 |
| commit | 864412fd0a1e8983d4241383f13a5492bc795765 (patch) | |
| tree | 0c2bfa80e1a4eca68f6e51b5595a2ebaf2f5becf /src/interfaces/jdbc/example/Unicode.java | |
| parent | 5c625a9326e37093420044dcc70477cdbdd5f001 (diff) | |
| download | postgresql-864412fd0a1e8983d4241383f13a5492bc795765.tar.gz postgresql-864412fd0a1e8983d4241383f13a5492bc795765.zip | |
Recognize that IN subqueries return already-unique results if they use
UNION/INTERSECT/EXCEPT (without ALL). This adds on to the previous
optimization for subqueries using DISTINCT.
Diffstat (limited to 'src/interfaces/jdbc/example/Unicode.java')
0 files changed, 0 insertions, 0 deletions