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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-02-04 00:48:23 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-02-04 00:48:23 +0000 |
| commit | 85caf1784a318afdd3c4ba66ffd23c0d0af99cd6 (patch) | |
| tree | 9b435b860726eb02ec116f723e3dc7f1da3872de /doc/src/FAQ/FAQ_DEV.html | |
| parent | ef5842b5f718437b504e801258025b188f764380 (diff) | |
Detect duplicate aggregate calls and evaluate only one copy. This
speeds up some useful real-world cases like
SELECT x, COUNT(*) FROM t GROUP BY x HAVING COUNT(*) > 100.
Diffstat (limited to 'doc/src/FAQ/FAQ_DEV.html')
0 files changed, 0 insertions, 0 deletions