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Detect duplicate aggregate calls and evaluate only one copy. This

author Tom Lane <tgl@sss.pgh.pa.us>

Tue, 4 Feb 2003 00:48:23 +0000 (00:48 +0000)

committer Tom Lane <tgl@sss.pgh.pa.us>

Tue, 4 Feb 2003 00:48:23 +0000 (00:48 +0000)

commit 85caf1784a318afdd3c4ba66ffd23c0d0af99cd6

tree 9b435b860726eb02ec116f723e3dc7f1da3872de tree

parent ef5842b5f718437b504e801258025b188f764380 commit | 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.

src/backend/executor/nodeAgg.c diff | blob | blame | history

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