pgsql-server/src/backend/executor nodeAgg.c

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql-server/src/backend/executor nodeAgg.c
Date: 2003-02-04 00:48:23
Message-ID: 20030204004823.496164758E1@postgresql.org
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CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl(at)postgresql(dot)org 03/02/03 19:48:23

Modified files:
src/backend/executor: nodeAgg.c

Log message:
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.

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