pgsql/src/backend/storage/smgr (md.c)

From: Tom Lane <tgl>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql/src/backend/storage/smgr (md.c)
Date: 2000-07-17 03:05:14
Message-ID: 200007170305.e6H35E026154@hub.org
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Date: Sunday, July 16, 2000 @ 23:05:13
Author: tgl

Update of /home/projects/pgsql/cvsroot/pgsql/src/backend/storage/smgr
from hub.org:/home/projects/pgsql/tmp/cvs-serv25842/src/backend/storage/smgr

Modified Files:
md.c

----------------------------- Log Message -----------------------------

Revise aggregate functions per earlier discussions in pghackers.
There's now only one transition value and transition function.
NULL handling in aggregates is a lot cleaner. Also, use Numeric
accumulators instead of integer accumulators for sum/avg on integer
datatypes --- this avoids overflow at the cost of being a little slower.
Implement VARIANCE() and STDDEV() aggregates in the standard backend.

Also, enable new LIKE selectivity estimators by default. Unrelated
change, but as long as I had to force initdb anyway...

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