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From Tom Lane
Subject pgsql/src/backend/commands (define.c user.c)
Date
Msg-id 200007170304.e6H34pm25895@hub.org
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  Date: Sunday, July 16, 2000 @ 23:04:48
Author: tgl

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

Modified Files:
    define.c user.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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