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Re: Re: OLAP, Aggregates, and order of operations

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: OLAP, Aggregates, and order of operations
Date: 2001-08-24 04:22:51
Message-ID: 1521.998626971@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
mlw <markw(at)mohawksoft(dot)com> writes:
> So, what would the order of operation be?

> I assume "my_array_constructor()" would be called first, and the return value
> then be passed to "my_aggregate()" along with the state value being set to the
> initial state, then subsequent calls to "my_array_constructor()", followed by
> "my_aggregate()" for each additional row in the group?

Check.

			regards, tom lane

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