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Re: sum() over (partition by order) question

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: sum() over (partition by order) question
Date: 2008-12-31 21:36:27
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
"Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> writes:
> I didn't expect so ORDER can change result of function sum.

Read the stuff about window frames.  The results you show are
exactly per spec.

			regards, tom lane

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