Re: Windowing functions vs aggregates - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Windowing functions vs aggregates
Date
Msg-id 9062.1239716153@sss.pgh.pa.us
Whole thread Raw
In response to Windowing functions vs aggregates  (Teodor Sigaev <teodor@sigaev.ru>)
List pgsql-hackers
Teodor Sigaev <teodor@sigaev.ru> writes:
> Cast of aggregate's type works:
> # select avg(s)::int4 from foo;

> but that doesn't work for with new windowing functions interface:
> # select avg(s)::int4 OVER () from foo;
> ERROR:  syntax error at or near "OVER"
> LINE 1: select avg(s)::int4 OVER () from foo;

> Is that intentional?

You would need to put the cast around the whole "foo() over ()"
construct.  That's not a divisible unit.
        regards, tom lane


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