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Re: BUG #4275: Multicolumn subquery expression not allowed on both sides of IS DISTINCT FROM - Mailing list pgsql-bugs

From Tom Lane
Subject Re: BUG #4275: Multicolumn subquery expression not allowed on both sides of IS DISTINCT FROM
Date
Msg-id 3563.1214922756@sss.pgh.pa.us
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In response to BUG #4275: Multicolumn subquery expression not allowed on both sides of IS DISTINCT FROM  ("Carl-Daniel Hailfinger" <c-d.hailfinger.devel.2006@gmx.net>)
Responses Re: BUG #4275: Multicolumn subquery expression not allowed on both sides of IS DISTINCT FROM  (Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>)
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"Carl-Daniel Hailfinger" <c-d.hailfinger.devel.2006@gmx.net> writes:
> This works:
> # SELECT ROW(true,true)=(SELECT true,true);

> This doesn't:
> # SELECT (SELECT true,true)=(SELECT true,true);
> Error:  42601: subquery must return only one column

This is not a bug, since we do not claim support for feature F641.

            regards, tom lane

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