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Re: BUG #15208: COALESCE with CTE returns NULL - Mailing list pgsql-bugs

From Tom Lane
Subject Re: BUG #15208: COALESCE with CTE returns NULL
Date
Msg-id 15880.1527265484@sss.pgh.pa.us
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In response to BUG #15208: COALESCE with CTE returns NULL  (PG Bug reporting form <noreply@postgresql.org>)
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=?utf-8?q?PG_Bug_reporting_form?= <noreply@postgresql.org> writes:
> When using COALESCE with an aggregate subquery to a CTE, NULL is returned
> instead of the first non-null value in the argument list. Proof-of-concept
> examples are below. I would expect COALESCE to return 0 in these cases. Am I
> missing something? Thanks.

Um ... I get zero from each of your test cases, in all PG versions back
to 9.3.

            regards, tom lane

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