The following bug has been logged on the website:
Bug reference: 8393
Logged by: Evan Martin
Email address: postgre...@realityexists.net
PostgreSQL version: 9.2.4
Operating system: Windows 7 x64 SP1
Description:
version(): PostgreSQL 9.2.4, compiled by Visual C++ build 1600, 64-bit
Run the following:
CREATE OR REPLACE FUNCTION test_group_by()
RETURNS TABLE (my_col varchar(5))
AS $BODY$
SELECT 'hello'::varchar(5);
$BODY$ LANGUAGE sql STABLE;
SELECT my_col
FROM test_group_by()
GROUP BY 1;
Expected result:
'hello'
Actual result:
ERROR: failed to locate grouping columns
Interestingly, if the function is marked "VOLATILE" it works. Casting the
result to "text" also makes it work.
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