On fre, 2009-11-13 at 03:16 +0000, Andrew Gierth wrote:
> Caveat: as discussed earlier, this patch changes the behaviour of
> array_agg(DISTINCT x) when applied to NULL inputs. Formerly, the NULLs
> were unconditionally skipped; now, they are treated just like DISTINCT
> or GROUP BY normally do.
The right answer to that should be in the SQL standard.
