2010/8/10 Tom Lane <tgl@sss.pgh.pa.us>:
> Eventually it might be nice to have some sort of way to specify the
> estimate to use for any aggregate function --- but for a near-term
> fix maybe we should just hard-wire a special case for array_agg in
> count_agg_clauses_walker().
The attached patch is the near-term fix; it adds ALLOCSET_DEFAULT_INITSIZE
bytes to memory assumption.
We might need the same adjustment for string_agg(), that consumes
1024 bytes for the transit condition. array_agg() and string_agg()
are only aggregates that have "internal" for aggtranstype.
--
Itagaki Takahiro
