Hi!
Rather simple script (original query was a 500 lines of SQL with >100 Mb of
gzipped dump. Query is looked strange, but actually it was auto-generated):
CREATE TABLE t (a int, b int);
CREATE TABLE tt (c int);
INSERT INTO t VALUES (1,1), (2,2);
INSERT INTO tt VALUES (2);
SELECT
*
FROM
t
WHERE (
CASE
WHEN a%2 IN (SELECT c FROM tt) THEN a
END IN (SELECT c FROM tt)
);
I suppose, the problem is connected to hashed subplan, but I'm not very familiar
with executor. And this affects all supported versions of pgsql.
--
Teodor Sigaev E-mail: teo...@sigaev.ru
WWW: http://www.sigaev.ru/
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