[HACKERS] bug in prepared statements, alter table 8.3
postgres=# create table abc (a int, b int); CREATE TABLE Time: 492.417 ms postgres=# insert into abc values (1,2); INSERT 0 1 Time: 16.602 ms postgres=# prepare ins_abc as insert into abc values(1,2); PREPARE Time: 0.248 ms postgres=# alter table abc alter a type numeric; ALTER TABLE Time: 254.847 ms postgres=# EXECUTE ins_abc; INSERT 0 1 Time: 0.452 ms postgres=# select * from abc; ERROR: invalid memory alloc request size 18446744073709551610 :-) h/t to rhodium toad. merlin -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] bug in prepared statements, alter table 8.3
Merlin == Merlin Moncure [EMAIL PROTECTED] writes: Merlin postgres=# alter table abc alter a type numeric; Merlin ALTER TABLE Merlin Time: 254.847 ms Merlin postgres=# EXECUTE ins_abc; Merlin INSERT 0 1 Merlin Time: 0.452 ms Merlin postgres=# select * from abc; Merlin ERROR: invalid memory alloc request size 18446744073709551610 Merlin :-) Merlin h/t to rhodium toad. This is fairly obviously a simple consequence of the lack of plan invalidation, it just happens to be more serious than most (you can, as a normal user, break the backend in a dozen different ways, from bad data or incomprehensible error messages up through SEGVs). -- Andrew (irc:RhodiumToad) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] bug in prepared statements, alter table 8.3
Andrew Gierth [EMAIL PROTECTED] writes: This is fairly obviously a simple consequence of the lack of plan invalidation, it just happens to be more serious than most Hmm, we plugged the correspoding hole on the SELECT side awhile back, but it seems that INSERT/UPDATE may need some defenses too. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
