Hello I rechecked performance of dynamic SQL and it is significantly slower in 9.2 than 9.1
-- 9.1 postgres=# create or replace function test() returns void as $$ begin for i in 1..1000000 loop execute 'select 1'; end loop; end $$ language plpgsql; CREATE FUNCTION postgres=# \timing Timing is on. postgres=# select test(); test ------ (1 row) Time: 7652.904 ms postgres=# select test(); test ------ (1 row) Time: 7828.025 ms -- 9.2 postgres=# create or replace function test() returns void as $$ begin for i in 1..1000000 loop execute 'select 1'; end loop; end $$ language plpgsql; CREATE FUNCTION Time: 59.272 ms postgres=# select test(); test ------ (1 row) Time: 11153.646 ms postgres=# select test(); test ------ (1 row) Time: 11081.899 ms This test is synthetic, but it shows so somebody who use dynamic SQL in triggers (for partitioning) can has slower operations. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
