"soni de" <soni.de@xxxxxxxxx> writes: > I am getting following error while inserting a row into the "abc" table: > *ERROR: fmgr_info: function 2720768: cache lookup failed* What PG version is this? (I can tell from the spelling of the error message that it's older than 7.4.) If it's pre-7.3 then the answer is probably that you dropped and re-created the function, and now need to drop and re-create the trigger to match. 7.3 shouldn't have let you drop a function that has a trigger depending on it, though. BTW this seems a bit off-topic for pgsql-performance. regards, tom lane