PegoraroF10 <marcos@xxxxxxxxxx> writes: > So, how can I know which custom operator is being used on that comparison ? You tell us. I don't know of any common extension that would create a "smallint = text" operator. (A variant theory is that you didn't make a new operator, but an implicit cast from smallint to text. Either way, it almost certainly is a homebrew thing. Or maybe what you are running is not stock Postgres?) It might be interesting to try some direct test, like SELECT 22::smallint = 'foo'::text; For me that gives the same "operator does not exist: smallint = text" error, but I bet your database tries to execute it. regards, tom lane
