Andreas Kretschmer <akretschmer@xxxxxxxxxxxxx> writes: > You can check the plan with the auto_explain - Extension, and you can > force the planner to create a plan based on the actual input-value by > using dynamic SQL (EXECUTE 'your query string' inside the function) Steve *is* using EXECUTE, so that doesn't seem to be the answer. I'm wondering about datatype mismatches myself --- the function form is forcing the parameter to be char(9), which is not a constraint imposed in the written-out query. There are lots of other possibilities though. It would be hard to say much without a self-contained example to try. regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance