I am developing .Net application using PSQL. I am using npgsql to connect PSQL database. In single database I have more than one schemas. After I connect database I set search path using "Set Searchpath command" for the required schema. It works perfectly.
But after sometime, I need to change schema. so I set again search path using "Set Searchpath command" . Now if I execute a single query the changed search path works correctly. But if I execute a pl/sql function written in background the changed search path does not work.
It is expected behave for older releases and it is fixed in 9.3. PL/pgSQL procedures holds a execution plans in session plan cache and changing search_path didn't invalidate caches. There are two workarounds: a) using special instances of functions for schema, b) change search_path only once after connect, and if you need a new search_path, then disconnect, and create new connect.