SQLCA shared between bound procedures?

I'm just now delving into the depths of embedded SQL. One thing I'd like to do is to put SQL error handling into a service program module. Are the contents of the SQLCA unique for each procedure/module? (RPGLE specifically - RPG's SQL pre-compiler inserts all SQL data definitions.)

I.E. Main program has enbedded SQL. It is bound to a Service Program with a procedure that performs a GET DIAGNOSTICS. Since the GET DIAG returns values from SQL's data pool, will it see the data in the primary program, or return whatever is in the procedure's local area?