How the function written on pl/pgsql can be called by the function written on plperl.
Error is:
error from function: Undefined subroutine &Safe::Root2::get_national_code called.....
You probably need to be calling "SELECT get_national_code(...)" to access it via a standard query.
-- Richard Huxton Archonet Ltd
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
