Re^2: Cannot Remove Redefined Warnings

[Corion]

Ideally, you only ever use a single thread to connect to Oracle, as many C libraries (and that includes database drivers) are not thread-safe.

If you really want to use multiple threads to connect to Oracle simultaneously, you need to make sure that every thread initializes its own, separate database connection.

It might be that you already are doing this and that connect_to_database (resp. the code in DBI) installs new subroutines. Then another approach could be to connect to the database once, before spawning any thread, and close that connection again. This could make the Perl setup happen. Closing the database handle again means that your other threads will not stomp on each other, reusing the master connection.