But there is no pure Perl driver for Oracle, AFAIK.
You are absolutely correct, because there are no Oracle drivers outside of C/C++ and Java. So, there aren't any pure Haskell drivers, either.
Installing DBD::Oracle is probably the hardest single module install I've ever done, with the possible exception of DBD::mysql.
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.