Someone over on #perl pointed me to this talk which I hadn't heard of before called "extproc_perl: Embedding Perl in Oracle", by Jeff Horwitz.
This is pretty damn awesome. Imagine being able to search an Oracle database using Perl regular expressions. Or using a Perl subroutine as an Oracle stored procedure or trigger. Sweet!
Re:PostgreSQL has had this for quite a while
jhorwitz on 2003-07-14T17:50:25
Like making certain talks run over into yours.;-)
Another option available too for embedding Perl into the database back-end is PostgreSQL in the form of PL/Perl (or PL/PerlU if installed in the untrusted form) - The current limitations of this implementation of Perl though is that PL/Perl functions cannot call each other directly and that these functions cannot be used as triger functions.