I submitted a feature request along with the patches required two years ago:
https://sourceforge.net/tracker/?func=detail&aid=3082918&group_id=121032&atid=689047
They still haven't been incorporated, so I'm going to try again.
Patch datedetector.py so it can match MySQL log dates
Add MySQL filter.
Please can these be added to the next release - the work's been done for you!
MySQL filter
datedetector.py patch