DB scheme feeds_importer config type

The type of the config field is text.
I have an importer with about 200 fields to import and had to change the type of the config field in the db to longtext.
This is especially annoying when you type in all your queries hit save and then get a db error like this:

String data, right truncated: 1406 Data too long for column 'config' at row 1: ...

It would be great to have it default to longtext.