amavis quarantine table question

[Deeztek Support via amavis-users]

The documentation states that in the quarantine table the mail_text 
column should be of data type blob instead of text as it was suggested 
before. However, data type blob cannot be indexed will full text in 
mysql thus queries against the mail_text column take a ridiculous amount 
of time to complete. If I was to change the data type to text, what 
effect if any would this have to the functionality of amavis in general?

Thanks