Can I use mysyql valid queries in the properties?

I already have a ‘User’ table (which would allow spaces in ‘user_names’ column ) and I want to integrate my ‘User’ table with openFire,

From this document Openfire: Custom Database Integration Guide In ‘Authentication Integration’ section ,

It is mentioned to set this property ‘jdbcAuthProvider.passwordSQL’ to the mysql query similar to

SELECT password FROM user_account WHERE username=?

Can I use valid mysql queries in this properties

for example :

SELECT password FROM user_account WHERE replace (user_names, ’ ', ‘’) =?

as usernames with spaces for sasl authentication is not a valid jabber id .

Note: I cannot update ‘user_names’ in my remote database but the clients connected to openfire will report ‘user_names’ without spaces.