Hi, I'd really need to add Firebird SQL support to Limesurvey.
What can I do to do this ?
in the meanwhile, I tried to edit connection string, and I obtained:

CDbConnection does not support reading schema for firebird database.

zufolo441 wrote: What can I do to do this ?

Open a feature request and offer sponsoring.
Or add code yourself on github and make a pullrequest.

Adding support for a database is not as easy as editing a connection string.

I don't see enough user interest in adding support for Firebird soon.

I'd start to study the problem, can someone tell me where to start ? where is located database-specific code in sources ? thanks!

And why not use debugsql ?

LimeSurvey use the Yii1 Framework. So you should start here:
www.yiiframework.com/extension/yiifirebird/