I just saw your message while looking to see if anyone else is using this for sqlite. (削除) If you haven't tried it, yet, it doesn't seem to be working (削除ここまで). After getting everything set up, the generate gives me a "duplicate query name" error on the first query in my file every time...no matter what I change it to. I ran through the quick tutorial, and it looks promising once sqlite support gets out of beta.
Edit:
It seems that you have to group all of the queries for a given table together in the query file in order for it to parse correctly.