If you place a comment in the query, using 4.2 beta 1, the rest of the query is ignored. Priviously, you could have several lines that you could comment in / out, to quickly switch things on and off.
This will return all records, not a selection
Code:
select * from mytable
— where c1 = 2 (commented out)
where c1 = 11
This query is ignored completely, nothing is output
Code:
— query to select all records
— test of comments
select * from mytabl