The Query Activity should allow the user to paste or type a query into a text editor. This editor will highlight keywords as SQL editors normally do.
Then, the developer can assign the query to an existent variable (or create the variable initialized with the query.
Currently, queries can only being pasted into a variable of type textbox. This means, we need to ensure that any comment in the query its removed which is annoying.
Also, if we wish to do modifications its annoying because we need to keep a separated file to do so. Retrieving the query from the variable textbox just give us a one long line query which is hard to edit.