I would welcome if DbVis supported conditional compilation blocks in so far as they get ignored (like removing comments in a preprocess). I actually am only aware of Oracle having this construct.
My point is that I maintain PL/SQL code with large chunks of SQL (selects of a for loop) decorated with conditional compilation blocks. I often copy those SQL statemants to DbVis to run them for the results. If I do not remove the conditional compilation blocks, I get
[Code: 911, SQL State: 22019] ORA-00911: Ungültiges Zeichen [Script position: 1 - 5]
Thanks for picking up the idea.