SQL-friendly NULLABLE indicator

[sir4ur0n]

Currently the way to specify that a field is nullable is to suffix the type hint with ?, e.g. SELECT x :: text?.
Unfortunately because this is invalid SQL syntax, it makes it harder to copy/paste SQL queries between an SQL editor/PSQL and Haskell.

Have you already considered an SQL-friendly syntax? E.g. using a comment?

SELECT x :: text /*null*/

[nikita-volkov]

I have not and this does sound like a great idea! However this will possibly require some work on the parser, because it likely doesn't support comments for now. I don't have the time for that, so I'm leaving this one open for PRs.