Warn about global window functions (without partition by)

[kaikalur]

They could be slow so good to warn users to instead cross join the result which works better

[kaikalur]

Or better yet - just rewrite it to be a cross-join (optionally)

[tywe00]

I am a student trying to contribute and would like to take work on this issue. Just to make it simple, can you clarify which files need to be modified?

[kaikalur]

I am a student trying to contribute and would like to take work on this issue. Just to make it simple, can you clarify which files need to be modified?

You can look at the analyzer package and expression analyzer. Or you can also do it in the ASTBuilder itself