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fix: custom nullability for spark csc
Which issue does this PR close?
- Closes #19167
What changes are included in this PR?
- adds custom nullability for spark
csc
@ANISH-SR We require that all the PR have unit test, please add unit tests for your changes.
@ANISH-SR We require that all the PR have unit test, please add unit tests for your changes.
done!
The PR is about string/format_string, not about trigonometry/csc. Please update the title and the link to the issue.