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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/08 16:54:01 UTC

[GitHub] [arrow-datafusion] WinkerDu commented on pull request #2144: fix `not(null)` with constant `null`

WinkerDu commented on PR #2144:
URL: https://github.com/apache/arrow-datafusion/pull/2144#issuecomment-1093085616

   > I wonder if it would be helpful to add a test in `datafusion/core/tests/sql` somewhere to show a query like `SELECT null, not(null)` working?
   
   @alamb OK, will add more tests:
   1. `SELECT not(true), not(false)` = `false, true`
   2. `SELECT null, not(null)` = `NULL, NULL`
   3. `SELECT NOT('hi')`, type check error would raise.


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