[GitHub] [incubator-doris] morrySnow commented on pull request #9018: [feature](optimizer): rewrite expr self compare

[GitBox <gi...@apache.org>]

morrySnow commented on PR #9018:
URL: https://github.com/apache/incubator-doris/pull/9018#issuecomment-1098820319

   > This still changes the behavior of `null =/>=/<= null`, these output should be `null`, not `0`.
   
   so we only need to rewrite condition expression. Expression in select list should not be rewrite with this rule, right?


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