jackwener opened a new issue, #9016:
URL: https://github.com/apache/incubator-doris/issues/9016

   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and 
found no similar issues.
   
   
   ### Description
   
   eliminate the `A compare A`
   
    is not null
   
   - EQ:
   - LE:
   - GE:
   - EQ_FOR_NULL:
   
   false
   
   - NE:
   - LT:
   - GT:
   
   ```sql
   where col = col; -> where col is not null;
   
   where col != col; -> where false;
   ```
   
   ### Solution
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [X] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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