alamb commented on issue #4401:
URL: 
https://github.com/apache/arrow-datafusion/issues/4401#issuecomment-1329666852

   I wonder if there is something wrong with our HAVING clause support 
   
   Specifically, it look like 
   ```sql
   SELECT date_trunc('day', column1) AS day FROM t GROUP BY day HAVING 
date_trunc('day', column1) IS NOT NULL;
   ```
   
   Is treating `date_trunc('day', column1) ` as a column named 
`"date_trunc('day', column1)"` which clearly would not be correct 🤔 
   
   


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