[GitHub] [arrow-datafusion] mingmwang commented on issue #5771: use dataframe to filter with exists subquery,TableScan node added a unexpected projection

["mingmwang (via GitHub)" <gi...@apache.org>]

mingmwang commented on issue #5771:
URL: https://github.com/apache/arrow-datafusion/issues/5771#issuecomment-1488253981

   I think there are 2 issues here.
   1. In the SQL case, the subquery plan inside the sub query expression does not get a chance to run all the optimizer rules,
   this is a known issue.
   2. In the DataFrame case, after apply the push_down_projection  rule, the subquery plan added unnecessary projection


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