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Posted to github@arrow.apache.org by "Jefffrey (via GitHub)" <gi...@apache.org> on 2023/02/27 10:57:08 UTC

[GitHub] [arrow-datafusion] Jefffrey commented on issue #5410: Join two tables with the same schema, then union throws `SchemaError(DuplicateUnqualifiedField )`

Jefffrey commented on issue #5410:
URL: https://github.com/apache/arrow-datafusion/issues/5410#issuecomment-1446112309

   Issue seems to be here:
   
   https://github.com/apache/arrow-datafusion/blob/5ffa8d78f7e5796fa7c2f98b19346576ab2a4bb8/datafusion/expr/src/logical_plan/builder.rs#L1085-L1111
   
   Specifically where it strips the qualifier from the generated `DFField`
   
   A solution could be to grab the left field qualifier here instead of wiping it.


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