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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/20 09:33:44 UTC

[GitHub] [arrow-rs] tustvold opened a new issue, #1595: Filtering UnionArray Changes DataType

tustvold opened a new issue, #1595:
URL: https://github.com/apache/arrow-rs/issues/1595

   **Describe the bug**
   
   When filtering a UnionArray the output will only include the types that had at least one value selected by the filter. I think this is a bug, as I would not expect a filter to mutate the schema of the input
   
   **Expected behavior**
   
   This test should pass
   
   ```
   let mut builder = UnionBuilder::new_dense(4);
   builder.append::<Int32Type>("A", 1).unwrap();
   builder.append::<Float64Type>("B", 3.2).unwrap();
   let array = builder.build().unwrap();
   let filter_array = BooleanArray::from(vec![true, false]);
   let c = filter(&array, &filter_array).unwrap();
   
   assert_eq!(array.data_type(), c.data_type())
   ```


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[GitHub] [arrow-rs] tustvold closed issue #1595: Filtering UnionArray Changes DataType

Posted by GitBox <gi...@apache.org>.
tustvold closed issue #1595: Filtering UnionArray Changes DataType
URL: https://github.com/apache/arrow-rs/issues/1595


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[GitHub] [arrow-rs] tfeda commented on issue #1595: Filtering UnionArray Changes DataType

Posted by GitBox <gi...@apache.org>.
tfeda commented on issue #1595:
URL: https://github.com/apache/arrow-rs/issues/1595#issuecomment-1119169356

   The code runs fine for me. Perhaps it got fixed in #1589 or #1632?


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[GitHub] [arrow-rs] tustvold commented on issue #1595: Filtering UnionArray Changes DataType

Posted by GitBox <gi...@apache.org>.
tustvold commented on issue #1595:
URL: https://github.com/apache/arrow-rs/issues/1595#issuecomment-1119352902

   I can't reproduce this even on commits before those changes, so possibly a PEBCAC on my part here :sweat_smile: 


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