[GitHub] [arrow-rs] tustvold opened a new issue, #1681: Incorrect Repeated Field Schema Inference

[GitBox <gi...@apache.org>]

tustvold opened a new issue, #1681:
URL: https://github.com/apache/arrow-rs/issues/1681

   **Describe the bug**
   
   The schema inference logic in parquet does not infer the correct nullability for nested types.
   
   For example
   
   ```
   let message_type = "
   message test_schema {
     OPTIONAL INT32 leaf1;
     REPEATED GROUP outerGroup {
       OPTIONAL INT32 leaf2;
       REPEATED GROUP innerGroup {
         OPTIONAL INT32 leaf3;
       }
     }
   }
   ";
   let parquet_group_type = parse_message_type(message_type).unwrap();
   let parquet_schema = SchemaDescriptor::new(Arc::new(parquet_group_type));
   let converted_arrow_schema =
   parquet_to_arrow_schema(&parquet_schema, None).unwrap();
   ```
   
   Will infer innerGroup and outerGroup as nullable lists with nullable elements, when they are neither.
   
   **To Reproduce**
   
   See test
   
   **Expected behavior**
   
   The nullability should be inferred correctly
   
   **Additional context**
   
   This has likely been hidden by the lack of support for repeated fields - https://github.com/apache/arrow-rs/issues/1680
   


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[GitHub] [arrow-rs] alamb closed issue #1681: Incorrect Repeated Field Schema Inference

[GitBox <gi...@apache.org>]

alamb closed issue #1681: Incorrect Repeated Field Schema Inference
URL: https://github.com/apache/arrow-rs/issues/1681


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