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  1. IMPALA
  2. IMPALA-5628 Parquet support for additional valid decimal representations
  3. IMPALA-7087

Impala is unable to read Parquet decimal columns with lower precision/scale than table metadata

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    Details

    • Type: Sub-task
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Backend

      Description

      This is similar to IMPALA-2515, except relates to a different precision/scale in the file metadata rather than just a mismatch in the bytes used to store the data. In a lot of cases we should be able to convert the decimal type on the fly to the higher-precision type.

      ERROR: File '/hdfs/path/000000_0_x_2' column 'alterd_decimal' has an invalid type length. Expecting: 11 len in file: 8
      

      It would be convenient to allow reading parquet files where the precision/scale in the file can be converted to the precision/scale in the table metadata without loss of precision.

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              • Assignee:
                Unassigned
                Reporter:
                tarmstrong Tim Armstrong
              • Votes:
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                Dates

                • Created:
                  Updated: