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  1. IMPALA
  2. IMPALA-6627

Document Hive-incompatible behavior with the serialization.null.format table property

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Impala 2.12.0
    • Component/s: Docs
    • Labels:
      None
    • Epic Color:
      ghx-label-8

      Description

      Impala only respects the "serialization.null.format" table property for TEXT tables and ignores it for Parquet and other formats.

      Hive respects the "serialization.null.format" property even for other formats, converting matching values to NULL during the scan.

      There's is a separate discussion to be had about which behavior makes more sense, but let's document this as an incompatibility for now since it has come up several times already.

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            • Assignee:
              arodoni_cloudera Alex Rodoni
              Reporter:
              alex.behm Alexander Behm
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              • Created:
                Updated:
                Resolved: