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  1. IMPALA
  2. IMPALA-3776

'describe formatted' broken for avro tables with mismatching column information in hive metastore

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: Impala 2.5.0
    • Fix Version/s: Impala 2.7.0, Impala 2.6.2
    • Component/s: Frontend
    • Labels:
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      Description

      For Avro tables the column information in the underlying database of the Hive metastore can be different from what is specified in the 'avro.schema.url' file. HIVE-6308 aimed to improve upon this, but for older tables the two don't necessarily align.

      There are two possible cases:

      1. Hive's underlying database contains a column, which is not present in the Avro schema file. In this case we encounter a NullPointerException in DescribeResultFactory.java#L189 when trying to lookup the column in our internal table.
      2. The avro schema contains a column, which is not present in the underlying database. In this case the column will not be displayed in describe formatted.

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              • Assignee:
                lv Lars Volker
                Reporter:
                lv Lars Volker
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                • Created:
                  Updated:
                  Resolved: