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  1. IMPALA
  2. IMPALA-4944

COMPUTE STATS on non-primitive columns

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: Impala 2.9.0
    • Fix Version/s: None
    • Component/s: Catalog

      Description

      Currently Impala does not compute the stats for complex-type columns, as per the docs:

      Currently, the statistics created by the COMPUTE STATS statement do not include information about complex type columns. The column stats metrics for complex columns are always shown as -1. For queries involving complex type columns, Impala uses heuristics to estimate the data distribution within such columns.

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            • Assignee:
              Unassigned
              Reporter:
              mszurap_impala_de3d Miklos Szurap
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              Dates

              • Created:
                Updated: