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  1. IMPALA
  2. IMPALA-11123

Optimize count(*) for ORC scans

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Details

    • Improvement
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • None
    • Impala 4.1.0
    • None

    Description

      IMPALA-5036 and IMPALA-6501 added an optimisation for count(*) in Parquet and Kudu scans that avoids materialising dummy rows. We should do something similar for ORC.

      Refer IMPALA-5036 for more details.

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            rizaon Riza Suminto
            stigahuang Quanlong Huang
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              Updated:
              Resolved: