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  1. IMPALA
  2. IMPALA-3838

Codegen HdfsParquetScanner::EvalRuntimeFilters()

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Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • Impala 2.7.0
    • None
    • Backend

    Description

      There is a virtual function call 

       filter_ctxs_[i]->expr->GetValue(row)

      and a big switch statement in RawValue::GetHashValue() (called by RuntimeFilter::Eval). It's called for every row so we may benefit from codegen'ing.

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          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. IMPALA-3360 Unroll loops / replace types in filter logic in PHJ::ProcessBuildBatch()

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. IMPALA-3837 Filtering at scan node using bloom filters is 2x slower than filtering at join

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              kwho Michael Ho
              kwho Michael Ho
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              Dates

                Created:
                Updated:
                Resolved: