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  1. IMPALA
  2. IMPALA-9126

Cleanly separate build and probe state in hash join node

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Impala 3.4.0
    • Component/s: Backend
    • Labels:

      Description

      As a precursor to IMPALA-4224, we should clean up the hash join implementation so that the build and probe state is better separated. The builder should not deal with probe side data structures (like the probe streams that it allocates) and all accesses to the build-side data structures should go through as narrow APIs as possible.

      The nested loop join is already pretty clean.

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            • Assignee:
              tarmstrong Tim Armstrong
              Reporter:
              tarmstrong Tim Armstrong

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