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  1. Hive
  2. HIVE-3667 Umbrella jira for Correlation Optimizer
  3. HIVE-3671

If a query has been optimized by correlation optimizer, join auto convert cannot optimize it

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    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Not A Problem
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Query Processor
    • Labels:
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      Description

      Currently, if a query has been optimized by correlation optimizer, the first operator at the reduce side will be CorrelationReducerDispatchOperator. Since CommonJoinResolver will only work if the first operator at the reduce side is a join operator, join auto convert cannot optimize this query. This jira is used to discuss how to make correlation optimizer compatible with join auto convert.

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              • Assignee:
                yhuai Yin Huai
                Reporter:
                yhuai Yin Huai
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                • Created:
                  Updated:
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