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  1. Spark
  2. SPARK-20730

Add a new Optimizer rule to combine nested Concats

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.3.0
    • Fix Version/s: 2.3.0
    • Component/s: SQL
    • Labels:
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      Description

      The master supports a pipeline operator '||' to concatenate strings. Since the parser generates nested Concat expressions, the optimizer needs to combine the nested expressions.

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              • Assignee:
                maropu Takeshi Yamamuro
                Reporter:
                maropu Takeshi Yamamuro
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