[jira] [Created] (SPARK-22103) Move HashAggregateExec parent consume to a separate function in codegen

["Juliusz Sompolski (JIRA)" <ji...@apache.org>]

Juliusz Sompolski created SPARK-22103:
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             Summary: Move HashAggregateExec parent consume to a separate function in codegen
                 Key: SPARK-22103
                 URL: https://issues.apache.org/jira/browse/SPARK-22103
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.0
            Reporter: Juliusz Sompolski


HashAggregateExec codegen uses two paths for fast hash table and a generic one.
It generates code paths for iterating over both, and both code paths generate the consume code of the parent operator, resulting in that code being expanded twice.
This leads to a long generated function that might be an issue for the compiler (see e.g. SPARK-21603).
I propose to remove the double expansion by generating the consume code in a helper function that can just be called from both iterating loop.



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