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Posted to reviews@spark.apache.org by gatorsmile <gi...@git.apache.org> on 2018/04/10 16:58:24 UTC

[GitHub] spark pull request #16578: [SPARK-4502][SQL] Parquet nested column pruning

Github user gatorsmile commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16578#discussion_r180495402
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala ---
    @@ -151,6 +151,9 @@ abstract class Optimizer(sessionCatalog: SessionCatalog)
         // The following batch should be executed after batch "Join Reorder" and "LocalRelation".
         Batch("Check Cartesian Products", Once,
           CheckCartesianProducts) :+
    +    Batch("Field Extraction Pushdown", fixedPoint,
    +      AggregateFieldExtractionPushdown,
    +      JoinFieldExtractionPushdown) :+
    --- End diff --
    
    @mallman Could you split these new optimizer rules to two PRs first?


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