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From viirya <>
Subject [GitHub] spark pull request: [SPARK-13466][SQL] Remove redundant projects i...
Date Thu, 03 Mar 2016 03:43:42 GMT
Github user viirya commented on a diff in the pull request:
    --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ColumnPruningSuite.scala
    @@ -249,5 +249,26 @@ class ColumnPruningSuite extends PlanTest {
         comparePlans(Optimize.execute(query), expected)
    +  test("Remove redundant Project introduced by column pruning rule") {
    +    val input = LocalRelation(', 'value.string)
    +    val query =
    +      Project(Seq($"x.key", $"y.key"),
    --- End diff --
    Hmm, maybe I shouldn't say that removing redundant Project introduced by column pruning.
It is not accurate. The Project is becoming redundant after column pruning optimizes the plan.

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