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[SQL] SPARK-6489: Optimize lateral view with explode to not unnecessary columns. #5358

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[SQL] SPARK-6489: Optimize lateral view with explode to not unnecessary columns. #5358

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1b29835
[SQL] SPARK-6489: Optimize lateral view with explode to not read unne…
dreamquster Apr 4, 2015
376d332
[SQL] SPARK-6489: adding test files
dreamquster Apr 4, 2015
644f688
SPARK-6489: explode optimize add project child plan in unittest
dreamquster Apr 8, 2015
9e7aaec
SPARK-6489: explode optimize - push project under generate clause
dreamquster Apr 15, 2015
8909a5d
SPARK-6489: explode optimize - only deal with generate, other
dreamquster Apr 15, 2015
6014acc
SPARK-6489: explode optimize - fixed pruning test
dreamquster Apr 15, 2015
54abc3a
SPARK-6489: explode optimize - restore comparison working directory
dreamquster Apr 15, 2015
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SPARK-6489: explode optimize - only deal with generate, other 
situation return None
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@dreamquster
dreamquster committed Apr 15, 2015
commit 8909a5d14dccc1933a451261bc0e56a2cc876897
5 changes: 3 additions & 2 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -196,12 +196,13 @@ object ColumnPruning extends Rule[LogicalPlan] {
plan match {
case filter @ Filter(_, c) =>
val newChild = collectRefersUntilGen(collectRefers, c)
if (newChild != null) filter.copy(child = newChild) else filter
// null indicate child is not changed
if (newChild != null) filter.copy(child = newChild) else null
case gen @ Generate(_, _, _, _, c) =>
if ((c.outputSet -- collectRefers.filter(c.outputSet.contains)).nonEmpty) {
gen.copy(child = Project(collectRefers.filter(c.outputSet.contains).toSeq, c))
} else {
gen
null
}
case _ => null
}
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