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[SPARK-13871][SQL] Support for inferring filters from data constraints #11665

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sameeragarwal wants to merge 4 commits into from
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[SPARK-13871][SQL] Support for inferring filters from data constraints #11665

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382903b
Add InferFiltersFromConstraints rule
sameeragarwal Mar 11, 2016
df96e97
style fixes
sameeragarwal Mar 14, 2016
7210def
Xiao's comments
sameeragarwal Mar 14, 2016
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Nong's comments
sameeragarwal Mar 16, 2016
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style fixes
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@sameeragarwal
sameeragarwal committed Mar 16, 2016
commit df96e9752a8a68acbb983c06883a88af48068c90
4 changes: 2 additions & 2 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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Expand Up @@ -632,7 +632,7 @@ object InferFiltersFromConstraints extends Rule[LogicalPlan] with PredicateHelpe
filter
}

case join@Join(left, right, joinType, conditionOpt) =>
case join @ Join(left, right, joinType, conditionOpt) =>
val additionalConstraints = join.constraints.filter { c =>
// Only consider constraints that can be pushed down to either the left or the right child
c.references.subsetOf(left.outputSet) || c.references.subsetOf(right.outputSet)} --
Expand All @@ -642,7 +642,7 @@ object InferFiltersFromConstraints extends Rule[LogicalPlan] with PredicateHelpe
val newFilters = additionalConstraints -- splitConjunctivePredicates(condition)
if (newFilters.nonEmpty) Option(And(newFilters.reduce(And), condition)) else None
case None =>
if (additionalConstraints.nonEmpty) Option(additionalConstraints.reduce(And)) else None
additionalConstraints.reduceOption(And)
}
if (newConditionOpt.isDefined) Join(left, right, joinType, newConditionOpt) else join
}
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