Swinky commented on a change in pull request #34062:
URL: https://github.com/apache/spark/pull/34062#discussion_r714259017
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/dynamicpruning/PartitionPruning.scala
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@@ -201,26 +201,28 @@ object PartitionPruning extends Rule[LogicalPlan] with
PredicateHelper with Join
}
/**
- * Returns whether an expression is likely to be selective
+ * Returns whether an expression is likely to be selective. If the filtering
predicate is on join
+ * key then partition filter can be inferred statically in optimization
phase, hence return false.
*/
- private def isLikelySelective(e: Expression): Boolean = e match {
- case Not(expr) => isLikelySelective(expr)
- case And(l, r) => isLikelySelective(l) || isLikelySelective(r)
- case Or(l, r) => isLikelySelective(l) && isLikelySelective(r)
- case _: StringRegexExpression => true
- case _: BinaryComparison => true
- case _: In | _: InSet => true
- case _: StringPredicate => true
- case _: MultiLikeBase => true
+ private def isLikelySelective(e: Expression, joinKey: Expression): Boolean =
e match {
+ case Not(expr) => isLikelySelective(expr, joinKey)
+ case And(l, r) => isLikelySelective(l, joinKey) || isLikelySelective(r,
joinKey)
+ case Or(l, r) => isLikelySelective(l, joinKey) && isLikelySelective(r,
joinKey)
+ case expr: StringRegexExpression => true &&
!expr.references.subsetOf(joinKey.references)
+ case expr: BinaryComparison => true &&
!expr.references.subsetOf(joinKey.references)
+ case expr: In => true && !expr.references.subsetOf(joinKey.references)
+ case expr: InSet => true && !expr.references.subsetOf(joinKey.references)
+ case expr: StringPredicate => true &&
!expr.references.subsetOf(joinKey.references)
+ case expr: MultiLikeBase => true &&
!expr.references.subsetOf(joinKey.references)
Review comment:
@viirya so is it safe to say predicates defined in this method are the
supported ones?
org.apache.spark.sql.execution.datasources.DataSourceStrategy#translateLeafNodeFilter
thanks for pointing out, I can just make y change for supported filters.
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