caican00 commented on code in PR #42003:
URL: https://github.com/apache/spark/pull/42003#discussion_r1271800576
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sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala:
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@@ -874,6 +875,81 @@ class AdaptiveQueryExecSuite
}
}
+ test("SPARK-44426: Optimize adaptive skew join for ExistenceJoin") {
+ withSQLConf(
+ SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1",
+ SQLConf.COALESCE_PARTITIONS_MIN_PARTITION_NUM.key -> "1",
+ SQLConf.SHUFFLE_PARTITIONS.key -> "100",
+ SQLConf.SKEW_JOIN_SKEWED_PARTITION_THRESHOLD.key -> "800",
+ SQLConf.ADVISORY_PARTITION_SIZE_IN_BYTES.key -> "800") {
+ withTempView("skewData1", "skewData2") {
+ // skewData1
+ spark
+ .range(0, 1000, 1, 10)
+ .select(
+ when('id < 250, 249)
+ .when('id >= 750, 1000)
+ .otherwise('id).as("key1"),
+ 'id as "value1")
+ .createOrReplaceTempView("skewData1")
+ // skewData2
+ spark
+ .range(0, 1000, 1, 10)
+ .select(
+ 'id as "key2",
+ 'id as "value2")
+ .createOrReplaceTempView("skewData2")
+
+ def checkSkewJoin(
+ joins: Seq[SortMergeJoinExec],
+ leftSkewNum: Int,
+ rightSkewNum: Int): Unit = {
+ assert(joins.size == 2 && joins.last.isSkewJoin)
+ assert(joins.last.left.collect {
+ case r: AQEShuffleReadExec => r
+ }.head.partitionSpecs.collect {
+ case p: PartialReducerPartitionSpec => p.reducerIndex
+ }.distinct.length == leftSkewNum)
+ assert(joins.last.right.collect {
+ case r: AQEShuffleReadExec => r
+ }.head.partitionSpecs.collect {
+ case p: PartialReducerPartitionSpec => p.reducerIndex
+ }.distinct.length == rightSkewNum)
+ }
+
+ // skewed ExistenceJoin optimization for left side
+ val (_, existenceAdaptivePlanForLeft) = runAdaptiveAndVerifyResult(
+ s"""
+ |SELECT * FROM skewData1
+ |where
+ |(key1 in (select key2 from skewData2)
+ |or value1 in (select value2 from skewData2)
+ |)""".stripMargin)
Review Comment:
updated.
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