maryannxue commented on code in PR #37014:
URL: https://github.com/apache/spark/pull/37014#discussion_r913956001
##########
sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala:
##########
@@ -2602,6 +2602,59 @@ class AdaptiveQueryExecSuite
assert(findTopLevelBroadcastNestedLoopJoin(adaptivePlan).size == 1)
}
}
+
+ test("SPARK-39624 Support coalesce partition through CartesianProduct") {
+ def checkResultPartition(
+ df: Dataset[Row],
+ numShuffleReader: Int,
+ numPartition: Int): Unit = {
+ df.collect()
+ assert(collect(df.queryExecution.executedPlan) {
+ case r: AQEShuffleReadExec => r
+ }.size === numShuffleReader)
+ assert(df.rdd.partitions.length === numPartition)
+ }
+ withSQLConf(SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> "true",
+ SQLConf.COALESCE_PARTITIONS_ENABLED.key -> "true",
+ SQLConf.ADVISORY_PARTITION_SIZE_IN_BYTES.key -> "1048576",
+ SQLConf.COALESCE_PARTITIONS_MIN_PARTITION_NUM.key -> "1",
+ SQLConf.SHUFFLE_PARTITIONS.key -> "10") {
+ withTempView("t1", "t2", "t3") {
+ spark.sparkContext.parallelize((1 to 10).map(i => TestData(i,
i.toString)), 2)
+ .toDF().createOrReplaceTempView("t1")
+ spark.sparkContext.parallelize((1 to 10).map(i => TestData(i,
i.toString)), 4)
+ .toDF().createOrReplaceTempView("t2")
+ spark.sparkContext.parallelize((1 to 10).map(i => TestData(i,
i.toString)), 4)
+ .toDF().createOrReplaceTempView("t3")
+ // positive test that could be coalesced
Review Comment:
can you explain a little more in the code comment why a query `can` (not
could) be coalesced or why it can't?
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