[GitHub] [spark] ulysses-you commented on a diff in pull request #42003: [SPARK-44426][SQL] Optimize adaptive skew join for ExistenceJoin

["ulysses-you (via GitHub)" <gi...@apache.org>]

ulysses-you commented on code in PR #42003:
URL: https://github.com/apache/spark/pull/42003#discussion_r1267617871


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sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala:
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@@ -874,6 +875,96 @@ 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", "skewData3", "skewData4") {

Review Comment:
   Can we simplify and clear the test a bit? We can make tests using one join that one side is a skewed table and other side is not. Then we can switch it's side to verify what happens if the skewed side is on left or right.



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