cloud-fan commented on a change in pull request #32724:
URL: https://github.com/apache/spark/pull/32724#discussion_r643188106
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File path:
sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala
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@@ -1373,6 +1380,31 @@ class AdaptiveQueryExecSuite
}
}
+ test("SPARK-35585: Support propagate empty relation through project/filter")
{
+ withSQLConf(SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> "true",
+ SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1") {
+ Seq(
+ """
+ |SELECT t1.key, count(*) FROM testData t1
+ | JOIN (SELECT * FROM testData2 WHERE b = 0) t2 ON t1.key = t2.a
Review comment:
So the join is used to produce an empty stage. Shall we simply use sort?
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