beliefer commented on a change in pull request #34738:
URL: https://github.com/apache/spark/pull/34738#discussion_r762066369
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File path: sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCV2Suite.scala
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@@ -138,11 +140,79 @@ class JDBCV2Suite extends QueryTest with
SharedSparkSession with ExplainSuiteHel
checkPushedLimit(df4, false, 0)
checkAnswer(df4, Seq(Row(1, 19000.00)))
+ val name = udf { (x: String) => x.matches("cat|dav|amy") }
+ val sub = udf { (x: String) => x.substring(0, 3) }
val df5 = spark.read
.table("h2.test.employee")
- .sort("SALARY")
+ .select($"SALARY", $"BONUS", sub($"NAME").as("shortName"))
+ .filter(name($"shortName"))
.limit(1)
+ // LIMIT is pushed down only if all the filters are pushed down
checkPushedLimit(df5, false, 0)
+ checkAnswer(df5, Seq(Row(10000.00, 1000.0, "amy")))
+ }
+
+ private def checkPushedLimit(df: DataFrame, pushed: Boolean, limit: Int):
Unit = {
+ df.queryExecution.optimizedPlan.collect {
+ case relation: DataSourceV2ScanRelation => relation.scan match {
+ case v1: V1ScanWrapper =>
+ if (pushed) {
+ assert(v1.pushedDownOperators.limit === Some(limit))
+ } else {
+ assert(v1.pushedDownOperators.limit.isEmpty)
+ }
+ }
+ }
+ }
+
+ test("simple scan with top N") {
+ val df1 = spark.read.table("h2.test.employee")
+ .where($"dept" === 1).orderBy($"salary").limit(1)
Review comment:
OK
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