viirya commented on a change in pull request #23802: [SPARK-26893][SQL] Allow
pushdown of partition pruning subquery filters to file source
URL: https://github.com/apache/spark/pull/23802#discussion_r257455412
##########
File path: sql/core/src/test/scala/org/apache/spark/sql/SubquerySuite.scala
##########
@@ -1281,6 +1283,24 @@ class SubquerySuite extends QueryTest with
SharedSQLContext {
}
}
+ test("SPARK-26893: Allow pushdown of partition pruning subquery filters to
file source") {
+ withTable("a", "b") {
+ spark.range(4).selectExpr("id", "id % 2 AS
p").write.partitionBy("p").saveAsTable("a")
+ spark.range(2).write.saveAsTable("b")
+
+ val df = sql("SELECT * FROM a WHERE p <= (SELECT MIN(id) FROM b)")
+ checkAnswer(df, Seq(Row(0, 0), Row(2, 0)))
+ assert(df.queryExecution.executedPlan match {
+ case WholeStageCodegenExec(fs @ FileSourceScanExec(_, _, _,
partitionFilters, _, _, _))
+ if partitionFilters.exists(ExecSubqueryExpression.hasSubquery) &&
+ fs.inputRDDs().forall(
+ _.asInstanceOf[FileScanRDD].filePartitions.forall(
+ _.files.forall(_.filePath.contains("p=0")))) => true
Review comment:
<del>This asserts partition `p=0` is read, but doesn't assert that other
partitions are not read. Isn't it?</del>
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