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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/04/01 14:28:00 UTC
[jira] [Commented] (SPARK-34354) CostBasedJoinReorder can fail on
self-join
[ https://issues.apache.org/jira/browse/SPARK-34354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17313202#comment-17313202 ]
Apache Spark commented on SPARK-34354:
--------------------------------------
User 'Ngone51' has created a pull request for this issue:
https://github.com/apache/spark/pull/32027
> CostBasedJoinReorder can fail on self-join
> ------------------------------------------
>
> Key: SPARK-34354
> URL: https://issues.apache.org/jira/browse/SPARK-34354
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: wuyi
> Priority: Major
>
>
> For example:
> {code:java}
> test("join reorder with self-join") {
> val plan = t2.join(t1, Inner, Some(nameToAttr("t1.k-1-2") === nameToAttr("t2.k-1-5")))
> .select(nameToAttr("t1.v-1-10"))
> .join(t2, Inner, Some(nameToAttr("t1.v-1-10") === nameToAttr("t2.k-1-5")))
> // this can fail
> Optimize.execute(plan.analyze)
> }
> {code}
> error:
> {code:java}
> [info] java.lang.AssertionError: assertion failed
> [info] at scala.Predef$.assert(Predef.scala:208)
> [info] at org.apache.spark.sql.catalyst.optimizer.JoinReorderDP$.search(CostBasedJoinReorder.scala:178)
> [info] at org.apache.spark.sql.catalyst.optimizer.CostBasedJoinReorder$.org$apache$spark$sql$catalyst$optimizer$CostBasedJoinReorder$$reorder(CostBasedJoinReorder.scala:64)
> [info] at org.apache.spark.sql.catalyst.optimizer.CostBasedJoinReorder$$anonfun$1.applyOrElse(CostBasedJoinReorder.scala:45)
> [info] at org.apache.spark.sql.catalyst.optimizer.CostBasedJoinReorder$$anonfun$1.applyOrElse(CostBasedJoinReorder.scala:41)
> [info] at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformDown$1(TreeNode.scala:317)
> [info] at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:73)
> [info] at org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:317)
> [info] at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformDown(LogicalPlan.scala:29)
> [info] at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformDown(AnalysisHelper.scala:171)
> [info] at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformDown$(AnalysisHelper.scala:169)
> [info] at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformDown(LogicalPlan.scala:29)
> [info] at org.apache.spark.sql.catalyst.optimizer.CostBasedJoinReorder$.apply(CostBasedJoinReorder.scala:41)
> [info] at org.apache.spark.sql.catalyst.optimizer.CostBasedJoinReorder$.apply(CostBasedJoinReorder.scala:35)
> {code}
>
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