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Posted to issues@spark.apache.org by "Xiao Li (JIRA)" <ji...@apache.org> on 2018/01/17 02:01:00 UTC
[jira] [Resolved] (SPARK-23095) Decorrelation of scalar subquery
fails with java.util.NoSuchElementException.
[ https://issues.apache.org/jira/browse/SPARK-23095?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao Li resolved SPARK-23095.
-----------------------------
Resolution: Fixed
Assignee: Dilip Biswal
Fix Version/s: 2.3.0
> Decorrelation of scalar subquery fails with java.util.NoSuchElementException.
> -----------------------------------------------------------------------------
>
> Key: SPARK-23095
> URL: https://issues.apache.org/jira/browse/SPARK-23095
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.2, 2.3.0
> Reporter: Dilip Biswal
> Assignee: Dilip Biswal
> Priority: Major
> Fix For: 2.3.0
>
>
> The following SQL involving scalar correlated query returns a map exception.
> {code:java}
> SELECT t1a
> FROM t1
> WHERE t1a = (SELECT count
> FROM t2
> WHERE t2c = t1c
> HAVING count >= 1)
> {code}
> {code:java}
>
> key not found: ExprId(278,786682bb-41f9-4bd5-a397-928272cc8e4e) java.util.NoSuchElementException: key not found: ExprId(278,786682bb-41f9-4bd5-a397-928272cc8e4e) at scala.collection.MapLike$class.default(MapLike.scala:228) at scala.collection.AbstractMap.default(Map.scala:59) at scala.collection.MapLike$class.apply(MapLike.scala:141) at scala.collection.AbstractMap.apply(Map.scala:59) at org.apache.spark.sql.catalyst.optimizer.RewriteCorrelatedScalarSubquery$.org$apache$spark$sql$catalyst$optimizer$RewriteCorrelatedScalarSubquery$$evalSubqueryOnZeroTups(subquery.scala:378) at org.apache.spark.sql.catalyst.optimizer.RewriteCorrelatedScalarSubquery$$anonfun$org$apache$spark$sql$catalyst$optimizer$RewriteCorrelatedScalarSubquery$$constructLeftJoins$1.apply(subquery.scala:430) at org.apache.spark.sql.catalyst.optimizer.RewriteCorrelatedScalarSubquery$$anonfun$org$apache$spark$sql$catalyst$optimizer$RewriteCorrelatedScalarSubquery$$constructLeftJoins$1.apply(subquery.scala:426)
> {code}
> In this case, after evaluating the HAVING clause "count(*) > 1" statically
> against the binding of aggregtation result on empty input, we determine
> that this query will not have a the count bug. We should simply return
> the evalSubqueryOnZeroTups with empty value.
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