[ https://issues.apache.org/jira/browse/SPARK-16804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-16804: ------------------------------------ Assignee: Apache Spark > Correlated subqueries containing LIMIT return incorrect results > --------------------------------------------------------------- > > Key: SPARK-16804 > URL: https://issues.apache.org/jira/browse/SPARK-16804 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.0.0 > Reporter: Nattavut Sutyanyong > Assignee: Apache Spark > Original Estimate: 72h > Remaining Estimate: 72h > > Correlated subqueries with LIMIT could return incorrect results. The rule > ResolveSubquery in the Analysis phase moves correlated predicates to a join > predicates and neglect the semantic of the LIMIT. > Example: > Seq(1, 2).toDF("c1").createOrReplaceTempView("t1") > Seq(1, 2).toDF("c2").createOrReplaceTempView("t2") > sql("select c1 from t1 where exists (select 1 from t2 where t1.c1=t2.c2 LIMIT > 1)").show > +---+ > > | c1| > +---+ > | 1| > +---+ > The correct result contains both rows from T1. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org