[ https://issues.apache.org/jira/browse/SPARK-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen updated SPARK-17298: ------------------------------ Priority: Minor (was: Major) Hm, aren't you suggesting that cartesian joins be _allowed_ when explicitly requested, regardless of the global flag? that's not the same as requiring this syntax, which probably isn't feasible as it would break things. > Require explicit CROSS join for cartesian products > -------------------------------------------------- > > Key: SPARK-17298 > URL: https://issues.apache.org/jira/browse/SPARK-17298 > Project: Spark > Issue Type: Story > Components: SQL > Reporter: Srinath > Priority: Minor > > Require the use of CROSS join syntax in SQL (and a new crossJoin DataFrame > API) to specify explicit cartesian products between relations. > By cartesian product we mean a join between relations R and S where there is > no join condition involving columns from both R and S. > If a cartesian product is detected in the absence of an explicit CROSS join, > an error must be thrown. Turning on the spark.sql.crossJoin.enabled > configuration flag will disable this check and allow cartesian products > without an explicit cross join. -- 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