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He Yongqiang commented on HIVE-741: ----------------------------------- +1. The patch looks good to me. (Only have one minor comment on the name of "hasNullElements", should we rename it since this function is used to determine all keys are null?) > NULL is not handled correctly in join > ------------------------------------- > > Key: HIVE-741 > URL: https://issues.apache.org/jira/browse/HIVE-741 > Project: Hadoop Hive > Issue Type: Bug > Reporter: Ning Zhang > Assignee: Amareshwari Sriramadasu > Attachments: patch-741-1.txt, patch-741-2.txt, patch-741-3.txt, > patch-741-4.txt, patch-741-5.txt, patch-741.txt, smbjoin_nulls.q.txt > > > With the following data in table input4_cb: > Key Value > ------ -------- > NULL 325 > 18 NULL > The following query: > {code} > select * from input4_cb a join input4_cb b on a.key = b.value; > {code} > returns the following result: > NULL 325 18 NULL > The correct result should be empty set. > When 'null' is replaced by '' it works. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.