[ https://issues.apache.org/jira/browse/HIVE-14946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eugene Koifman reassigned HIVE-14946: ------------------------------------- Assignee: Eugene Koifman > Optimizations > ------------- > > Key: HIVE-14946 > URL: https://issues.apache.org/jira/browse/HIVE-14946 > Project: Hive > Issue Type: Sub-task > Components: Query Planning, Transactions > Reporter: Eugene Koifman > Assignee: Eugene Koifman > > For example, if there is only WHEN NOT MATCHED clause, the base generating > expression can be an INNER JOIN > Generally, we should make sure the optimizer is able to work with the plan > for Merge statement > Various WHEN clauses can have "extra" predicates. In some cases they may be > pushable. > The "source" can be an arbitrary expression - in particular it may include > joins which together with the join introduced by Merge itself may need to be > reordered. -- This message was sent by Atlassian JIRA (v6.3.4#6332)