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https://issues.apache.org/jira/browse/HIVE-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Charles Chen resolved HIVE-2325.
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Resolution: Invalid
Wiki states "The restrictions of using LEFT SEMI JOIN is that the
right-hand-side table should only be referenced in the join condition
(ON-clause), but not in WHERE- or SELECT-clauses etc."
> Left semi join does not allow filter on right table
> ---------------------------------------------------
>
> Key: HIVE-2325
> URL: https://issues.apache.org/jira/browse/HIVE-2325
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.7.1
> Reporter: Charles Chen
>
> Given
> {noformat}
> create table invites (foo int, bar string) partitioned by (ds string);
> create table invites2 (foo int, bar string) partitioned by (ds string);
> explain select * from invites left semi join invites2 on
> invites.ds=invites2.ds where invites2.ds='2011-01-01';
> {noformat}
> an error:
> {noformat}
> FAILED: Error in semantic analysis: Line 1:86 Invalid table alias or column
> reference 'invites2': (possible column names are: _col0, _col1, _col2)
> {noformat}
> is returned.
> Presumably the groupby operation in the semi join doesn't preserve the column
> names?
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