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Posted to dev@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2013/05/27 08:39:27 UTC
[jira] [Updated] (HIVE-4614) Support outer lateral view
[ https://issues.apache.org/jira/browse/HIVE-4614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Navis updated HIVE-4614:
------------------------
Status: Patch Available (was: Open)
> Support outer lateral view
> --------------------------
>
> Key: HIVE-4614
> URL: https://issues.apache.org/jira/browse/HIVE-4614
> Project: Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
>
> New grammar suggested by [~appodictic] in https://issues.apache.org/jira/browse/HIVE-3534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13665247#comment-13665247
> If UDTF-alias for lateral view forwarded nothing for a input row, regard it as nulls are forwarded keeping columns on select-alias, for example.
> {noformat}
> >select * from src LATERAL VIEW explode(array()) C AS a limit 10;
> {noformat}
> returns nothing because UDTF-alias forwards nothing. But with new grammar,
> {noformat}
> >select * from src LATERAL VIEW OUTER explode(array()) C AS a limit 10;
> ...
> 238 val_238 NULL
> 86 val_86 NULL
> 311 val_311 NULL
> 27 val_27 NULL
> 165 val_165 NULL
> 409 val_409 NULL
> 255 val_255 NULL
> 278 val_278 NULL
> 98 val_98 NULL
> 484 val_484 NULL
> {noformat}
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