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From "Lefty Leverenz (JIRA)" <>
Subject [jira] [Commented] (HIVE-5718) Support direct fetch for lateral views, sub queries, etc.
Date Wed, 06 Aug 2014 04:52:11 GMT


Lefty Leverenz commented on HIVE-5718:

Doc note:  This is mentioned in the wiki as unfinished work, so the wiki should be revised
when this is committed.

* [Configuration Properties -- hive.fetch.task.conversion |]

Supported values are minimal and more.
1. minimal:  SELECT *, FILTER on partition columns (WHERE and HAVING clauses), LIMIT only
2. more:  SELECT, FILTER, LIMIT only (including TABLESAMPLE, virtual columns)
"more" can take any kind of expressions in the SELECT clause, including UDFs.
*(UDTFs and lateral views are not yet supported – see HIVE-5718.)*

> Support direct fetch for lateral views, sub queries, etc.
> ---------------------------------------------------------
>                 Key: HIVE-5718
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Trivial
>         Attachments: D13857.1.patch, D13857.2.patch, D13857.3.patch, HIVE-5718.4.patch.txt,
HIVE-5718.5.patch.txt, HIVE-5718.6.patch.txt
> Extend HIVE-2925 with LV and SubQ.

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