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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12727) refactor Hive strict checks to be more granular, allow order by no limit and no partition filter by default for now
Date Sun, 24 Jan 2016 15:40:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114354#comment-15114354
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Xuefu Zhang commented on HIVE-12727:
------------------------------------

Other than granular control over checks, is "hive.mapred.mode" still effective and does it
mean that all those strict checks are automatically enforced? I'm not clear from the patch/proposal.
Image an admin who has enabled strict mode and now upgrades to 2.0.

> refactor Hive strict checks to be more granular, allow order by no limit and no partition
filter by default for now
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-12727
>                 URL: https://issues.apache.org/jira/browse/HIVE-12727
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Blocker
>         Attachments: HIVE-12727.01.patch, HIVE-12727.02.patch, HIVE-12727.patch
>
>
> Making strict mode the default recently appears to have broken many normal queries, such
as some TPCDS benchmark queries, e.g. Q85:
> Response message: org.apache.hive.service.cli.HiveSQLException: Error while compiling
statement: FAILED: SemanticException [Error 10041]: No partition predicate found for Alias
"web_sales" Table "web_returns"
> We should remove this restriction from strict mode, or change the default back to non-strict.
Perhaps make a 3-value parameter, nonstrict, semistrict, and strict, for backward compat for
people who are relying on strict already.



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