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From "Wang Haihua (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-12727) refactor Hive strict checks to be more granular, allow order by no limit and no partition filter by default for now
Date Wed, 11 Oct 2017 14:53:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16200401#comment-16200401
] 

Wang Haihua edited comment on HIVE-12727 at 10/11/17 2:52 PM:
--------------------------------------------------------------

Hi [~xuefuz] [~sershe], 

should we follow the meaning of legacy default nonstrict value of {{hive.mapred.mode}}, which
means that {{hive.strict.checks.cartesian.product }} should has default value of false?

I suppose this will be welcome to the legacy user for compatibility.

In my case, change {{hive.mapred.mode}} to null, will result in many SQL including cartesian
product executed error.

Thanks!




was (Author: wanghaihua):
Hi, should we follow the meaning of legacy default nonstrict value of {{hive.mapred.mode}},
which means that {{hive.strict.checks.cartesian.product }} should has default value of false?

I suppose this will be welcome to the legacy user for compatibility.

In my case, change {{hive.mapred.mode}} to null, will result in many SQL including cartesian
product executed error.

cc [~xuefuz] [~sershe]]



> 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
>              Labels: TODOC2.0
>             Fix For: 2.0.0
>
>         Attachments: HIVE-12727.01.patch, HIVE-12727.02.patch, HIVE-12727.03.patch, HIVE-12727.04.patch,
HIVE-12727.05.patch, HIVE-12727.06.patch, HIVE-12727.07.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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