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From roger shi <rogershijich...@hotmail.com>
Subject Re: select * clause still case all regionserver crash
Date Mon, 05 Dec 2016 03:07:17 GMT
According to hongbin’s comments in JIRA KYLIN-1936, it fixed limit push down issue when dealing
with multiple segments.

On 04/12/2016, 7:01 PM, "Alberto Ramón" <a.ramonportoles@gmail.com> wrote:

    about KYLIN-1936: what make this change ?
       (keep in mind groups by? keep in mind differents regions ? what is the
    new limit ?)
    
    
    Thanks
    
    2016-12-04 9:39 GMT+01:00 roger shi <rogershijicheng@hotmail.com>:
    
    > The limit push down issue is completely resolved in JIRA KYLIN-1936, which
    > is applied in 1.5.4. So please try kylin 1.5.4.
    >
    > On 02/12/2016, 5:51 PM, "ShaoFeng Shi" <shaofengshi@apache.org> wrote:
    >
    >     I remember hongbin has further optimization on the limit push down
    > after
    >     1.5.3; @hongbin, can you confirm this?
    >
    >     2016-12-02 17:02 GMT+08:00 alaleiwang <alaleiwang@sohu-inc.com>:
    >
    >     > i can see each regionserver scan over 20000000+....
    >     >
    >     > the query "select *"  is called from tableau used by non-technical
    >     > analyst,so we can't force them to bypass such clause  or to do
    > something
    >     > from tableau ...
    >     >
    >     > how can "limit" work for "select *" without "where"?
    >     >
    >     >
    >     >
    >     >
    >     > --
    >     > View this message in context: http://apache-kylin.74782.x6.
    >     > nabble.com/select-clause-still-cause-all-regionserver-
    >     > crash-tp6474p6481.html
    >     > Sent from the Apache Kylin mailing list archive at Nabble.com.
    >     >
    >
    >
    >
    >     --
    >     Best regards,
    >
    >     Shaofeng Shi 史少锋
    >
    >
    >
    

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