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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11494) Some positive constant double predicates gets rounded off while negative constants are not
Date Fri, 07 Aug 2015 21:31:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662496#comment-14662496
] 

Pengcheng Xiong commented on HIVE-11494:
----------------------------------------

after the patches in  HIVE-11477 and HIVE-11493, in both pos and neg cases, they will not
get rounded off.

> Some positive constant double predicates gets rounded off while negative constants are
not
> ------------------------------------------------------------------------------------------
>
>                 Key: HIVE-11494
>                 URL: https://issues.apache.org/jira/browse/HIVE-11494
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Pengcheng Xiong
>            Priority: Critical
>
> Check the predicates in filter expression for following queries. It looks closely related
to HIVE-11477 and HIVE-11493
> {code:title=explain select * from orc_ppd where f = -0.07999999821186066;}
> OK
> Stage-0
>    Fetch Operator
>       limit:-1
>       Select Operator [SEL_2]
>          outputColumnNames:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9","_col10","_col11","_col12","_col13"]
>          Filter Operator [FIL_4]
>             predicate:(f = -0.07999999821186066) (type: boolean)
>             TableScan [TS_0]
>                alias:orc_ppd
> {code}
> {code:title=explain select * from orc_ppd where f = 0.07999999821186066;}
> OK
> Stage-0
>    Fetch Operator
>       limit:-1
>       Select Operator [SEL_2]
>          outputColumnNames:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9","_col10","_col11","_col12","_col13"]
>          Filter Operator [FIL_4]
>             predicate:(f = 0.08) (type: boolean)
>             TableScan [TS_0]
>                alias:orc_ppd
> {code}
> Negative strings constants gets rounded off.
> {code:title=explain select * from orc_ppd where f = "-0.07999999821186066";}
> OK
> Stage-0
>    Fetch Operator
>       limit:-1
>       Select Operator [SEL_2]
>          outputColumnNames:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9","_col10","_col11","_col12","_col13"]
>          Filter Operator [FIL_4]
>             predicate:(f = -0.08) (type: boolean)
>             TableScan [TS_0]
>                alias:orc_ppd
> {code}



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