hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12808) Logical PPD: Push filter clauses through PTF into TS
Date Fri, 08 Jan 2016 00:19:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15088452#comment-15088452
] 

Gopal V commented on HIVE-12808:
--------------------------------

thanks [~jpullokkaran] that would be great.

I haven't made any progress beyond the test-case.

> Logical PPD: Push filter clauses through PTF into TS
> ----------------------------------------------------
>
>                 Key: HIVE-12808
>                 URL: https://issues.apache.org/jira/browse/HIVE-12808
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>    Affects Versions: 1.2.1, 2.0.0
>            Reporter: Gopal V
>
> Simplified repro case, with the slow query showing the push-down miss. 
> And the manually rewritten query to indicate the expected one.
> Part of the problem could be the window range not being split apart for PPD, but the
FIL is not pushed down even if the rownum filter is removed.
> {code}
> create temporary table positions (regionid string, id bigint, deviceid string, ts string);
> insert into positions values('1d6a0be1-6366-4692-9597-ebd5cd0f01d1', 1422792010, '6c5d1a30-2331-448b-a726-a380d6b3a432',
'2016-01-01'),
> ('1d6a0be1-6366-4692-9597-ebd5cd0f01d1', 1422792010, '6c5d1a30-2331-448b-a726-a380d6b3a432',
'2016-01-01'),
> ('1d6a0be1-6366-4692-9597-ebd5cd0f01d1', 1422792010, '6c5d1a30-2331-448b-a726-a380d6b3a432',
'2016-01-02'),
> ('1d6a0be1-6366-4692-9597-ebd5cd0f01d1', 1422792010, '6c5d1a30-2331-448b-a726-a380d6b3a432',
'2016-01-02');
> -- slow query
> explain
> WITH t1 AS 
> ( 
>          SELECT   *, 
>                   Row_number() over ( PARTITION BY regionid, id, deviceid ORDER BY ts
DESC) AS rownos
>          FROM     positions ), 
> latestposition as ( 
>        SELECT * 
>        FROM   t1 
>        WHERE  rownos = 1) 
> SELECT * 
> FROM   latestposition 
> WHERE  regionid='1d6a0be1-6366-4692-9597-ebd5cd0f01d1' 
> AND    id=1422792010 
> AND    deviceid='6c5d1a30-2331-448b-a726-a380d6b3a432';
> -- fast query
> explain
> WITH t1 AS 
> ( 
>          SELECT   *, 
>                   Row_number() over ( PARTITION BY regionid, id, deviceid ORDER BY ts
DESC) AS rownos
>          FROM     positions 
>          WHERE  regionid='1d6a0be1-6366-4692-9597-ebd5cd0f01d1' 
>          AND    id=1422792010 
>          AND    deviceid='6c5d1a30-2331-448b-a726-a380d6b3a432'
> ),latestposition as ( 
>        SELECT * 
>        FROM   t1 
>        WHERE  rownos = 1) 
> SELECT * 
> FROM   latestposition 
> ;
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message