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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-2067) Sort order incorrect for variable length DESC columns
Date Thu, 16 Jul 2015 15:43:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-2067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14629904#comment-14629904
] 

ramkrishna.s.vasudevan commented on PHOENIX-2067:
-------------------------------------------------

+1 . Nice tests. Thanks for covering up all the cases [~Dumindux].
[~giacomotaylor]
I was trying to suggest this point only in my review. 

> Sort order incorrect for variable length DESC columns
> -----------------------------------------------------
>
>                 Key: PHOENIX-2067
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2067
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.4.0
>         Environment: HBase 0.98.6-cdh5.3.0
> jdk1.7.0_67 x64
> CentOS release 6.4 (2.6.32-358.el6.x86_64)
>            Reporter: Mykola Komarnytskyy
>            Assignee: James Taylor
>             Fix For: 4.5.0
>
>         Attachments: PHOENIX-2067-tests.patch, PHOENIX-2067-tests2.patch, PHOENIX-2067_addendum.patch,
PHOENIX-2067_array_addendum.patch, PHOENIX-2067_array_addendum_v2.patch, PHOENIX-2067_v1.patch,
PHOENIX-2067_v2.patch, PHOENIX-2067_v3.patch
>
>
> Steps to reproduce:
> 1. Create a table: 
> CREATE TABLE mytable (id BIGINT not null PRIMARY KEY, timestamp BIGINT, log_message varchar)
IMMUTABLE_ROWS=true, SALT_BUCKETS=16;
> 2. Create two indexes:
> CREATE INDEX mytable_index_search ON mytable(timestamp,id) INCLUDE (log_message) SALT_BUCKETS=16;
> CREATE INDEX mytable_index_search_desc ON mytable(timestamp DESC,id DESC) INCLUDE (log_message)
SALT_BUCKETS=16;
> 3. Upsert values:
> UPSERT INTO mytable VALUES(1, 1434983826018, 'message1');
> UPSERT INTO mytable VALUES(2, 1434983826100, 'message2');
> UPSERT INTO mytable VALUES(3, 1434983826101, 'message3');
> UPSERT INTO mytable VALUES(4, 1434983826202, 'message4');
> 4. Sort DESC by timestamp:
> select timestamp,id,log_message from mytable ORDER BY timestamp DESC;
> Failure: data is sorted incorrectly. In case when we have two longs which  are different
only by last two digits (e.g. 1434983826155, 1434983826100)  and one of the long ends with
'00' we receive incorrect order. 
> Sorting result:
> 1434983826202
> 1434983826100
> 1434983826101
> 1434983826018



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