[jira] [Updated] (PHOENIX-2067) Sort order incorrect for variable length DESC columns

["James Taylor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-2067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

James Taylor updated PHOENIX-2067:
----------------------------------
    Attachment: PHOENIX-2067-wip.patch

WIP patch. Unit tests pass along with new ones that demonstrate the issue.

> 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
>         Attachments: PHOENIX-2067-wip.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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