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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-2096) Tweak criteria for when round robin iterator is used
Date Fri, 03 Jul 2015 02:49:04 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-2096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor updated PHOENIX-2096:
----------------------------------
    Attachment: PHOENIX-2096_v2.patch

Original patch was not correct - a merge sort isn't required for your case. I've tweaked the
patch to cleanup a few things, but it should have been working before. Try rebuilding your
indexes - is it possible that you've updated existing rows by mistake (as I notice you've
declared your table as having immutable rows).

> Tweak criteria for when round robin iterator is used
> ----------------------------------------------------
>
>                 Key: PHOENIX-2096
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2096
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: James Taylor
>         Attachments: PHOENIX-2096.patch, PHOENIX-2096_v2.patch
>
>
> Date: Wed, 1 Jul 2015 14:34:24 -0700
> Subject: Re: Problem in finding the largest value of an indexed column
> From: Yufan Liu <yliu33@kent.edu>
> To: user@phoenix.apache.org
> When I made more tests, I find that this problem happens after table got split.
> Here is the DDL I use to create table and index:
> CREATE TABLE IF NOT EXISTS t1 (  
> uid BIGINT NOT NULL,  
> timestamp BIGINT NOT NULL, 
> eventName VARCHAR
> CONSTRAINT my_pk PRIMARY KEY (uid,  timestamp)) COMPRESSION='SNAPPY';
> CREATE INDEX timestamp_index ON t1 (timestamp) INCLUDE (eventName)
> Attach is the sample data I used for test. It has about 4000 rows, when the timestamp_index
table has one region, the query returns correct result: 1433334048443, but when I manually
split it into 4 regions (use hbase tool), it returns 1433333024961.



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