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Posted to dev@pig.apache.org by "liyunzhang_intel (JIRA)" <ji...@apache.org> on 2015/04/07 05:32:12 UTC
[jira] [Updated] (PIG-4438) Limit after sort does not work in spark
mode
[ https://issues.apache.org/jira/browse/PIG-4438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
liyunzhang_intel updated PIG-4438:
----------------------------------
Status: Patch Available (was: Open)
> Limit after sort does not work in spark mode
> --------------------------------------------
>
> Key: PIG-4438
> URL: https://issues.apache.org/jira/browse/PIG-4438
> Project: Pig
> Issue Type: Sub-task
> Components: spark
> Reporter: liyunzhang_intel
> Assignee: liyunzhang_intel
> Fix For: spark-branch
>
> Attachments: PIG-4438_1.patch, PIG-4438_2.patch
>
>
> when pig script executes "order" before "limit" in spark mode, the results will be wrong.
> cat testlimit.txt
> 1 orange
> 3 coconut
> 5 grape
> 6 pear
> 2 apple
> 4 mango
> testlimit.pig:
> a = load './testlimit.txt' as (x:int, y:chararray);
> b = order a by x;
> c = limit b 1;
> store c into './testlimit.out';
> the result:
> 1 orange
> 2 apple
> 3 coconut
> 4 mango
> 5 grape
> 6 pear
> the correct result should be:
> 1 orange
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