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https://issues.apache.org/jira/browse/PIG-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12803863#action_12803863
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Vincent BARAT commented on PIG-1179:
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Actually you are right, there was a typo. But it does not change the issue.
I'll try to give you a sample to reproduce it.
Have you tried it in local mode or clustered mode ? Maybe the issue is only
present in clustered mode....
> Consecutives ORDER BY on the same relation don't work
> -----------------------------------------------------
>
> Key: PIG-1179
> URL: https://issues.apache.org/jira/browse/PIG-1179
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.5.0
> Reporter: Vincent BARAT
>
> It seems there is a bug in PIG when ORDER BY is used twice on the same
> relation using ASC and DESC
> I have the following script:
> imei_start = FOREACH sessions GENERATE imei, start;
> imei_starts = GROUP imei_start BY imei;
> imei_retained_period = FOREACH imei_starts {
> ordered_imei_start = ORDER imei_start BY start DESC;
> first_start = LIMIT ordered_imei_start 1;
> rev_ordered_imei_start = ORDER imei_start BY start ASC;
> last_start = LIMIT rev_ordered_imei_start 1;
> GENERATE group, ordered_imei_start, rev_ordered_imei_start;
> };
> ordered_imei_start and rev_ordered_imei_start are actually the same (they are
> both sorted in the ASC way) and so last_start is always equal to first_start.
> If only one of the 2 ORDER BY is performed, there is no issue.
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