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https://issues.apache.org/jira/browse/HIVE-17193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216227#comment-16216227
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Rui Li commented on HIVE-17193:
-------------------------------
Hi [~stakiar], I meant we can compare DPP sink works the same way we compare
other works. If two DPP works have the same operator tree, they will have the
same output. I'll provide a PoC patch and more details in HIVE-17877.
> HoS: don't combine map works that are targets of different DPPs
> ---------------------------------------------------------------
>
> Key: HIVE-17193
> URL: https://issues.apache.org/jira/browse/HIVE-17193
> Project: Hive
> Issue Type: Bug
> Reporter: Rui Li
> Assignee: Rui Li
>
> Suppose {{srcpart}} is partitioned by {{ds}}. The following query can trigger
> the issue:
> {code}
> explain
> select * from
> (select srcpart.ds,srcpart.key from srcpart join src on srcpart.ds=src.key)
> a
> join
> (select srcpart.ds,srcpart.key from srcpart join src on
> srcpart.ds=src.value) b
> on a.key=b.key;
> {code}
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