[
https://issues.apache.org/jira/browse/HIVE-17193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214737#comment-16214737
]
Rui Li commented on HIVE-17193:
-------------------------------
Hi [~kellyzly],
bq. how to compare the result of dpp work in the period of physical plan?
We can compare the DPP works the same way as we compare other works, i.e. if
two works have the same operator tree and all the each operator has an
equivalent counterpart, then the two works can be combined.
> 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}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
