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https://issues.apache.org/jira/browse/HIVE-18750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16384005#comment-16384005
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ASF GitHub Bot commented on HIVE-18750:
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Github user sankarh closed the pull request at:
https://github.com/apache/hive/pull/314
> Exchange partition should be disabled on ACID/Insert-only tables with per
> table write ID.
> -----------------------------------------------------------------------------------------
>
> Key: HIVE-18750
> URL: https://issues.apache.org/jira/browse/HIVE-18750
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2, Transactions
> Affects Versions: 3.0.0
> Reporter: Sankar Hariappan
> Assignee: Sankar Hariappan
> Priority: Major
> Labels: ACID, DDL, TODOC3.0, pull-request-available
> Fix For: 3.0.0
>
> Attachments: HIVE-18750.01.patch, HIVE-18750.02.patch
>
>
> Per table write id implementation (HIVE-18192) have introduced write ID per
> table and used write ID to name the delta/base files and also as primary key
> for each row.
> Now, exchange partition have to move delta/base files across tables without
> changing the write ID which causes incorrect results.
> Also, this exchange partition feature is there to support the use-case of
> atomic updates. But with ACID updates, we shall support atomic-updates and
> hence it makes sense to not support exchange partition for ACID and MM tables.
> The qtest file mm_exchangepartition.q test results to be updated after this
> change.
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