[jira] [Commented] (HIVE-20919) Break up UpdateDeleteSemanticAnalyzer

["Eugene Koifman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-20919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16738671#comment-16738671 ] 

Eugene Koifman commented on HIVE-20919:
---------------------------------------

[~mgergely] is this complete or does more need to be done?

> Break up UpdateDeleteSemanticAnalyzer
> -------------------------------------
>
>                 Key: HIVE-20919
>                 URL: https://issues.apache.org/jira/browse/HIVE-20919
>             Project: Hive
>          Issue Type: Improvement
>          Components: Transactions
>    Affects Versions: 3.2.0
>            Reporter: Miklos Gergely
>            Assignee: Miklos Gergely
>            Priority: Major
>             Fix For: 3.2.0
>
>         Attachments: HIVE-20919.01.patch, HIVE-20919.02.patch, HIVE-20919.03.patch, HIVE-20919.04.patch, HIVE-20919.05.patch, HIVE-20919.06.patch, HIVE-20919.07.patch
>
>
> UpdateDeleteSemanticAnalyzer handles update, delete, acid export and merge queries by rewriting them to a different form. This is a clear violation of [SRP|https://en.wikipedia.org/wiki/Single_responsibility_principle], and therefore needs to be refactored. An abstract ancestor needs to take the common part, and each of the specific tasks should be handled by a separate class.



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