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Posted to issues@hive.apache.org by "Abhishek Somani (JIRA)" <ji...@apache.org> on 2019/03/18 07:42:00 UTC

[jira] [Commented] (HIVE-21165) ACID: pass query hint to the writers to write hive.acid.key.index

    [ https://issues.apache.org/jira/browse/HIVE-21165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16794812#comment-16794812 ] 

Abhishek Somani commented on HIVE-21165:
----------------------------------------

In ACID v2, as every file has only one type of event (insert or delete), isn't hive.acid.key.index not required anymore (as also mentioned in HIVE-20580)?

> ACID: pass query hint to the writers to write hive.acid.key.index
> -----------------------------------------------------------------
>
>                 Key: HIVE-21165
>                 URL: https://issues.apache.org/jira/browse/HIVE-21165
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 3.1.1
>            Reporter: Vaibhav Gumashta
>            Assignee: Vaibhav Gumashta
>            Priority: Major
>
> For the query based compactor from HIVE-20699, the compaction runs as a sql query. However, this mechanism skips over writing hive.acid.key.index for each stripe, which is used to skip over stripes that are not supposed to be read. We need a way to pass a query hint to the writer so that it can write this index data, when invoked from a sql query.



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