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