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https://issues.apache.org/jira/browse/HIVE-17284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman resolved HIVE-17284.
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Resolution: Won't Fix
hive.acid.key.index is actually need for delete event filtering HIVE-20738
> remove OrcRecordUpdater.deleteEventIndexBuilder
> -----------------------------------------------
>
> Key: HIVE-17284
> URL: https://issues.apache.org/jira/browse/HIVE-17284
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Minor
>
> There is no point in it. We know how many rows a delete_delta file has from
> ORC and they are all the same type - so no need for AcidStats.
> hive.acid.key.index has no value since delete_delta files are never split
> and are not likely to have more than 1 stripe since they are very small.
> Also can remove KeyIndexBuilder.acidStats - we only have 1 type of event per
> file
>
> if doing this, make sure to fix {{OrcInputFormat.isOriginal(Reader)}} and
> {{OrcInputFormat.isOriginal(Footer)}} etc
> there is new KeyIndexBuilder("delete") and new KeyIndexBuilder("insert").
> The later is needed in HIVE-16812, the former can be removed.
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