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https://issues.apache.org/jira/browse/PHOENIX-6115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17188096#comment-17188096
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Lars Hofhansl commented on PHOENIX-6115:
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-v2 should be good. Passes tests I ran as well as local testing.
Also fixed up the use of generics a bit while I was in there.
Please have a look, this is simple and low-risk improvement.
> Avoid scanning prior row state for uncovered local indexes on immutable
> tables.
> -------------------------------------------------------------------------------
>
> Key: PHOENIX-6115
> URL: https://issues.apache.org/jira/browse/PHOENIX-6115
> Project: Phoenix
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Major
> Fix For: 5.1.0, 4.16.0
>
> Attachments: 6115-master-v2.txt, 6115-master.txt
>
>
> Looking at the code I realized that we retrieve the prior row state even when
> is not necessary.
> Specifically it is not necessary when (a) the table is immutable and (b) the
> indexes does not include any covered columns.
> The unnecessary work is in part a consequence of the changes for global
> consistent indexing.
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