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https://issues.apache.org/jira/browse/PHOENIX-1015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393207#comment-14393207
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James Taylor commented on PHOENIX-1015:
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Sounds like a bug with local indexes as we have logic that doesn't preclude a
local index when some of the columns can't be found. That's what triggers the
join back to the data table. Sounds like something isn't working as expected.
> Support joining back to data table row from local index when query condition
> involves leading columns in local index
> --------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-1015
> URL: https://issues.apache.org/jira/browse/PHOENIX-1015
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: rajeshbabu
> Assignee: rajeshbabu
> Fix For: 5.0.0, 4.1.0
>
> Attachments: PHOENIX-1015.patch, PHOENIX-1015_v6.patch,
> PHOENIX-1015_v7.patch, PHOENIX-1015_v8.patch, PHOENIX-1015_v8.rar,
> PHOENIX-1015_v9.patch
>
>
> When a query involves more columns to project than columns in index and query
> condition involves leading columns in local index then first we can get
> matching rowkeys from local index table and then get the required columns
> from data table. In local index both data region and index region co-reside
> in the same RS, we can call get on data region to get the missing columns in
> the index, without any n/w overhead. So it's efficient.
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