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https://issues.apache.org/jira/browse/PHOENIX-1038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14025474#comment-14025474
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James Taylor commented on PHOENIX-1038:
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[~rajesh23] - to test this patch, start Phoenix against 4.0. Then upgrade the
cluster to 4.1 and bring it up again. It should dynamically add the INDEX_TYPE
column on the first connection to the cluster.
> Dynamically add INDEX_TYPE column to SYSTEM.CATALOG if not already there
> ------------------------------------------------------------------------
>
> Key: PHOENIX-1038
> URL: https://issues.apache.org/jira/browse/PHOENIX-1038
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: rajeshbabu
> Assignee: rajeshbabu
> Attachments: PHOENIX-933.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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