[
https://issues.apache.org/jira/browse/PHOENIX-1560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14258652#comment-14258652
]
James Taylor commented on PHOENIX-1560:
---------------------------------------
We issue a Get from RS for local index join back to data table because we know
it's a local get. For this, the optimization that Maryann implemented for
PHOENIX-852 would be used which uses a skip scan (which is faster than a Get).
> Join between global index and data table if INDEX hint used
> -----------------------------------------------------------
>
> Key: PHOENIX-1560
> URL: https://issues.apache.org/jira/browse/PHOENIX-1560
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
>
> We already have an INDEX hint, and we already have a mechanism to collect
> referenced columns in the data table that are not in the index table (used
> only for local indexes currently). Instead of not using the global index when
> a referenced data column is not found in the index, we should rewrite the
> query to join back to the data table when the INDEX hint is present. This is
> always possible, as we always have the data PK columns in the index table,
> and our join optimization would kick in as well.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
