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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-5096) Local index region pruning is not working as expected.
Date Wed, 16 Jan 2019 17:41:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-5096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16744287#comment-16744287
] 

Lars Hofhansl commented on PHOENIX-5096:
----------------------------------------

Let's at least document the current behavior in detail somewhere, so that it is clear how
this needs to be setup.
Intersecting the key-ranges the way it is done has other advantages (pruning can happen on
a smaller granularity than regions, for example)


> Local index region pruning is not working as expected.
> ------------------------------------------------------
>
>                 Key: PHOENIX-5096
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5096
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Priority: Major
>
> The pruning of local indexes should do the following:
> * Use the local index
> * Reduce the number of regions based on filters on the table's primary key (i.e. WHERE
conditions including prefixes of the primary key)
> Instead it looks like in order for this to work the needed PK column need to be included
in the local index itself, changing the sort order of the local index.
> I'll provide some examples in the comments.
> [~giacomotaylor], [~tdsilva], [~vincentpoon], [~elserj], [~gjacoby]



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