[jira] Commented: (HBASE-1696) [stargate] support specification of filters for scanners

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-1696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12839125#action_12839125 ] 

Andrew Purtell commented on HBASE-1696:
---------------------------------------

Embed commons-jexl for expression parsing.

http://commons.apache.org/jexl/
http://mvnrepository.com/artifact/commons-jexl/commons-jexl/1.1

Also, as part of this work, upgrade Google protobufs from 2.1.0 to 2.3.0 since the Scanner message format needs to be touched. 

I have not looked into JEXL in much detail other than I know it's interface can be independent of JSP, unlike commons-el. I'm hoping it will help with things like constant folding. 

> [stargate] support specification of filters for scanners
> --------------------------------------------------------
>
>                 Key: HBASE-1696
>                 URL: https://issues.apache.org/jira/browse/HBASE-1696
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>             Fix For: 0.20.4, 0.21.0
>
>
> Add support for specifying filters for scanners. May require a little language for full expressability. 

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