hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Dai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6805) Extend co-processor framework to provide observers for filter operations
Date Mon, 08 Oct 2012 08:02:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471441#comment-13471441
] 

Jason Dai commented on HBASE-6805:
----------------------------------

[~ghelmling] and [~apurtell] Thanks for the feedback. Wrapping a custom filter in preScannerOpen()
and preGet(), as Gary suggested, seems to be a viable alternative. We'll investigate if we
can implement DOT support using this approach.
                
> Extend co-processor framework to provide observers for filter operations
> ------------------------------------------------------------------------
>
>                 Key: HBASE-6805
>                 URL: https://issues.apache.org/jira/browse/HBASE-6805
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>    Affects Versions: 0.96.0
>            Reporter: Jason Dai
>         Attachments: extend_coprocessor.patch
>
>
> There are several filter operations (e.g., filterKeyValue, filterRow, transform, etc.)
at the region server side that either exclude KVs from the returned results, or transform
the returned KV. We need to provide observers (e.g., preFilterKeyValue and postFilterKeyValue)
for these operations in the same way as the observers for other data access operations (e.g.,
preGet and postGet). This extension is needed to support DOT (e.g., extracting individual
fields from the document in the observers before passing them to the related filter operations)


--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message