[jira] Commented: (HBASE-1831) Scanning API must be reworked to allow for fully functional Filters client-side

["Jonathan Gray (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758581#action_12758581 ] 

Jonathan Gray commented on HBASE-1831:
--------------------------------------

Filters should not be run on the client-side at all.

Server needs to be able to tell whether Scan should continue to the next region or not.

> Scanning API must be reworked to allow for fully functional Filters client-side
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-1831
>                 URL: https://issues.apache.org/jira/browse/HBASE-1831
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>            Priority: Critical
>             Fix For: 0.20.1, 0.21.0
>
>
> Right now, a client replays part of the Filter locally by calling filterRowKey() and filterAllRemaining() to determine whether it should continue to the next region.
> A number of new filters rely on filterKeyValue() and other calls to alter state.  It's also a false assumption that all rows/keys affecting a filter returning true for FAR will be seen client-side (what about those that failed the filter).
> This issue is about dealing with Filters properly from the client-side.

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