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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13094) Consider Filters that are evaluated before deletes and see delete markers
Date Tue, 16 Aug 2016 17:16:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423087#comment-15423087
] 

Lars Hofhansl commented on HBASE-13094:
---------------------------------------

I'd like to warm this up again.
There are several ways to do this:
# Add a special Filter that can wrap any other filter. This filter would be evaluated before
the delete markers are checked. This needs to be the only Filter used.
# Variation of #1, which would allow to add this wrapper to a FilterList, then some logic
to evaluate the right parts before or after delete markers are handled.
# Add a new API to filter, in order to indicate whether this filter is to be evaluated before
or after delete markers.
# Add a new API to Scan and Get to allow adding a 2nd filter, that is evaluated before deletes.

#1 is simplest and can be done 100% backwards compatible. #4 seems cleanest. Comments?

[~stack], [~apurtell]

> Consider Filters that are evaluated before deletes and see delete markers
> -------------------------------------------------------------------------
>
>                 Key: HBASE-13094
>                 URL: https://issues.apache.org/jira/browse/HBASE-13094
>             Project: HBase
>          Issue Type: Brainstorming
>          Components: regionserver, Scanners
>            Reporter: Lars Hofhansl
>
> That would be good for full control filtering of all cells, such as needed for some transaction
implementations.
> [~ghelmling]



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