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From "Lars Hofhansl (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4612) Allow ColumnPrefixFilter to support multiple prefixes
Date Wed, 21 Mar 2012 19:23:40 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl resolved HBASE-4612.
----------------------------------

    Resolution: Won't Fix

I am closing this, because we already have MultipleColumnPrefixFilter.
Please reopen if I misunderstood.
                
> Allow ColumnPrefixFilter to support multiple prefixes
> -----------------------------------------------------
>
>                 Key: HBASE-4612
>                 URL: https://issues.apache.org/jira/browse/HBASE-4612
>             Project: HBase
>          Issue Type: Improvement
>          Components: filters
>    Affects Versions: 0.90.4
>            Reporter: Eran Kutner
>            Assignee: Eran Kutner
>            Priority: Minor
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4612-0.90.patch, HBASE-4612.patch
>
>
> When having a lot of columns grouped by name I've found that it would be very useful
to be able to scan them using multiple prefixes, allowing to fetch specific groups in one
scan, without fetching the entire row. This is impossible to achieve using a FilterList, so
I've added such support to the existing ColmnPrefixFilter while keeping backward compatibility.
> The attached patch is based on 0.90.4, I noticed that the 0.92 branch has a new method
to support instantiating filters using Thrift. I'm not sure how the serialization works there
so I didn't implement that, but the rest of my code should work in 0.92 as well.

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