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From "Nathaniel Cook (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3335) Add BitComparator for filtering
Date Fri, 10 Dec 2010 23:45:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12970340#action_12970340

Nathaniel Cook commented on HBASE-3335:

I have already written my implementation and will submit the patch here in a bit. Any suggestions
for  a different implementation?

> Add BitComparator for filtering
> -------------------------------
>                 Key: HBASE-3335
>                 URL: https://issues.apache.org/jira/browse/HBASE-3335
>             Project: HBase
>          Issue Type: Improvement
>          Components: client
>    Affects Versions: 0.89.20100924
>            Reporter: Nathaniel Cook
>            Priority: Minor
>   Original Estimate: 0h
>  Remaining Estimate: 0h
> There are many uses cases for setting bits flags and being able filter on those seems
like a good idea.
> The BitComparator would take a byte[] and a bitwise operator for its constructor. It
would perform the bitwise operation on the column value bytes with the specified byte[]. Then
return whether the result was non-zero. 
> Only the CompareOp.EQUAL and CompareOp.NOT_EQUAL would make sense with this comparator.
> The binary bitwise operators that apply  are AND, OR, and XOR. 

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