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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3335) Add BitComparator for filtering
Date Thu, 16 Dec 2010 07:03:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971983#action_12971983
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stack commented on HBASE-3335:
------------------------------

The patch looks great Nathanial (Minor which I can fix on commit is that we use two spaces
for tabs.. not 4 as you have in test).

Does this fancy new filter work for you?  (It might work in eclipse environment but in distributed
hbase it might not?)  You don't have to add it to HbaseObjectWritable?  (See this class for
what I mean).

Thanks.

> Add BitComparator for filtering
> -------------------------------
>
>                 Key: HBASE-3335
>                 URL: https://issues.apache.org/jira/browse/HBASE-3335
>             Project: HBase
>          Issue Type: Improvement
>          Components: client
>            Reporter: Nathaniel Cook
>            Priority: Minor
>         Attachments: HBASE-3335.patch, HBASE-3335.v2.patch
>
>   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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