hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10789) Add NumberComparator
Date Thu, 20 Mar 2014 17:54:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13942047#comment-13942047
] 

Nick Dimiduk commented on HBASE-10789:
--------------------------------------

Have a look at the [DataType|http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/types/DataType.html]
API. I think we could provide a DataTypeComparator that took into account the presence of
[isOrderPreserving|http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/types/DataType.html#isOrderPreserving()].
For implementations that are order preserving, it can do full ordering efficiently. Of course,
if the type isn't order preserving, it could deserialize the values and compare them natively.

> Add NumberComparator
> --------------------
>
>                 Key: HBASE-10789
>                 URL: https://issues.apache.org/jira/browse/HBASE-10789
>             Project: HBase
>          Issue Type: Improvement
>          Components: Filters
>            Reporter: haosdent
>            Assignee: haosdent
>
> Sometimes user may want to filter out which value less than a positive number. But they
finally would get a result contains negative number.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message