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https://issues.apache.org/jira/browse/HBASE-5821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13257706#comment-13257706
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Hudson commented on HBASE-5821:
-------------------------------
Integrated in HBase-0.92 #378 (See
[https://builds.apache.org/job/HBase-0.92/378/])
HBASE-5821 Incorrect handling of null value in Coprocessor aggregation
function min() (Maryann Xue) (Revision 1328025)
Result = FAILURE
tedyu :
Files :
* /hbase/branches/0.92/CHANGES.txt
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/client/coprocessor/AggregationClient.java
*
/hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/coprocessor/AggregateImplementation.java
> Incorrect handling of null value in Coprocessor aggregation function min()
> --------------------------------------------------------------------------
>
> Key: HBASE-5821
> URL: https://issues.apache.org/jira/browse/HBASE-5821
> Project: HBase
> Issue Type: Bug
> Components: coprocessors
> Affects Versions: 0.92.1
> Reporter: Maryann Xue
> Assignee: Maryann Xue
> Fix For: 0.92.2, 0.96.0, 0.94.1
>
> Attachments: HBASE-5821.patch
>
>
> Both in AggregateImplementation and AggregationClient, the evaluation of the
> current minimum value is like:
> min = (min == null || ci.compare(result, min) < 0) ? result : min;
> The LongColumnInterpreter takes null value is treated as the least value,
> while the above expression takes min as the greater value when it is null.
> Thus, the real minimum value gets discarded if a null value comes later.
> max() could also be wrong if a different ColumnInterpreter other than
> LongColumnInterpreter treats null value differently (as the greatest).
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