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https://issues.apache.org/jira/browse/HBASE-10836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948993#comment-13948993
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Chaitanya Kumar commented on HBASE-10836:
-----------------------------------------
Thanks for the guidance.
I will try to use these suggestions.
> Filters failing to compare negative numbers (int,float,double or long)
> ----------------------------------------------------------------------
>
> Key: HBASE-10836
> URL: https://issues.apache.org/jira/browse/HBASE-10836
> Project: HBase
> Issue Type: Brainstorming
> Components: Filters
> Affects Versions: 0.94.2
> Environment: Psuedo-mode
> Reporter: Chaitanya Kumar
> Labels: features
>
> I have come across an issue while using filters to get a result.
> For eg.
> I have created a table and its specifications are as follows :
> table name --> test
> column family --> cf
> row keys --> rowKey1 - rowKey10 (10 different row keys)
> column qualifier --> integerData
> For different rowkeys, the qualifier 'integerData' contains either positive
> or negative integer values (data loaded randomly).
> Now, while I am trying to retrieve the data from the table based on a filter
> condition, its failing to give the desired result.
> For eg. say,
> My table contains following data :
> [-50,-40,-30,-20,-10,10,20,30,40,50]
> I want to get only those values which are greater than or equal to 40.
> Following is the code for the filter set on scan :
> ********************************************
> Scan scan = new Scan();
> scan.addColumn(Bytes.toBytes("cf"), Bytes.toBytes(" integerData"));
>
> int i = 40;
> Filter filter = new ValueFilter(CompareOp.GREATER_OR_EQUAL,new
> BinaryComparator(Bytes.toBytes(i)));
> scan.setFilter(filter);
> *********************************************
> The result should be : 40 and 50
> BUT, the actual result is : -50, -40, -30, -20, -10, 40, 50
> I have read few posts which addressed this issue, and few people provided the
> solution as:
> 1) write a custom comparator, as BinaryComparator is not meant for number
> comparison
> OR
> 2) retrieve all the values as integer and then compare
> BUT, I want to know if there is any other way to achieve this.
> Because this seems to be a very basic need, i.e. comparing numbers, and I
> feel HBase should have something straight forward to deal with this.
> This comparison fails only when the negative numbers are involved.
> I am not able to get the right way to do it.
> My Hbase version is 0.94.2 and I am running it in pseudo mode.
> Can anyone help me on this ?
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