Fwd: MultipleColumnPrefixFilter issues with SingleColumnValueFilter

[Vikash Agarwal <vi...@gmail.com>]

Hi Team,


Currently I am trying to use MultipleColumnPrefixFilter along with
SingleColumnValueFilter and the results  that I am getting seems to be
problematic.

I have an hbase table "test_messages" with column family  "main" and Column
Qualifiers as : "pa", "cs" ,"eps","cst","ver","nm","parl".
Assume all the row Keys of the table  has all the above columns.


Now When I am creating Filters as below:


FilterList temp=new FilterList(FilterList.Operator.MUST_PASS_ALL);

SingleColumnValueFilter filter1= new SingleColumnValueFilter("main"
,"pa",CompareFilter.CompareOp.LESS_OR_EQUAL, Bytes.toBytes("SomeValue"));
filter1 .setFilterIfMissing(true);

SingleColumnValueFilter filter2= new SingleColumnValueFilter("main"
,"cs",CompareFilter.CompareOp.EQUAL, Bytes.toBytes("SomeValue"));
filter2.setFilterIfMissing(true);


SingleColumnValueFilter filter3= new SingleColumnValueFilter("main"
,eps",CompareFilter.CompareOp.EQUAL, Bytes.toBytes("SomeValue"));
filter3.setFilterIfMissing(true);

Case 1:

MultipleColumnPrefixFilter cpfxf=new MultipleColumnPrefixFilter(new
byte[][]{ Bytes.toBytes("pa"),Bytes.toBytes("cs"),Bytes.toBytes("eps")});
temp.addFilter(cpfxf);

The above filters results in proper extratcion of data from Hbase.


Now if I create a MultipleColumnPrefixFilter  as below:

Case 2:
MultipleColumnPrefixFilter cpfxf=new MultipleColumnPrefixFilter(new
byte[][]{ Bytes.toBytes("pa"),Bytes.toBytes("eps")});        //Note "cs" is
removed
temp.addFilter(cpfxf);

I don't get any data

However if I create a filter as

Case 3:
MultipleColumnPrefixFilter cpfxf=new MultipleColumnPrefixFilter(new
byte[][]{ Bytes.toBytes("pa"),Bytes.toBytes("cs")});              // Note
"eps" is removed and "cs"  is added back.
temp.addFilter(cpfxf);

I get lot of data.


EIther both Case 2 and Case 3 should give data or none of them.
Can someone Explain me the reason for this to happen ? Or is there a bug in
MultipleColumnPrefixFilter .


Vikash Agarwal