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);
temp.addFilter(filter1);
temp.addFilter(filter2);
temp.addFilter(filter3);
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:
Consider we have filter1,2,3 and below filter
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:
Consider we have filter1,2,3 and below filter
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 .
Hbase Version: 1.2.0
--
Vikash Agarwal
