Hello, Yes, look at Scan and Get APIs, both of which allow you to add Columns (Family and Qualifier both) to them.
Scan: http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Scan.html Get: http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Get.html For instance, on the HBase shell, you can do this as: hbase(main):002:0> create 'test', 'a', 'b', 'c', 'd' hbase(main):003:0> put 'test', 'r1', 'a:x', 'x' hbase(main):004:0> put 'test', 'r1', 'b:x', 'x' hbase(main):005:0> put 'test', 'r1', 'c:x', 'x' hbase(main):006:0> put 'test', 'r1', 'd:x', 'x' hbase(main):007:0> put 'test', 'r2', 'd:y', 'y' hbase(main):008:0> put 'test', 'r2', 'c:y', 'y' hbase(main):009:0> put 'test', 'r2', 'b:y', 'y' hbase(main):010:0> put 'test', 'r2', 'a:y', 'y' hbase(main):011:0> scan 'test', {COLUMNS => ['a', 'c']} ROW COLUMN+CELL r1 column=a:x, timestamp=1331358809297, value=x r1 column=c:x, timestamp=1331358815490, value=x r2 column=a:y, timestamp=1331358841888, value=y r2 column=c:y, timestamp=1331358836407, value=y hbase(main):012:0> get 'test', 'r1', {COLUMNS => ['a', 'c']} COLUMN CELL a:x timestamp=1331358809297, value=x c:x timestamp=1331358815490, value=x Do: help 'dml' for more docs from the HBase shell. On Sat, Mar 10, 2012 at 4:29 AM, newbie24 <[email protected]> wrote: > > Hi, > > Can someone please answer this question . > > I have a column family say A,B,C D > can I use just a partial of the column family to retrieve the data.Using the > above example can my startrow combine values of column A abd B to retrieve > a row from hbase. > > > Not sure If I'm clear with my question. > > Thanks > > -- > View this message in context: > http://old.nabble.com/question-in-retrieving-data-from-hbase-tp33475136p33475136.html > Sent from the HBase User mailing list archive at Nabble.com. > -- Harsh J
