вторник, 26 августа 2014 г.

scan hbase with specific row

source: http://stackoverflow.com/questions/16849641/row-keys-through-the-hbase-shell

so if you want to find some row with specific word in it then
hbase(main):003:0> import org.apache.hadoop.hbase.filter.CompareFilter
hbase(main):005:0> import org.apache.hadoop.hbase.filter.SubstringComparator
hbase(main):006:0> scan 'test', {FILTER => org.apache.hadoop.hbase.filter.RowFilter.new(CompareFilter::CompareOp.valueOf('EQUAL'),SubstringComparator.new("word_by_which_you_want_to_search"))}

Also, http://stackoverflow.com/questions/11068418/get-filtered-rows-in-hbase
import org.apache.hadoop.hbase.filter.CompareFilter
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter
import org.apache.hadoop.hbase.filter.SubstringComparator
import org.apache.hadoop.hbase.util.Bytes

scan 'yourTable', {LIMIT => 10, FILTER => SingleColumnValueFilter.new(Bytes.toBytes('family'), Bytes.toBytes('field'), CompareFilter::CompareOp.valueOf('EQUAL'), Bytes.toBytes('AAA')), COLUMNS => 'family:field' }