code: @Override
      public void deleteByColumn(String schemaName, String tableName, String columnName, Object columnValue)
      {
  
          if (!isOpen())
          {
              throw new PersistenceException("PelopsClient is closed.");
          }
  
          RowDeletor rowDeletor = clientFactory.getRowDeletor(pool);
          rowDeletor.deleteRow(tableName,
                  Bytes.fromByteBuffer(CassandraUtilities.toBytes(columnValue, columnValue.getClass())),
                  getConsistencyLevel());
  
      }
docs: /*
  (non-Javadoc)
  
  @see com.impetus.kundera.client.Client#deleteByColumn(java.lang.String,
  java.lang.String, java.lang.String, java.lang.Object)