code: public void deleteByColumn(String schemaName, String tableName, String columnName, Object columnValue)
      {
          try
          {
              handler.deleteRow(columnValue, schemaName, tableName);
              KunderaCoreUtils.printQuery("Delete data from " + tableName + " for PK " + columnValue, showQuery);
          }
          catch (IOException ioex)
          {
              log.error("Error during get columns by key. Caused by: .", ioex);
              throw new PersistenceException(ioex);
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.impetus.kundera.client.Client#deleteByColumn(java.lang.String,
  java.lang.String, java.lang.String, java.lang.Object)