code: @SuppressWarnings("unchecked")
      public STMT columnWithCurrentTimestamp(final String _columnName)
      {
          this.columnWithSQLValues.add(
                  new AbstractSQLInsertUpdate.ColumnWithSQLValue(_columnName,
                                                                 Context.getDbType().getCurrentTimeStamp()));
          return (STMT) this;
      }
docs: Adds a new column which will have the current time stamp to append.
  
  @param _columnName   name of column to append for which current time
  stamp must be set
  @return this SQL update instance