We add an extra integer column to the table for which optimistic locking is required; this holds a revision counter.
向要使用乐观锁定的表中添加一个额外的整数列;该列保存修订计数器。
2
By setting countercolumn, you specify to the builder to display the content of the guid column as a counter (starting at 1) rather than from the content of the field.
In the right column, counter each disadvantage with related advantages. If you cannot think of a related advantage, list how you can constructively minimize the impact of the disadvantage.