adoquery.delete的用法 locktype 详解

 

偶尔看见的，可能将来会用到 这里保存下，将来有时间再整理下

?

基本上 , 把locktype 设置为ltBatchOptimistic可以帮到你.

 

不过你最好审视一下你的程序逻辑,为什么不可以在查询的时候就用条件过滤了不要的记录?

 

ltUnspecified A specific lock type has not been specified or determined.(未指定)

ltReadOnly Read-only; the current execution cannot modify data.(只读)

ltPessimistic Pessimistic locks; locks instantiated on a record-by-record basis when edit mode is applied to a record.(悲观锁定,当记录进入dsEdit状态就锁定数据库)

ltOptimistic Optimistic locks; locked are initiated on a record-by-record basis, but only when updates are applied and a record is being updated.(乐观锁定,只在提交的时候试图锁定记录)

ltBatchOptimistic Optimistic batch updates; used for batch update mode rather than immediate update mode.(对记录集的修改批量缓存,暂时不反映到数据库)