The use of categories reinforces my previous recommendation: it limits the scope of changes to Object to the body of the use clause in the easyb DSL.
categories的使用加强了我之前的建议:它将对Object的修改范围限制为easyb dsl中use子句。
If so, it skips the validation process by using the WHEN clause in the trigger body.
如果已经执行了验证,那么在触发器代码体中使用when子句跳过验证过程。
Gets the length, in bytes, of the body of this exception-handling clause.
获取此异常处理子句的主体的长度(以字节为单位)。
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