简单的例子比如典型的名称唯一性约束、类型检查或非空检查。

Simple examples include the typical name-uniqueness constraints, type checks or non-nullness.

youdao

在这个例程中，首先检查是否有非空的上下文句柄。

Within this routine, first a check for non-null context handle is made.

youdao

注：远程语句在内部使用一些附加逻辑来检查空结果集。

Note: The remote statement has some additional logic that is used internally to check for empty result sets.

youdao