Fast mode requires explicit variable declarations.
快速模式要求显示声明变量。
There is no explicit variable for the message instance in the code; it is inferred.
在代码中没有为消息实体做显式变量声明;它是被推断出来的。
This means that only global variables in the SQL path that were defined before the last explicit bind time stamp are considered for global variable name resolution.
这意味着,在SQL路径中,只有在最后一次显式绑定时间戳之前定义的全局变量才会进行名称解析。
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