这意味着消息必须包含结构信息,以允许服务连接来自不同表的数据。
This means that the messages must contain the structural information to allow the service to join data from separate tables.
在处理函数中,我们获得了一个指向保存了位置信息的YYLTYPE结构的指针,这样可以生成一条很好的错误消息。
In the processing function, you get a pointer to the YYLTYPE structure holding the location, and you can generate a nice error message.
消息描述符由一种 MQMD 结构定义,这种结构包含大量提供消息信息的字段。
The message descriptor is defined by an MQMD structure that contains a number of fields that provide information about the message.
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