另外，对于每种可能出现的异常的响应是不做任何事，但是CONTINUEHANDLER声明需要一个完整的sql语句；因此使用伪赋值。
Also, the response to each of the anticipated exceptions is to do nothing, but the CONTINUE HANDLER declaration expects a complete SQL statement; hence the dummy assignment.
赋值密度函数概率真度推理规则相似度伪距离。
Valuation density probability truth degree inference rule similarity degree pseudo-distance.
赋值密度函数概率真度推理规则相似度伪距离。
Valuation density probability truth degree inference rule similarity degree pseudo-distance.
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