我确定Out-Of-Memory错误的原因是循环期间str字符串太长.看来str字符串对您的测试没有用，它没有添加到响应中.

I'm sure the reason of Out-Of-Memoryerror is the str string is too long during your loop. It seems that the str string is useless for your test which is not added into response.

请删除它，示例存储过程将正常运行.

Please remove it and the sample stored procedure will work fine.