Home Database Mysql Tutorial 使用存储过程时一个错误的解决方法_MySQL

使用存储过程时一个错误的解决方法_MySQL

Jun 01, 2016 pm 02:05 PM
use storage method solve process mistake

jackxm(原作)

这段时间用了一下C Builder ,在调用存储过程的时候遇到了一些问题,问了很多地方都没有找到答案,最后还是靠自己,现在拿出来和大家分享。

示例代码:

StoredProc1->Params->Clear();
StoredProc1->Params->CreateParam( ftSmallint, "@m1", ptInput);
StoredProc1->Params->CreateParam( ftString, "@m2", ptOutput);
StoredProc1->Params->CreateParam( ftInteger, "@m3", ptOutput);
StoredProc1->Params->CreateParam( ftInteger, "@m4", ptOutput);
StoredProc1->Params->CreateParam( ftInteger, "@m5", ptOutput);

StoredProc1->Params->CreateParam( ftInteger, "Result", ptResult);
StoredProc1->Prepare();
StoredProc1->ExecProc();


问题:调用存储过程的时候总是报错,注意,时在执行StoredProc1->ExecProc()的时候就会报错,其它的地方报的错误的解决方法不再本篇文章中。执行代码报错时的错误信息提示:错误:indicator variable required but not supplied

原因:当在执行的存储过程的时候,如果有一项出项空值的时候,就会发生这样的问题

解决:在存储过程中对产成的空值进行处理,就可以了

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