使用otl，报错：mysql Commands out of sync; you can't run this command now

1、代码如下：

void TestCache(otl_connect& otlConn)
{
    try
    {
        char sql[1024] = {0};
        sprintf(sql,"call test1(1)");
        otl_stream stream(100, sql, otlConn,otl_implicit_select);

        int id;
        while(!stream.eof())
        {
            stream>>id;
            char sql2[1024] = {0};
            sprintf(sql2,"call test2(:Id<int>)");
            otl_stream stream2(100, sql2, otlConn,otl_implicit_select);
            stream2<<id;

            while(!stream2.eof())
            {
                int ff =0;
            }
        }
    }
    catch(otl_exception& ex)
    {
        printf("ExecuteSql Error, ErrorMsg[%s], Sql[%s]",
            ex.msg,
            ex.stm_text);
    }
}

2、执行otl_stream stream2(100, sql2, otlConn,otl_implicit_select);的时候出错，如下：

Commands out of sync; you can‘t run this command now
3、错误原因：mysql上一次的查询没有将结果集释放掉，又进行下一次的查询。
4、otl：在第一个stream读取期间，第二个stream使用了绑定变量，会导致上面的问题，不知道otl内部是怎么封装的。
5、解决办法：
a、第二个stream不使用绑定变量，如下：

void TestCache(otl_connect& otlConn)
{
    try
    {
        char sql[1024] = {0};
        sprintf(sql,"call test1(1)");
        otl_stream stream(100, sql, otlConn,otl_implicit_select);

        int id;
        while(!stream.eof())
        {
            stream>>id;
            char sql2[1024] = {0};
            sprintf(sql2,"call test2(%d)",id);
            otl_stream stream2(100, sql2, otlConn,otl_implicit_select);

            while(!stream2.eof())
            {
                int ff =0;
            }
        }
    }
    catch(otl_exception& ex)
    {
        printf("ExecuteSql Error, ErrorMsg[%s], Sql[%s]",
            ex.msg,
            ex.stm_text);
    }
}   

b、先把第一个stream读取完，再进行第二个stream，如下：

void TestCache(otl_connect& otlConn)
{
    try
    {
        char sql[1024] = {0};
        sprintf(sql,"call test1(1)");
        otl_stream stream(100, sql, otlConn,otl_implicit_select);

        vector<int> intVec;
        int id;
        while(!stream.eof())
        {
            stream>>id;
            intVec.push_back(id);
        }

        for(vector<int>::iterator iter = intVec.begin();
            iter != intVec.end(); ++iter)
        {
            char sql2[1024] = {0};
            sprintf(sql2,"call test2(:Id<int>)");
            otl_stream stream2(100, sql2, otlConn,otl_implicit_select);
            stream2<<id;

            while(!stream2.eof())
            {
                int ff =0;
            }
        }
    }
    catch(otl_exception& ex)
    {
        printf("ExecuteSql Error, ErrorMsg[%s], Sql[%s]",
            ex.msg,
            ex.stm_text);
    }
}

使用otl，报错：mysql Commands out of sync; you can't run this command now