hallo?

mysql 작업 시 query를 날려 getResultSet()하였을 때

resultSet이 empty인 것을 확인하기 위한 방법

boolean empty = true;

while(rSet.next()){

...

empty = false;

}

if(empty) { ... }

출처: http://stackoverflow.com/questions/588307/c-obtaining-milliseconds-time-on-linux-clock-doesnt-seem-to-work-properl

#include <sys/time.h>
#include <ctime>

#include <stdio.h>
#include <unistd.h>
int main()
{
    struct timeval start, end;

    long mtime, seconds, useconds;    

    gettimeofday(&start, NULL);
    usleep(2000);
    gettimeofday(&end, NULL);

    seconds  = end.tv_sec  - start.tv_sec;
    useconds = end.tv_usec - start.tv_usec;

    mtime = ((seconds) * 1000 + useconds/1000.0) + 0.5;

    printf("Elapsed time: %ld milliseconds\n", mtime);

    return 0;
}

$ g++ -I /usr/local/include/mysql++/ -I /usr/local/mysql/include/ -L /usr/local/lib/ -L /usr/local/mysql/lib -lmysqlpp <fileName>