jdbc access via c/jni

#include <printf.h>
#include <stdlib.h>
#include <zconf.h>
#include <sys/time.h>
#include "jdbcapi.h"
#include "jni.h"

int main() {
    JDBC_API *api = jdbcapi_create();
    bool ret = api->get_connection(api, "jdbc:h2:tcp://localhost/~/h2/test", "sa", "test");

    struct timeval tv1, tv2;
    gettimeofday(&tv1, NULL);

    for (int i = 0; i < 1000000; ++i) {
        bool ret2 = api->execute(api, "insert into test(id,name,field,f2) values(nextval('RESTART'),'from c','a','a')");
    }
    gettimeofday(&tv2, NULL);

    printf("Total time = %f seconds\n",
           (double) (tv2.tv_usec - tv1.tv_usec) / 1000000 +
           (double) (tv2.tv_sec - tv1.tv_sec));
}