"unknown column in field list" 将自定义字符串传递到 MariaDB/MySQL C 连接器 API 函数时出错

Question

我正在尝试制作一个功能，要求用户输入新的用户名和密码，然后将其存储在 MySQL/MariaDB 数据库中。我使用 strcat_s() 和 strcpy_s() 将字符串连接在一起，然后在 C API 中作为 MySQL/MariaDB 查询传递。但是，结果是 Unkown column 'foo' in 'field list' 错误。我该如何解决这个错误？下面是我的代码。

void NEW_PLAYER(MYSQL *con)
{
    const char  *NAME = "foo";
    const char *PASSWORD = "bar";
    char ch = NULL;
    unsigned int i = 0;
    printf("%s\n", NAME);
    printf("%s\n", PASSWORD);
    char TEMP[150];
    char str1[] = "INSERT INTO PLAYERS VALUES(";
    strcpy_s(TEMP, str1);
    strcat_s(TEMP, NAME);
    strcat_s(TEMP, ", ");
    strcat_s(TEMP, PASSWORD);
    strcat_s(TEMP, " ,0, 0, 0, 0)");
    printf("%s", TEMP);
    // inserting null character at end
    if (mysql_query(con, TEMP)) {
        fprintf(stderr, "%s\n", mysql_error(con));
        exit(-1);
    }
}

Here are my results from this code

Answer 1

字符串必须是引号，所以你必须像这样引用 'foo' 和 'bar':

const char  *NAME = "'foo'";
const char *PASSWORD = "'bar'";

"unknown column in field list" 将自定义字符串传递到 MariaDB/MySQL C 连接器 API 函数时出错

"unknown column in field list" error when passing custom string into MariaDB/MySQL C connector API function

c

mysql

database

c-strings

mariadb