使用 libpq 组织 PostgreSQL 数据库连接参数?
organize the PostgreSQL database connection parameters using libpq?
我正在尝试找出将数据库连接参数传递给此 libpq 连接控制函数的正确方法。
PQconnectdbParams
PGconn *PQconnectdbParams(const char * const *keywords,
const char * const *values, int expand_dbname);
This function opens a new database connection using the parameters taken from two NULL-terminated arrays. The first, keywords, is defined as an array of strings, each one being a key word. The second, values, gives the value for each key word.
我从来没有在实践中使用过这个函数(因为 PQconnectdb()
看起来更简单),但我认为这个例子应该有效:
char *keywords[] = {"hostaddr", "port", "dbname", 0};
char *values[] = {"127.0.0.1", "5432", "testdb", 0};
conn = PQconnectdbParams((const char **)keywords, (const char **)values, 0);
我正在尝试找出将数据库连接参数传递给此 libpq 连接控制函数的正确方法。
PQconnectdbParams
PGconn *PQconnectdbParams(const char * const *keywords,
const char * const *values, int expand_dbname);
This function opens a new database connection using the parameters taken from two NULL-terminated arrays. The first, keywords, is defined as an array of strings, each one being a key word. The second, values, gives the value for each key word.
我从来没有在实践中使用过这个函数(因为 PQconnectdb()
看起来更简单),但我认为这个例子应该有效:
char *keywords[] = {"hostaddr", "port", "dbname", 0};
char *values[] = {"127.0.0.1", "5432", "testdb", 0};
conn = PQconnectdbParams((const char **)keywords, (const char **)values, 0);