DISCONNECT

DISCONNECT —终止数据库连接

Synopsis

DISCONNECT connection_name
DISCONNECT [ CURRENT ]
DISCONNECT DEFAULT
DISCONNECT ALL

Description

DISCONNECT关闭与数据库的连接(或所有连接)。

Parameters

• connection_name

  • CONNECT命令构建的数据库连接名称。

• CURRENT

  • 关闭“当前”连接，该连接要么是最近打开的连接，要么是由SET CONNECTION命令设置的连接。如果未为DISCONNECT命令提供参数，这也是默认设置。

• DEFAULT

  • 关闭默认连接。

• ALL

  • 关闭所有打开的连接。

Examples

int
main(void)
{
    EXEC SQL CONNECT TO testdb AS DEFAULT USER testuser;
    EXEC SQL CONNECT TO testdb AS con1 USER testuser;
    EXEC SQL CONNECT TO testdb AS con2 USER testuser;
    EXEC SQL CONNECT TO testdb AS con3 USER testuser;

    EXEC SQL DISCONNECT CURRENT;  /* close con3          */
    EXEC SQL DISCONNECT DEFAULT;  /* close DEFAULT       */
    EXEC SQL DISCONNECT ALL;      /* close con2 and con1 */

    return 0;
}

Compatibility

在 SQL 标准中指定了DISCONNECT。

See Also

CONNECT, SET CONNECTION