【YashanDB知识库】MySQL返回结果集的存储过程的改写方法

DELIMITER $$

CREATE PROCEDURE proc1(p_start int, p_end int)

begin

    select 1 c1, 'name1' c2

    union all

    select 2, 'name2'

    union all

    select 3, 'name3'

    union all

    select 4, 'name4';

end $$

DELIMITER ;

mysql> call proc1(1,2);

+----+-------+

| c1 | c2 |

+----+-------+

| 1 | name1 |

| 2 | name2 |

| 3 | name3 |

| 4 | name4 |

+----+-------+

4 rows in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

CallableStatement callableStatement = conn.prepareCall("CALL PROC1(?,?)");

callableStatement.setInt(1, 1);

callableStatement.setInt(2, 10);

ResultSet rs = callableStatement.executeQuery();

while (rs.next()){

    String c2 = rs.getString("c2");

    System.out.println(c2);

}

CREATE OR REPLACE FUNCTION proc1(p_start number, p_end number) RETURN sys_refcursor as

    cur sys_refcursor;

begin

    OPEN cur FOR

        select 1 c1, 'name1' c2 from dual

            union all

        select 2, 'name2' from dual

            union all

        select 3, 'name3' from dual

            union all

        select 4, 'name4' from dual;

    RETURN cur;

end;

/

CallableStatement callableStatement = conn.prepareCall("{? = call FUNC1(?,?)}");

callableStatement.registerOutParameter(1, Types.REF_CURSOR);

callableStatement.setInt(2, 1);

callableStatement.setInt(3, 10);

callableStatement.execute();

ResultSet rs = (ResultSet) callableStatement.getObject(1);

while (rs.next()){

    String c2 = rs.getString("c2");

    System.out.println(c2);

}