PostgreSQL基础整理（二）

存储过程

实现功能：针对工资表30岁以下，工资提升10% 30至40提升20% 40以上提升30% + 奖金（入参）返回平均薪酬

• 创建表：

DROP TABLE emps;

CREATE TABLE emps(userid int PRIMARY KEY, age int, salary numeric );

INSERT INTO emps VALUES(10, 25, 1000.0),(11, 26, 1500.0),(12, 27, 1300.0),(13, 35, 3000.0), (14, 45, 4000.0);

• 创建存储过程：

    DROP FUNCTION IF EXISTS add_salary(_bonus numeric );

    CREATE OR REPLACE FUNCTION add_salary(_bonus numeric )

    RETURNS numeric AS $body$

    

    DECLARE

        level1 numeric  := 30;

        level2 numeric  :=40;

        res numeric  := 0;

        page int;

        puserid int;

        mycursor refcursor ;

         

    

        BEGIN

            OPEN mycursor FOR SELECT userid, age FROM emps; 

            FETCH mycursor INTO puserid, page;

            RAISE NOTICE 'age is :----%',puserid||','||page;

            WHILE FOUND LOOP

                IF  page <= level1 

                THEN

                    UPDATE emps SET salary = salary * 1.1 WHERE userid = puserid;

                ELSIF  page > level1 AND page <= level2 

                THEN

                    UPDATE emps SET salary = salary*1.2 WHERE userid = puserid;

                ELSE

                    UPDATE emps SET salary = salary*1.3 WHERE userid = puserid;

                END IF;        

                

                FETCH mycursor INTO puserid, page;

                

            END LOOP;

            

                SELECT AVG(SALARY) FROM emps INTO res;

                RETURN res;

        END

    $body$

    Language plpgsql;

• 执行结果