调用语句

--建表
openGauss=# CREATE SCHEMA hr;
openGauss=# SET CURRENT_SCHEMA = hr;
openGauss=# CREATE TABLE staffs 
(
  section_id INTEGER, 
  salary INTEGER
);
openGauss=# INSERT INTO staffs VALUES (30, 10);
openGauss=# INSERT INTO staffs VALUES (30, 20);

--创建存储过程proc_staffs
openGauss=# CREATE OR REPLACE PROCEDURE proc_staffs
(
section     NUMBER(6),
salary_sum out NUMBER(8,2),
staffs_count out INTEGER
)
IS
BEGIN
SELECT sum(salary), count(*) INTO salary_sum, staffs_count FROM hr.staffs where section_id = section;
END;
/

--创建存储过程proc_return.
openGauss=# CREATE OR REPLACE PROCEDURE proc_return
AS
v_num NUMBER(8,2);
v_sum INTEGER;
BEGIN
proc_staffs(30, v_sum, v_num);  --调用语句
dbe_output.print_line(v_sum||'#'||v_num);
RETURN;  --返回语句
END;
/

--调用存储过程proc_return.
openGauss=# CALL proc_staffs(2,8,6);

--清除存储过程
openGauss=# DROP PROCEDURE proc_staffs;
openGauss=# DROP PROCEDURE proc_return;

--创建函数func_return.
openGauss=# CREATE OR REPLACE FUNCTION func_return returns void
language plpgsql
AS $$
DECLARE
v_num INTEGER := 1;
BEGIN
dbe_output.print_line(v_num);
RETURN;  --返回语句
END $$;


-- 调用函数func_return
openGauss=#  CALL func_return();

-- 清除函数
openGauss=#  DROP FUNCTION func_return;

-- 清除当前数据库模式
openGauss=# DROP SCHEMA hr CASCADE;