调用语句

gaussdb=# DROP SCHEMA IF EXISTS hr CASCADE;
gaussdb=# CREATE SCHEMA hr;
gaussdb=# SET CURRENT_SCHEMA = hr;
gaussdb=# CREATE TABLE staffs 
(
  section_id NUMBER,
  first_name VARCHAR2,
  phone_number VARCHAR2, 
  salary NUMBER
  );
gaussdb=# INSERT INTO staffs VALUES (30, 'mike', '13567829252', 5800);
gaussdb=# INSERT INTO staffs VALUES (40, 'john', '17896354637', 4000);

--创建存储过程proc_staffs
gaussdb=# 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;
/
CREATE PROCEDURE
--创建存储过程proc_return.
gaussdb=# 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.
gaussdb=# CALL proc_return();
5800#1.00
 proc_return 
-------------

(1 row)

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

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

-- 调用函数func_return
gaussdb=# CALL func_return();
1
 func_return 
-------------

(1 row)

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