テスト用のテーブルの作成

create.sql

drop table in01;

create table in01 (id int primary key, operand1 int, operand2 int);
insert into in01 values (1,10,9);
insert into in01 values (2,20,8);
insert into in01 values (3,30,7);
insert into in01 values (4,40,6);
insert into in01 values (5,50,5);

drop table out01;
create table out01 (id int primary key, sum int, diff int);

実行

$ psql -U scott -d city < create.sql 
DROP TABLE
CREATE TABLE
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
DROP TABLE
CREATE TABLE

ストアドプロシージャの作成

sum_diff_proc.sql

drop procedure sum_diff_proc;

CREATE PROCEDURE sum_diff_proc(int) AS $$
DECLARE
ope1  int;
ope2  int;
BEGIN
SELECT operand1 INTO ope1 FROM in01 WHERE id = $1;
SELECT operand2 INTO ope2 FROM in01 WHERE id = $1;
INSERT INTO out01 VALUES ($1, ope1 + ope2, ope1 - ope2);
END;
$$
LANGUAGE plpgsql;

実行

$ psql -U scott -d city < sum_diff_proc.sql 
DROP PROCEDURE
CREATE PROCEDURE

ストアードプロシージャの実行

exec01.sql

select * from operand;

call sum_diff_proc(1);
call sum_diff_proc(2);
call sum_diff_proc(3);
call sum_diff_proc(4);
call sum_diff_proc(5);

select * from answer;

実行

$ psql -U scott -d city < exec01.sql 
 id | operand1 | operand2 
----+----------+----------
  1 |       10 |        9
  2 |       20 |        8
  3 |       30 |        7
  4 |       40 |        6
  5 |       50 |        5
(5 行)

CALL
CALL
CALL
CALL
CALL
 id | sum | diff 
----+-----+------
  1 |  19 |    1
  2 |  28 |   12
  3 |  37 |   23
  4 |  46 |   34
  5 |  55 |   45
(5 行)

確認したバージョン

PostgreSQL 14.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 12.1.1 20220730, 64-bit