|
postgres=# CREATE TABLE emp (
postgres(# name text,
postgres(# salary numeric,
postgres(# age integer,
postgres(# cubicle point
postgres(# );
CREATE TABLE
postgres=#
postgres=# insert into emp (salary) values(100);
INSERT 0 1
postgres=# insert into emp (salary) values(200);
INSERT 0 1
postgres=# insert into emp (salary) values(300);
INSERT 0 1
postgres=#
postgres=# CREATE FUNCTION double_salary(emp) RETURNS numeric AS $$
postgres$# SELECT $1.salary * 2 AS salary;
postgres$# $$ LANGUAGE SQL;
CREATE FUNCTION
postgres=#
postgres=# SELECT name, double_salary(ROW(name, salary*1.1, age, cubicle)) AS dream
postgres-# FROM emp;
name | dream
------+-------
| 220.0
| 440.0
| 660.0
(3 rows)
postgres=#
postgres=# drop function double_salary(emp);
DROP FUNCTION
postgres=# drop table emp;
DROP TABLE
postgres=#
postgres=#
|