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CREATE TABLE ttable1 OF nothing;
CREATE TYPE person_type AS (id int, name text);
CREATE TABLE persons OF person_type;
CREATE TABLE IF NOT EXISTS persons OF person_type;
SELECT * FROM persons;
\d persons
CREATE FUNCTION get_all_persons() RETURNS SETOF person_type
LANGUAGE SQL
AS $$
SELECT * FROM persons;
$$;
SELECT * FROM get_all_persons();
-- certain ALTER TABLE operations on typed tables are not allowed
ALTER TABLE persons ADD COLUMN comment text;
ALTER TABLE persons DROP COLUMN name;
ALTER TABLE persons RENAME COLUMN id TO num;
ALTER TABLE persons ALTER COLUMN name TYPE varchar;
CREATE TABLE stuff (id int);
ALTER TABLE persons INHERIT stuff;
CREATE TABLE personsx OF person_type (myname WITH OPTIONS NOT NULL); -- error
CREATE TABLE persons2 OF person_type (
id WITH OPTIONS PRIMARY KEY,
UNIQUE (name)
);
\d persons2
CREATE TABLE persons3 OF person_type (
PRIMARY KEY (id),
name WITH OPTIONS DEFAULT ''
);
\d persons3
CREATE TABLE persons4 OF person_type (
name WITH OPTIONS NOT NULL,
name WITH OPTIONS DEFAULT '' -- error, specified more than once
);
DROP TYPE person_type RESTRICT;
DROP TYPE person_type CASCADE;
CREATE TABLE persons5 OF stuff; -- only CREATE TYPE AS types may be used
DROP TABLE stuff;
-- implicit casting
CREATE TYPE person_type AS (id int, name text);
CREATE TABLE persons OF person_type;
INSERT INTO persons VALUES (1, 'test');
CREATE FUNCTION namelen(person_type) RETURNS int LANGUAGE SQL AS $$ SELECT length($1.name) $$;
SELECT id, namelen(persons) FROM persons;
CREATE TABLE persons2 OF person_type (
id WITH OPTIONS PRIMARY KEY,
UNIQUE (name)
);
\d persons2
CREATE TABLE persons3 OF person_type (
PRIMARY KEY (id),
name NOT NULL DEFAULT ''
);
\d persons3
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