--- Debian version type and operators                                -*- sql -*-
---
--- Copyright © 2008 Roger Leigh <rleigh@debian.org>
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 2 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful, but
--- WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
--- General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see
--- <http://www.gnu.org/licenses/>.
CREATE EXTENSION debversion;
SET client_min_messages = warning; -- suppress "pkey created" message
CREATE TABLE versions (
  ver debversion
    CONSTRAINT versions_pkey PRIMARY KEY
);
RESET client_min_messages;
INSERT INTO versions (ver) VALUES ('4.1.5-2');
INSERT INTO versions (ver) VALUES ('4.0.2-1');
INSERT INTO versions (ver) VALUES ('4.1.4-1');
INSERT INTO versions (ver) VALUES ('4.1.5-1');
INSERT INTO versions (ver) VALUES ('4.2.0-1');
INSERT INTO versions (ver) VALUES ('4.1.4-2');
INSERT INTO versions (ver) VALUES ('4.1.5-2.01');
INSERT INTO versions (ver) VALUES ('4.1.99-a2-1');
INSERT INTO versions (ver) VALUES ('5.2.1-2');
INSERT INTO versions (ver) VALUES ('5.0.0-3');
INSERT INTO versions (ver) VALUES ('5.1.98.2-2');
INSERT INTO versions (ver) VALUES ('3.1.4-1');
INSERT INTO versions (ver) VALUES ('5.2.3-1');
INSERT INTO versions (ver) VALUES ('0:5.2.2-1');
INSERT INTO versions (ver) VALUES ('0:5.2.4-1');
INSERT INTO versions (ver) VALUES ('1:3.2.3-1');
SELECT * FROM versions ORDER BY ver;
     ver     
-------------
 3.1.4-1
 4.0.2-1
 4.1.4-1
 4.1.4-2
 4.1.5-1
 4.1.5-2
 4.1.5-2.01
 4.1.99-a2-1
 4.2.0-1
 5.0.0-3
 5.1.98.2-2
 5.2.1-2
 0:5.2.2-1
 5.2.3-1
 0:5.2.4-1
 1:3.2.3-1
(16 rows)

SELECT min(ver) FROM versions;
   min   
---------
 3.1.4-1
(1 row)

SELECT max(ver) FROM versions;
    max    
-----------
 1:3.2.3-1
(1 row)

-- PK violations
INSERT INTO versions (ver) VALUES ('0:4.1.5-2');
ERROR:  duplicate key value violates unique constraint "versions_pkey"
DETAIL:  Key (ver)=(0:4.1.5-2) already exists.
INSERT INTO versions (ver) VALUES ('04.1.5-2');
ERROR:  duplicate key value violates unique constraint "versions_pkey"
DETAIL:  Key (ver)=(04.1.5-2) already exists.
INSERT INTO versions (ver) VALUES ('4.01.5-2');
ERROR:  duplicate key value violates unique constraint "versions_pkey"
DETAIL:  Key (ver)=(4.01.5-2) already exists.
INSERT INTO versions (ver) VALUES ('4.1.05-2');
ERROR:  duplicate key value violates unique constraint "versions_pkey"
DETAIL:  Key (ver)=(4.1.05-2) already exists.
INSERT INTO versions (ver) VALUES ('4.1.5-02');
ERROR:  duplicate key value violates unique constraint "versions_pkey"
DETAIL:  Key (ver)=(4.1.5-02) already exists.