Message-ID: <419F5A83.1040504@carvalhaes.net>
Date: Sat, 20 Nov 2004 14:53:55 +0000
From: Rodrigo Carvalhaes <grupos@carvalhaes.net>
Reply-To: grupos@carvalhaes.net
User-Agent: Mozilla Thunderbird 0.9 (X11/20041103)
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To: pgsql-sql@postgresql.org
Subject: How to get the max on a char column?
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Hi !

I am quite confused of the results on a SELECT max...

My environment:
Conectiva Linux 10, PostgreSQL 7.4.6 (compiled from the sources)

My problem is the "select max(id) FROM test" the result is 20 but the 
right is 1020. Is this a BUG or I am crazy ??

Cheers,

Rodrigo Carvalhaes

The SQL...

teste=# CREATE TABLE test ( id char(15), name char(80) );
CREATE TABLE
teste=# \d test
      Table "public.test"
Column |     Type      | Modifiers
--------+---------------+-----------
id          | character(15) |
name   | character(80) |

teste=# INSERT INTO test VALUES ( '10', 'luidgi');
INSERT 15303727 1
teste=# INSERT INTO test VALUES ( '20', 'luis');
INSERT 15303728 1
teste=# INSERT INTO test VALUES ( '1010', 'ruan');
INSERT 15303729 1
teste=# INSERT INTO test VALUES ( '1020', 'lion');
INSERT 15303730 1
teste=# SELECT * FROM test;
     id        |                                       name
-----------------+---------------------------------------------------------------------------------- 

10              | luidgi
20              | luis
1010            | ruan
1020            | lion
(4 rows)

teste=# SELECT max(id) FROM test;
max
-----
20
(1 row)

teste=# select max(id) FROM test;
max
-----
20
(1 row)


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