BUG #1590: Comparison Operation with Strings

The following bug has been logged online:

Bug reference: 1590
Logged by: Michaela
Email address: rambo1503-postgresql(at)yahoo(dot)de
PostgreSQL version: 8.0.1
Operating system: SuSE Linux 9.1
Description: Comparison Operation with Strings
Details:

Hello!

conditions:
-----------
Our database is defined with SQL_ASCII. We also tested Latin1.

CREATE TABLE test(feld varchar(100))
INSERT INTO test VALUES ('ABC');
INSERT INTO test VALUES ('?');
INSERT INTO test VALUES ('100');
INSERT INTO test VALUES ('B');
INSERT INTO test VALUES ('? ABC');
INSERT INTO test VALUES ('Z');

We want to use e.g. the following conditions:

1.example
---------
select * from test where field>='?' and field<'A'

result:
?
100

But it doesn`t find the '? ABC'. And '100' is wrong.

This command should give me this output:
?
? ABC

2.example
---------
select * from test where feld>='?' and feld<'@'

result:
?

It doesn`t find the '? ABC'.

This command should give me this output:
?
? ABC

3.example
---------
select * from test where feld>='A' and feld<'C'

result:
ABC
B
? ABC

the correct result would be:
ABC
B

We tested it with PostgreSQL version 7.2.1. There it works.

Kind Regards
Michaela