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SQL Query Problem

From: Kristian Lance <kristian(dot)lance(at)crc(dot)ca>
To: pgsql-bugs(at)postgresql(dot)org
Subject: SQL Query Problem
Date: 2001-11-29 18:06:51
Message-ID: 5.1.0.14.2.20011128141019.01da6cc8@mail.crc.ca (view raw or flat)
Thread:
Lists: pgsql-bugs
The server is running:

PostgreSQL version 7.0.2
RedHat Linux 6.2

When using ORDER BY in an SQL statement where the data type is varchar and 
the data are unix directory paths, the forward slashes (/) are ignored, 
causing the results to be returned in the incorrect order.

Example:

Here is the INPUT:

/usr/local/data/x/d
/usr/local/data/xc/e
/usr/local/data/x/a
/usr/local/data/xc
/usr/local/data/x/b

Here is the QUERY:

SELECT * FROM mytable ORDER BY path

Here is the OUTPUT:

/usr/local/data/x/a
/usr/local/data/x/b
/usr/local/data/xc
/usr/local/data/xc/e
/usr/local/data/x/d

Note that the program appears to make no distinction between /x/c and 
/xc.  I could be wrong, but I believe that the output order should be as 
follows:

Here is the OUTPUT I expected:

/usr/local/data/x/a
/usr/local/data/x/b
/usr/local/data/x/d
/usr/local/data/xc
/usr/local/data/xc/e





----------

Kristian T. Lance
Database Application Developer (IS/Web)

Client Support Services
Information Networks and Systems

Communications Research Centre Canada
3701 Carling Avenue
Ottawa, ON  K2H 8S2

Tel.: (613) 991-6812   Fax: (613) 991-5795

http://www.crc.ca


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