Re: substring syntax with regexp

On Wed, 30 Jun 2004 08:45:18 -0500, joseph speigle <joe(dot)speigle(at)jklh(dot)us> wrote:
> hi,
>
> Does anybody know offhand what is the correct way to use substr to extract the domain name from a client_referer column as logged by mod_pgsqllog (httpd module), by correcting the following:
>
> the file 'hostname.sql' is pl/pgsql
>
> main=> \e hostname.sql
> ERROR: syntax error at or near "http" at character 290
> LINE 13: newuri = substr(tempuri from 'http://[^/]*/.*');

You have several immediate problems with this line:
- your regex should be double-quoted;
- the relevant function is "substring", not "substr";
- the regex pattern you want is probably more like :
'http://([^/]*)/', e.g.

test=> select substring('http://www.example.com/dir/file.html' from
'http://([^/]*)');
substring
-------------
www.example.com
(1 row)

HTH

Ian Barwick