Re: substring and POSIX re's

Michael Fuhr wrote:

>On Tue, Apr 19, 2005 at 12:39:52PM -0400, Alvaro Herrera wrote:
>
>
>>On Tue, Apr 19, 2005 at 10:03:45AM -0600, Michael Fuhr wrote:
>>
>>
>>>On Tue, Apr 19, 2005 at 11:17:46AM -0500, Don Isgitt wrote:
>>>
>>>
>>>>Thanks, Tom. Interestingly enough, neither my original query or your
>>>>corrected one returns anything with pg 7.4--another good reason to
>>>>upgrade to 8.*
>>>>
>>>>
>>>Hmmm...for me both queries give the results shown if I run them in
>>>7.3.9, 7.4.7, 8.0.2, or 8.1devel.  What's different about your 7.4
>>>installation?
>>>
>>>
>>Maybe the regex_flavor setting?  (not sure of the exact name)
>>
>>
>
>Ah yes, I forgot about that....
>
>test=> SET regex_flavor TO basic;
>SET
>test=> SELECT substring('NE NE SE 2310 FSL 330 FEL' FROM '^(([A-Z][A-Z] )+)');
> substring
>-----------
>
>(1 row)
>
>test=> SET regex_flavor TO advanced;
>SET
>test=> SELECT substring('NE NE SE 2310 FSL 330 FEL' FROM '^(([A-Z][A-Z] )+)');
> substring
>-----------
> NE NE SE
>(1 row)
>
>test=> SELECT version();
>                                  version
>---------------------------------------------------------------------------
> PostgreSQL 7.4.7 on sparc-sun-solaris2.9, compiled by GCC gcc (GCC) 3.4.2
>(1 row)
>
>
>
Thank you, Alvaro and Michael,

The regex_flavor setting was the culprit; I never knew of such a
creature in pg! Mystery solved. The members on this board are great.

Don