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Re: substring and POSIX re's

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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)

-- 
Michael Fuhr
http://www.fuhr.org/~mfuhr/

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