From: Aaron Bono <postgresql@aranya.com>
To: Rodrigo De Leon <rdeleonp@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: SELECT substring with regex
Date: Fri, 7 Jul 2006 14:45:51 -0500
Message-ID: <bf05e51c0607071245w3738e109l8128d345f5b06977@mail.gmail.com> (raw)
In-Reply-To: <a55915760607071137q2c70346cp5b30cac14beaf1e7@mail.gmail.com>
References: <44AE66E0.1040606@numerixtechnology.de>
<200607071659.14940.gary.stainburn@ringways.co.uk>
<44AE9B4F.1020401@numerixtechnology.de>
<a55915760607071137q2c70346cp5b30cac14beaf1e7@mail.gmail.com>
On 7/7/06, Rodrigo De Leon <rdeleonp@gmail.com> wrote:
>
> On 7/7/06, T E Schmitz <mailreg@numerixtechnology.de> wrote:
> > But that takes me to the next problem:
> >
> > For the sake of the example I simplified the regular pattern.
> > In reality, BASE_NAME might be:
> >
> > 28mm
> > 28-70mm
> >
> > So the reg. expr. requires brackets:
> >
> > substring (NAME, '^(\\d+(-\\d+)?mm)' ) as BASE_NAME
> >
> > Actually, the pattern is more complex than that and I cannot see how I
> > can express it without brackets.
>
> Maybe:
>
> select
> substring ('150mm LD AD Asp XR Macro', '^[\\d-]*mm' ) as BASE_NAME
> , substring('150mm LD AD Asp XR Macro','^[\\d-]*mm (.*)$') as SUFFIX;
>
> select
> substring ('28-70mm LD AD Asp XR Macro', '^[\\d-]*mm' ) as BASE_NAME
> , substring('28-70mm LD AD Asp XR Macro','^[\\d-]*mm (.*)$') as SUFFIX;
>
> etc...
>
> Regards,
>
> Rodrigo
Is there a reason this column wasn't separated into two different columns?
Or perhaps into a child table if there could be more than one XXXmm value in
the field?
Just curious.
-Aaron
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To: pgsql-sql@postgresql.org
Cc: postgresql@aranya.com, rdeleonp@gmail.com
Subject: Re: SELECT substring with regex
In-Reply-To: <bf05e51c0607071245w3738e109l8128d345f5b06977@mail.gmail.com>
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