Обсуждение: Character type name?? How to lower case it?

I have this script:
      SELECT a.attname, t.typname, a.attlen
        FROM pg_class c, pg_attribute a, pg_type t
          WHERE c.relname = 'regis' and a.attname in
('var1','var2',var3');

but a.attname is of type name, inwhich text(..) or lower(..)
do not work with this type and I do not seem to be able to
convert type name to text....

Can someone help me get around this?

Thanks
--
Cheers

Douglas Nichols
dnichols@fhcrc.org
----------------------------------------------------------------------------
Fred Hutchinson Cancer Research Center

>
> I have this script:
>       SELECT a.attname, t.typname, a.attlen
>         FROM pg_class c, pg_attribute a, pg_type t
>           WHERE c.relname = 'regis' and a.attname in
> ('var1','var2',var3');
>
> but a.attname is of type name, inwhich text(..) or lower(..)
> do not work with this type and I do not seem to be able to
> convert type name to text....
>
> Can someone help me get around this?
>

You could use case-insensitive regex operator - Your query should looks
like following:
    SELECT a.attname, t.typname, a.attlen
        FROM pg_class c, pg_attribute a, pg_type t
        WHERE c.relname = 'regis' and (a.attname ~*'var1' OR
a.attname~*'var2' OR a.attname~*'var3');
May be this helps
    Rem
-------------------------------------------------------------------*------------
Remigiusz Sokolowski      e-mail: rems@gdansk.sprint.pl           * *
-----------------------------------------------------------------*****----------

Moin!

On Fri, 29 Jan 1999 09:43:33 +0100 (MET)
    Remigiusz Sokolowski <rems@gdansk.sprint.pl> wrote:
> >
> > I have this script:
> >       SELECT a.attname, t.typname, a.attlen
> >         FROM pg_class c, pg_attribute a, pg_type t
> >           WHERE c.relname = 'regis' and a.attname in
> > ('var1','var2',var3');
> >
> > but a.attname is of type name, inwhich text(..) or lower(..)
> > do not work with this type and I do not seem to be able to
> > convert type name to text....
> >
> > Can someone help me get around this?
> >
>
> You could use case-insensitive regex operator - Your query should looks
> like following:
>     SELECT a.attname, t.typname, a.attlen
>         FROM pg_class c, pg_attribute a, pg_type t
>         WHERE c.relname = 'regis' and (a.attname ~*'var1' OR
> a.attname~*'var2' OR a.attname~*'var3');

Why not
[...]
  WHERE c.relname = 'regis' and a.attname ~* 'var[1-3]'
[...]

It's a regex, remember?
The OR isn't necessary.

HIH
 &
HAND
  Guido
--
Monday is an awful way to spend 1/7th of your life.

> Moin!
>
> On Fri, 29 Jan 1999 09:43:33 +0100 (MET)
>     Remigiusz Sokolowski <rems@gdansk.sprint.pl> wrote:
> > >
> > > I have this script:
> > >       SELECT a.attname, t.typname, a.attlen
> > >         FROM pg_class c, pg_attribute a, pg_type t
> > >           WHERE c.relname = 'regis' and a.attname in
> > > ('var1','var2',var3');
> > >
> > > but a.attname is of type name, inwhich text(..) or lower(..)
> > > do not work with this type and I do not seem to be able to
> > > convert type name to text....
> > >
> > > Can someone help me get around this?
> > >
> >
> > You could use case-insensitive regex operator - Your query should looks
> > like following:
> >     SELECT a.attname, t.typname, a.attlen
> >         FROM pg_class c, pg_attribute a, pg_type t
> >         WHERE c.relname = 'regis' and (a.attname ~*'var1' OR
> > a.attname~*'var2' OR a.attname~*'var3');
>
> Why not
> [...]
>   WHERE c.relname = 'regis' and a.attname ~* 'var[1-3]'
> [...]
>
> It's a regex, remember?
> The OR isn't necessary.

Right, but I suppose, that var1 and var2 and var3 are only examples - it
could be that it would be 'chicks', 'flames' and 'tails' - what about
this? :-)
    rem
-------------------------------------------------------------------*------------
Remigiusz Sokolowski      e-mail: rems@gdansk.sprint.pl           * *
-----------------------------------------------------------------*****----------

Actually I was talking about several fields, but to make it worst I really
do not know how many fields. So I was making a quoted set of strings to
put together at sql time to say: is filed1 in (...) how ever long (...) is
An example wuld be:

a.attname in ('hello','goodbye','baisc','perl')

but I do not want to have to know the case a.attname although I can
manipulate (..) to either.

Cheers

Douglas Nichols                                           dnichols@fhcrc.org
----------------------------------------------------------------------------
Database Manager                            National Wilms Tumor Study Group
Fred Hutchinson Cancer Research Center
On Fri, 29 Jan 1999, Remigiusz Sokolowski wrote:

> > Moin!
> >
> > On Fri, 29 Jan 1999 09:43:33 +0100 (MET)
> >     Remigiusz Sokolowski <rems@gdansk.sprint.pl> wrote:
> > > >
> > > > I have this script:
> > > >       SELECT a.attname, t.typname, a.attlen
> > > >         FROM pg_class c, pg_attribute a, pg_type t
> > > >           WHERE c.relname = 'regis' and a.attname in
> > > > ('var1','var2',var3');
> > > >
> > > > but a.attname is of type name, inwhich text(..) or lower(..)
> > > > do not work with this type and I do not seem to be able to
> > > > convert type name to text....
> > > >
> > > > Can someone help me get around this?
> > > >
> > >
> > > You could use case-insensitive regex operator - Your query should looks
> > > like following:
> > >     SELECT a.attname, t.typname, a.attlen
> > >         FROM pg_class c, pg_attribute a, pg_type t
> > >         WHERE c.relname = 'regis' and (a.attname ~*'var1' OR
> > > a.attname~*'var2' OR a.attname~*'var3');
> >
> > Why not
> > [...]
> >   WHERE c.relname = 'regis' and a.attname ~* 'var[1-3]'
> > [...]
> >
> > It's a regex, remember?
> > The OR isn't necessary.
>
> Right, but I suppose, that var1 and var2 and var3 are only examples - it
> could be that it would be 'chicks', 'flames' and 'tails' - what about
> this? :-)
>     rem
> -------------------------------------------------------------------*------------
> Remigiusz Sokolowski      e-mail: rems@gdansk.sprint.pl           * *
> -----------------------------------------------------------------*****----------
>
>

>
> Actually I was talking about several fields, but to make it worst I really
> do not know how many fields. So I was making a quoted set of strings to
> put together at sql time to say: is filed1 in (...) how ever long (...) is
> An example wuld be:
>
> a.attname in ('hello','goodbye','baisc','perl')
>
> but I do not want to have to know the case a.attname although I can
> manipulate (..) to either.

I understand, that You have control under ('your','strings',...).
So first:
- You can just create loop for adding "OR myFld='string'"
- You can create loop for syntax with
where relname ~* 'pg_class|pg_attribute' for adding "|string" to Your
cases
    Rem


-------------------------------------------------------------------*------------
Remigiusz Sokolowski      e-mail: rems@gdansk.sprint.pl           * *
-----------------------------------------------------------------*****----------