Re: list all columns in db

Does anyone have a trick to list all columns in a db ?

I need to audit a few dbs to make sure column & table names are
adhering to our standard semantic syntax.

i figure there has to be an old pg-admin trick out there to display
a db like

%(tname)s . %(cname)

or some similar format

// Jonathan Vanasco

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Jonathan Vanasco ha escrito:
> Does anyone have a trick to list all columns in a db ?

SELECT *
FROM INFORMATION_SCHEMA.COLUMNS

Jonathan Vanasco wrote:
>
> Does anyone have a trick to list all columns in a db ?

No trickery, just exploit the availability of the SQL standard
information_schema views:

select table_schema, table_name, column_name
from information_schema.columns
where table_schema not in ('pg_catalog','information_schema')
order by 1,2,3

If you want an equivalent that uses pg_catalog (non-portable outside of
PostgreSQL) you could instead do:

select n.nspname as table_schema, c.relname as table_name,
a.attname as column_name
from pg_catalog.pg_attribute a
join pg_catalog.pg_class c on (a.attrelid = c.oid)
join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
where c.relkind in ('r','v') and a.attnum > 0
and n.nspname not in ('pg_catalog','information_schema')
order by 1,2,3

-Jon

--
Senior Systems Developer
Media Matters for America
http://mediamatters.org/

On Thu, Jun 07, 2007 at 06:36:07PM -0400, Jon Sime wrote:
> select n.nspname as table_schema, c.relname as table_name,
> a.attname as column_name
> from pg_catalog.pg_attribute a
> join pg_catalog.pg_class c on (a.attrelid = c.oid)
> join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
> where c.relkind in ('r','v') and a.attnum > 0
> and n.nspname not in ('pg_catalog','information_schema')
> order by 1,2,3

Don't forget "and not a.attisdropped" else you might get something
like

table_schema | table_name | column_name
--------------+------------+------------------------------
public | foo | ........pg.dropped.2........
public | foo | col1
public | foo | col3
(3 rows)

--
Michael Fuhr

On 07/06/07, Jon Sime <jsime(at)mediamatters(dot)org> wrote:
>
> Jonathan Vanasco wrote:
> >
> > Does anyone have a trick to list all columns in a db ?
>
> No trickery, just exploit the availability of the SQL standard
> information_schema views:
>
> select table_schema, table_name, column_name
> from information_schema.columns
> where table_schema not in ('pg_catalog','information_schema')
> order by 1,2,3

Is there any easy way to remove the views from the query?

Peter.

If you want an equivalent that uses pg_catalog (non-portable outside of
> PostgreSQL) you could instead do:
>
> select n.nspname as table_schema, c.relname as table_name,
> a.attname as column_name
> from pg_catalog.pg_attribute a
> join pg_catalog.pg_class c on (a.attrelid = c.oid)
> join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
> where c.relkind in ('r','v') and a.attnum > 0
> and n.nspname not in ('pg_catalog','information_schema')
> order by 1,2,3
>
> -Jon
>
> --
> Senior Systems Developer
> Media Matters for America
> http://mediamatters.org/
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: don't forget to increase your free space map settings
>

In this query:

select n.nspname as table_schema, c.relname as table_name,
a.attname as column_name
from pg_catalog.pg_attribute a
join pg_catalog.pg_class c on ( a.attrelid = c.oid)
join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
where c.relkind in ('r','v') and a.attnum > 0
and n.nspname not in ('pg_catalog','information_schema')
order by 1,2,3

change the following:
where c.relkind in ('r','v')
to
where c.relkind = 'r'

Cheers,

Andy

On 08/06/07, Peter Childs <peterachilds(at)gmail(dot)com> wrote:
>
>
>
> On 07/06/07, Jon Sime <jsime(at)mediamatters(dot)org> wrote:
> >
> > Jonathan Vanasco wrote:
> > >
> > > Does anyone have a trick to list all columns in a db ?
> >
> > No trickery, just exploit the availability of the SQL standard
> > information_schema views:
> >
> > select table_schema, table_name, column_name
> > from information_schema.columns
> > where table_schema not in ('pg_catalog','information_schema')
> > order by 1,2,3
>
>
>
> Is there any easy way to remove the views from the query?
>
> Peter.
>
>
> If you want an equivalent that uses pg_catalog (non-portable outside of
> > PostgreSQL) you could instead do:
> >
> > select n.nspname as table_schema, c.relname as table_name,
> > a.attname as column_name
> > from pg_catalog.pg_attribute a
> > join pg_catalog.pg_class c on ( a.attrelid = c.oid)
> > join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
> > where c.relkind in ('r','v') and a.attnum > 0
> > and n.nspname not in ('pg_catalog','information_schema')
> > order by 1,2,3
> >
> > -Jon
> >
> > --
> > Senior Systems Developer
> > Media Matters for America
> > http://mediamatters.org/
> >
> > ---------------------------(end of broadcast)---------------------------
> >
> > TIP 5: don't forget to increase your free space map settings
> >
>
>

Thank you Jon -- thats the exact sort of trick I was hoping for.

Cheers!

On Jun 7, 2007, at 6:36 PM, Jon Sime wrote:

> Jonathan Vanasco wrote:
>> Does anyone have a trick to list all columns in a db ?
>
> No trickery, just exploit the availability of the SQL standard
> information_schema views:
>
> select table_schema, table_name, column_name
> from information_schema.columns
> where table_schema not in ('pg_catalog','information_schema')
> order by 1,2,3
>
> If you want an equivalent that uses pg_catalog (non-portable
> outside of PostgreSQL) you could instead do:
>
> select n.nspname as table_schema, c.relname as table_name,
> a.attname as column_name
> from pg_catalog.pg_attribute a
> join pg_catalog.pg_class c on (a.attrelid = c.oid)
> join pg_catalog.pg_namespace n on (c.relnamespace = n.oid)
> where c.relkind in ('r','v') and a.attnum > 0
> and n.nspname not in ('pg_catalog','information_schema')
> order by 1,2,3
>
> -Jon
>
> --
> Senior Systems Developer
> Media Matters for America
> http://mediamatters.org/

// Jonathan Vanasco

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| CEO/Founder SyndiClick Networks
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