Re: Show tables query

On Sun, 2 Apr 2006, Grega Bremec wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: RIPEMD160
>
> Andy Shellam wrote:
> | Hi,
> |
> | Is there an SQL command supported by Postgres to return a list of
> | tables in a database?
> |
> | For example on mySQL, you can connect to a database and issue the
> | command SHOW TABLES to bring back a list of tables in that database.
> | In PG this throws the error "unknown configuration parameter TABLES.">
>
> Hello, Andy.
>
> Not a command per se, but there are two ways you can obtain this
> information, depending on where you're working.
>
> The first option is the backslash commands you can use from f.e. psql
> (type \? in a psql prompt to see the full list), where \d will list all
> sorts of database objects, \dt can be used specifically for tables.
>
> The other option which you can use from an SQL script is accessing the
> system tables pg_class, pg_namespace and pg_tablespace in schema
> pg_catalog, using a query similar to those used by the backslash commands:
>
> ~ template1=# SELECT c.relname AS table FROM pg_class c
> ~ LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
> ~ WHERE n.nspname = 'public'
> ~ AND c.relkind = 'r';
>
> Substitute 'public' for whatever schema you're interested in or add
> other schemas according to your preference. Also, take a look at system
> view pg_tables (\d pg_tables).
>
> Also, take a look at the archives, Elein once posted a nice set of views
> ~ and statements you can use for such purposes.

psql -E will show you all queries that internal commands generate

>
> Hope this helped,
> - --
> ~ Grega Bremec
> ~ gregab at p0f dot net
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.0 (GNU/Linux)
>
> iD8DBQFEL5qjfu4IwuB3+XoRA7CDAKCBFI7749wtFfsf4GXm3JcPQBU81gCffZMT
> GbeTZzo0T3RJBwvwlK61O9c=
> =NhhS
> -----END PGP SIGNATURE-----
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org
>

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru)
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83