Hi Michael,
>
>
> 1. How can I check if a given table exists?
> 2. How can I check if a given existing table has the right layout? (Correct
> column names and types)
>
Try this
create view my_tbldescription as
select
u.usename, t.typname AS tblname,
a.attname, a.atttypid, n.typname AS atttypname,
int4larger(a.attlen, a.atttypmod - 4) AS atttyplen,
a.attnotnull, a.attnum
from pg_user u, pg_type t, pg_attribute a, pg_type n
where u.usesysid = t.typowner
and t.typrelid = a.attrelid and t.typtype = 'c' and not (t.typname ~* 'pg_')
and n.typelem = a.atttypid
and substr(n.typname, 1, 1) = '_'
and a.attnum > 0 ;
select * from my_tbldescription order by 1,2,8 ;
It should tell you all you want to know.
Regards, Christoph
