From: Alain Lavigne <alavigne@zaq.com>
To: pgsql-sql@postgresql.org
Subject: SQL question
Date: Tue, 6 Feb 2001 08:37:41 -0500
Message-ID: <95ouf1$hp3$1@news.tht.net> (raw)
I'm trying to extract references (relationships) between tables for the
purpose of reverse/forward engineer from a modeling tool called
PowerDesigner.
Here is the sql:
select u.usename,
p.relname,
v.usename,
c.relname,
t.tgconstrname,
dumpref(t.tgargs, 4), ** (I know this function does not exist in
postgresql)
dumpref(t.tgargs, 5)
from pg_trigger t,
pg_proc f,
pg_class p,
pg_class c,
pg_user u,
pg_user v
where 1=1
and f.proname='RI_FKey_check_ins'
and t.tgfoid=f.oid
and c.oid=t.tgrelid
and p.oid=t.tgconstrrelid
and u.usesysid=p.relowner
and v.usesysid=c.relowner;
I always get the following message:
** << Error while executing the query; ERROR: Function 'dumpref(bytea,
int4)'
does not exist Unable to identify a function that satisfies the given
argument types You may need to add explicit typecasts >>
Since integrity constraints are done using triggers, i makes sense that I
can reverse engineer those FK constraint from the pg_trigger table.
Unfortunately I don't know how to extract the information from the "tgargs"
field.
CAN ANYONE HELP ??
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To: pgsql-sql@postgresql.org
Cc: alavigne@zaq.com
Subject: Re: SQL question
In-Reply-To: <95ouf1$hp3$1@news.tht.net>
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