Re: List table with same column name

On Thu, 23 Oct 2003 achill(at)matrix(dot)gatewaynet(dot)com wrote:

> On Thu, 23 Oct 2003, Peter Childs wrote:
>
> >
> >
> > On Thu, 23 Oct 2003 achill(at)matrix(dot)gatewaynet(dot)com wrote:
> >
> > > On Thu, 23 Oct 2003, Abdul Wahab Dahalan wrote:
> > >
> > > > Hi!
> > > > How do I list all the tables in the database which has a same column name?.
> > >
> > > SELECT t1.relname,a1.attname,t2.relname from pg_class t1,pg_attribute
> > > a1,pg_class t2,pg_attribute a2 where a1.attrelid=t1.oid and t1.relkind='r'
> > > and a1.attnum>0 and a2.attrelid=t2.oid and t2.relkind='r' and a2.attnum>0
> > > and t1.relname<t2.relname and a1.attname = a2.attname;
> >
> > That will not work.
> >
> > SELECT t1.relname,a1.attname,t2.relname from pg_class t1,pg_attribute
> > a1,pg_class t2,pg_attribute a2 where a1.attrelid=t1.oid and
> > t1.relkind='r'and a1.attnum>0 and a2.attrelid=t2.oid and t2.relkind='r'
> > and a2.attnum>0 and t1.relname<t2.relname and a1.attname = a2.attname and
> > a1.attisdropped=false and a2.attisdropped=false and t1.relname !=
> > t2.relname;
> >
> > Why?
> >
> > Well two bugs.
> > 1> Dropped Columns needed for 7.3.
> > 2> Do you really need to know that column a in table 1 also appears in
> > table 1?
>
> Have you ever thought that x<y implies x!=y ?

Yes but when I tested it due to pure intrest to told me that
column a in table 1 also appeared in table 1. Most strange.

Peter Childs

>
> >
> > Peter Childs
> >
> > >
> > > >
> > > > Thanks
> > > >
> > > >
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> > > -Achilleus
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> -Achilleus
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