| From: | Bruno Wolff III <bruno(at)wolff(dot)to> | 
|---|---|
| To: | KÖPFERL Robert <robert(dot)koepferl(at)sonorys(dot)at> | 
| Cc: | "'dpandey(at)secf(dot)com'" <dpandey(at)secf(dot)com>, 'Richard Huxton' <dev(at)archonet(dot)com>, pgsql-general(at)postgresql(dot)org, 'PostgreSQL' <pgsql-sql(at)postgresql(dot)org> | 
| Subject: | Re: index row size 2728 exceeds btree maximum, 27 | 
| Date: | 2005-06-02 12:31:50 | 
| Message-ID: | 20050602123150.GB6785@wolff.to | 
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| Lists: | pgsql-general pgsql-sql | 
On Thu, Jun 02, 2005 at 14:08:54 +0200,
  KÖPFERL Robert <robert(dot)koepferl(at)sonorys(dot)at> wrote:
> To me it seems that the definer of this table missed the concept index ...
> or the concept database
> One usually looks up data using a key, but if the whole row is the key, what
> data shall be looked up.
You sometimes do want to make a whole role a key to avoid duplicate keys.
A common case is when you use a table to connect two other tables with
a many to many relation.
It would be rare to want to do that with large text values though.
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