FYI, we decided we didn't want this additional capability. ---------------------------------------------------------------------------
Florian G. Pflug wrote: > Kevin Grittner wrote: > >>>> On Thu, Aug 23, 2007 at 3:01 PM, in message <[EMAIL PROTECTED]>, > > Tom Lane <[EMAIL PROTECTED]> wrote: > >> The only argument I've > >> heard that carries much weight with me is that it eases porting from > >> other DBMS's that allow this. Are there any others besides Oracle? > > > >> select * from (select f1 from t) > > > > In Sybase: > > > > com.sybase.jdbc2.jdbc.SybSQLException: The derived table expression is > > missing a correlation name. Check derived table syntax in the Reference > > Manual. > > Error code: 11753 > > SQL state: ZZZZZ > > The really funny thing is that pgsql, mysql and at least sybase > *explicitly* dissallow the no-alias case. Which shows that > .) This seems to be common source of confusion and errors. > .) Aliasless-Subqueries wouldn't lead to ambigous grammras in those > databases. > Otherwise, you'd expect to get some more generic syntax error, and not > the very explicit "No alias, but expected one". > > I agree with Tom - knowing *why* the standard committee disallows that syntax > - > and why everybody except oracle chose to agree with it would be quite > interesting. > > greetings, Florian Pflug > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: don't forget to increase your free space map settings -- Bruce Momjian <[EMAIL PROTECTED]> http://momjian.us EnterpriseDB http://postgres.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
