Re: RE: pl/pgsql and returning rows - Mailing list pgsql-sql

FYI, I am always looking for additional examples that I should add in
the next edition.


> Yes: good example!  I keep a printed copy on my desk... :-)
> 
> > -----Original Message-----
> > From:    Bruce Momjian [SMTP:pgman@candle.pha.pa.us]
> > Sent:    Tuesday, March 27, 2001 3:52 PM
> > To:    Jeff Eckermann
> > Cc:    pgsql-sql@postgresql.org; wade
> > Subject:    Re: [SQL] RE: pl/pgsql and returning rows
> > 
> > MY book in chapter 18 has a Pl/PgSQL function called change_statename
> > that does insert/update automatically.
> > 
> >     http://www.postgresql.org/docs/awbook.html
> > 
> > > As a workaround, you can insert your row into an existing table, then
> > > retrieve it from there later.  I think you need to enumerate all of the
> > > fields, as in 'INSERT INTO table VALUES (ret.field1,
> > > ret.field2,...ret.fieldn);'.  At least, I haven't succeeded any other
> > way.
> > > Messy, but the best method available right now.
> > > 
> > > > -----Original Message-----
> > > > From:    Richard Huxton [SMTP:dev@archonet.com]
> > > > Sent:    Tuesday, March 27, 2001 2:27 AM
> > > > To:    pgsql-sql@postgresql.org; wade
> > > > Subject:    Re: pl/pgsql and returning rows
> > > > 
> > > > From: "wade" <wade@wavefire.com>
> > > > 
> > > > > create function get_details(int4) returns details as '
> > > > > declare
> > > > >   ret details%ROWTYPE;
> > > > >   site_rec    record;
> > > > >   cntct       contacts%ROWTYPE;
> > > > > begin
> > > > >   select into site_rec  * sites_table where id = $1 limit 1;
> > > > >   select into cntct * from contacts where id = site_rec.contact;
> > > > >
> > > > > -- and then i populate rows of ret.
> > > > >   ret.name := cntct.name;
> > > > >   ret.ip := site_rec.ip;
> > > > > .
> > > > > .
> > > > > .
> > > > >   return ret;
> > > > > end;
> > > > > ' language 'plpgsql';
> > > > >
> > > > > now the problem is when is when I do a:
> > > > >   SELECT get_details(55);
> > > > > all i get is a single oid-looking return value:
> > > > >  get_details
> > > > > -------------
> > > > >  136295592
> > > > > (1 row)
> > > > 
> > > > Sorry - you can't return a row from a function at the present time
> > (except
> > > > for trigger functions which are special) although I believe this is on
> > the
> > > > todo list for a later 7.x release.
> > > > 
> > > > Just from the top of my head, you might try a view with a select rule,
> > > > although I'm not completely clear what your objectives are.
> > > > 
> > > > - Richard Huxton
> > > > 
> > > > 
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> > 
> > 
> > -- 
> >   Bruce Momjian                        |  http://candle.pha.pa.us
> >   pgman@candle.pha.pa.us               |  (610) 853-3000
> >   +  If your life is a hard drive,     |  830 Blythe Avenue
> >   +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026
> 


--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026