Document the collating sequences used for the character types.

> -----Original Message-----
> From: Bruce Momjian [mailtogman@candle.pha.pa.us]
> Sent: Monday, October 24, 2005 11:01 AM
> To: Tom Lane
> Cc: Dann Corbit; Richard_D_Levine@raytheon.com;
general@postgresql.org;
> pgsql-hackers@postgresql.org
> Subject: Re: [GENERAL] [HACKERS] 'a' == 'a '
>
>
> Is there any TODO here?
>
>
------------------------------------------------------------------------
--
> -
>
> Tom Lane wrote:
> > "Dann Corbit" <DCorbit@connx.com> writes:
> > > I guess that additional ambiguity arises if you add additional
spaces
> to
> > > the end. Many database systems solve this by trimming the
characters
> > > from the end of the string upon storage and the returned string
will
> not
> > > have any trailing blanks.
> >
> > Can you document that? ISTM that that would effectively make
char(n)
> > and varchar(n) exactly equivalent, which is ... um ... a bit stupid.
> >
> > regards, tom lane
> >
> > ---------------------------(end of
broadcast)---------------------------
> > TIP 9: In versions below 8.0, the planner will ignore your desire to
> > choose an index scan if your joining column's datatypes do
not
> > match
> >
>
> --
> Bruce Momjian | http://candle.pha.pa.us
> pgman@candle.pha.pa.us | (610) 359-1001
> + If your life is a hard drive, | 13 Roberts Road
> + Christ can be your backup. | Newtown Square, Pennsylvania
> 19073

---------------------------(end of broadcast)---------------------------
TIP 6: explain analyze is your friend

Dann Corbit wrote:
> Document the collating sequences used for the character types.

Sorry, I don't understand that. What does it mean?

---------------------------------------------------------------------------


>
> > -----Original Message-----
> > From: Bruce Momjian [mailtogman@candle.pha.pa.us]
> > Sent: Monday, October 24, 2005 11:01 AM
> > To: Tom Lane
> > Cc: Dann Corbit; Richard_D_Levine@raytheon.com;
> general@postgresql.org;
> > pgsql-hackers@postgresql.org
> > Subject: Re: [GENERAL] [HACKERS] 'a' == 'a '
> >
> >
> > Is there any TODO here?
> >
> >
> ------------------------------------------------------------------------
> --
> > -
> >
> > Tom Lane wrote:
> > > "Dann Corbit" <DCorbit@connx.com> writes:
> > > > I guess that additional ambiguity arises if you add additional
> spaces
> > to
> > > > the end. Many database systems solve this by trimming the
> characters
> > > > from the end of the string upon storage and the returned string
> will
> > not
> > > > have any trailing blanks.
> > >
> > > Can you document that? ISTM that that would effectively make
> char(n)
> > > and varchar(n) exactly equivalent, which is ... um ... a bit stupid.
> > >
> > > regards, tom lane
> > >
> > > ---------------------------(end of
> broadcast)---------------------------
> > > TIP 9: In versions below 8.0, the planner will ignore your desire to
> > > choose an index scan if your joining column's datatypes do
> not
> > > match
> > >
> >
> > --
> > Bruce Momjian | http://candle.pha.pa.us
> > pgman@candle.pha.pa.us | (610) 359-1001
> > + If your life is a hard drive, | 13 Roberts Road
> > + Christ can be your backup. | Newtown Square, Pennsylvania
> > 19073
>

--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

---------------------------(end of broadcast)---------------------------
TIP 2: Don't 'kill -9' the postmaster