Re: [GENERAL] 'a' == 'a '

["Dann Corbit" <DCorbit(at)connx(dot)com>]

Document the collating sequences used for the character types.

> -----Original Message-----
> From: Bruce Momjian [mailto:pgman(at)candle(dot)pha(dot)pa(dot)us]
> Sent: Monday, October 24, 2005 11:01 AM
> To: Tom Lane
> Cc: Dann Corbit; Richard_D_Levine(at)raytheon(dot)com;
general(at)postgresql(dot)org;
> pgsql-hackers(at)postgresql(dot)org
> Subject: Re: [GENERAL] [HACKERS] 'a' == 'a '
> 
> 
> Is there any TODO here?
> 
>
------------------------------------------------------------------------
--
> -
> 
> Tom Lane wrote:
> > "Dann Corbit" <DCorbit(at)connx(dot)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
> >
> 
> --
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