I agree with you, but...
Actually that's not how the compare works usually.
Generally one of the operands is converted to the same datatype as the
other, and THEN the compare is performed.
I expect MS SQL is converting a 'sdas' typeless string to be assumed
CHAR and Postgresql is converting a 'sdas' typeless string to be assumed
VARCHAR.
Hence, the different behaviour.
Terry
Dann Corbit wrote:
Would you want varchar(30) 'Dann Corbit' to compare equal to bpchar(30)
'Dann Corbit'?
I would.
If both are considered character types by the language, then they must
compare that way.
Perhaps there are some nuances that I am not aware of. But that is how
things ought to behave, if I were king of the forest.
-----Original Message-----
From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-
owner@xxxxxxxxxxxxxx] On Behalf Of Terry Fielder
Sent: Wednesday, October 19, 2005 12:37 PM
To: Marc G. Fournier
Cc: Richard_D_Levine@xxxxxxxxxxxx; pgsql-general@xxxxxxxxxxxxxx
Subject: Re: [pgsql-advocacy] Oracle buys Innobase
OK, I am not an expert on the SQL standard, but I thought the
definition
varied by data type e.g. varchar <> bpchar
Terry
Marc G. Fournier wrote:
On Wed, 19 Oct 2005, Richard_D_Levine@xxxxxxxxxxxx wrote:
I was referring to trailing blanks, but did not explicitly say it,
though showed it in the examples. I am pretty sure that the SQL
standard says that trailing whitespace is insignificant in string
comparison.
Then we are broken too :)
# select 'a ' = 'a ';
?column?
----------
f
(1 row)
----
Marc G. Fournier Hub.Org Networking Services
(http://www.hub.org)
Email: scrappy@xxxxxxx Yahoo!: yscrappy ICQ:
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