Re: String operators <= and >=

"Patrick Vachon" <kaleidelf@hotmail.com> writes:
> We have a strange problem when searching for a string using <= and >=
> operators on Solaris.
> It did work with 7.3, but not with 7.3.3, 7.3.4 and 7.4.1.
> The database have been initialized with locale en_US.ISO8859-1

> Have a simple table testtbl:
> create table testtbl ( id int, name varchar(20));
> Insert this record:
> insert into testtbl values(10, 'PEREZ');
> Now do that search:
> select * from testtbl where name >= 'PERE' and name <= 'PERE\377';

I would expect this not to find PEREZ in that locale, no matter which PG
version you use.  Try putting the three strings in a file and sorting
them with the sort(1) command-line tool --- in en_US locale you'll
likely find that 'PERE\377' comes between the others.  For instance,
on HPUX I get:

$ cat zzz
PEREZ
PERE
PERE�
$ LC_ALL=C sort zzz
PERE
PEREZ
PERE�
$ LC_ALL=en_US.iso88591 sort zzz
PERE
PERE�
PEREZ
$

My guess is that your 7.3 installation used C locale, and you failed to
reproduce that setting when you installed the newer versions.

            regards, tom lane