Обсуждение: create a database with encoding LATIN1
This is how I do it: when you setup your db cluster, chose the locale 'C' this will let you select LATIN1 as a database encoding. (or as fas as I understand, any other encoding)
Hope this helps
If you let it at the default value, the cluster lc is defaulted to the serveur local charset, in your case UTF8 - English_Canada.1252 (as would any modern windows/linux server be nowadays)
Hope this helps
Didier
2011/5/3 Didier Gasser-Morlay <didiergm@gmail.com>: > This is how I do it: when you setup your db cluster, chose the locale 'C' > this will let you select LATIN1 as a database encoding. (or as fas as I > understand, any other encoding) > If you let it at the default value, the cluster lc is defaulted to the > serveur local charset, in your case UTF8 - English_Canada.1252 (as would any > modern windows/linux server be nowadays) > Hope this helps > Didier That's good point. You can use C/POSIX locale with LATIN1 or any other encoding, but in such case you lost some (probably useful) text functionalities, which are provided by specific locale (upper, lower, and initcap functions bahaviour, sort order using ORDER BY etc.). "For C or POSIX locale, any character set is allowed, but for other locales there is only one character set that will work correctly. (On Windows, however, UTF-8 encoding can be used with any locale.)" "If you want the system to behave as if it had no locale support, use the special locale C or POSIX." "The drawback of using locales other than C or POSIX in PostgreSQL is its performance impact. It slows character handling and prevents ordinary indexes from being used by LIKE. For this reason use locales only if you actually need them." Regards, Grzegorz Szpetkowski
Thank you Didier and Grzegorz! That clear some part. Curiosity, am I right now in the from of this windows installation of Postgres: http://www.hollox.net/a/locale.png I know that I need LATIN1 for the project. If I check this reference sheet: http://www.postgresql.org/docs/8.4/static/multibyte.html I get: LATIN1 ISO 8859-1, ECMA 94 Western European Yes 1 ISO88591 In the list from the printscreen, I do not see LATIN1, No ISO, No Western European. How can I know what I need to choose to get LATIN1? Do I look the wrong setting? Thanks, Sebastien -----Original Message----- From: Grzegorz Szpetkowski [mailto:gszpetkowski@gmail.com] Sent: May-03-11 11:19 AM To: Didier Gasser-Morlay; sebastien@hollox.net Cc: pgsql-novice@postgresql.org Subject: Re: [NOVICE] create a database with encoding LATIN1 2011/5/3 Didier Gasser-Morlay <didiergm@gmail.com>: > This is how I do it: when you setup your db cluster, chose the locale 'C' > this will let you select LATIN1 as a database encoding. (or as fas as I > understand, any other encoding) > If you let it at the default value, the cluster lc is defaulted to the > serveur local charset, in your case UTF8 - English_Canada.1252 (as would any > modern windows/linux server be nowadays) > Hope this helps > Didier That's good point. You can use C/POSIX locale with LATIN1 or any other encoding, but in such case you lost some (probably useful) text functionalities, which are provided by specific locale (upper, lower, and initcap functions bahaviour, sort order using ORDER BY etc.). "For C or POSIX locale, any character set is allowed, but for other locales there is only one character set that will work correctly. (On Windows, however, UTF-8 encoding can be used with any locale.)" "If you want the system to behave as if it had no locale support, use the special locale C or POSIX." "The drawback of using locales other than C or POSIX in PostgreSQL is its performance impact. It slows character handling and prevents ordinary indexes from being used by LIKE. For this reason use locales only if you actually need them." Regards, Grzegorz Szpetkowski
Вложения
I see that you can only select "English, Canada" locale (and obviously POSIX/C), which has implicitly WIN1252 encoding and you can't choose any other variant locale from there. However you can create new database with appropriate locale and LATIN1 encoding in such way: CREATE DATABASE testdb WITH OWNER = postgres ENCODING = 'LATIN1' LC_COLLATE = 'eng_canada.28591' LC_CTYPE = 'eng_canada.28591' TEMPLATE = template0; If you want get eng_canada.28591 encoding for whole database cluster, then you need to drop existing one and then use initdb with -locale param. More information: http://msdn.microsoft.com/en-us/library/hzz3tw78 Regards, Grzegorz Szpetkowski 2011/5/3 Sébastien D'Errico <sebastien@hollox.net>: > Thank you Didier and Grzegorz! > > That clear some part. > > Curiosity, am I right now in the from of this windows installation of > Postgres: > http://www.hollox.net/a/locale.png > > I know that I need LATIN1 for the project. If I check this reference sheet: > http://www.postgresql.org/docs/8.4/static/multibyte.html > > I get: > LATIN1 ISO 8859-1, ECMA 94 Western European Yes 1 ISO88591 > > In the list from the printscreen, I do not see LATIN1, No ISO, No Western > European. > > How can I know what I need to choose to get LATIN1? > > Do I look the wrong setting? > > Thanks, > Sebastien > > -----Original Message----- > From: Grzegorz Szpetkowski [mailto:gszpetkowski@gmail.com] > Sent: May-03-11 11:19 AM > To: Didier Gasser-Morlay; sebastien@hollox.net > Cc: pgsql-novice@postgresql.org > Subject: Re: [NOVICE] create a database with encoding LATIN1 > > 2011/5/3 Didier Gasser-Morlay <didiergm@gmail.com>: >> This is how I do it: when you setup your db cluster, chose the locale 'C' >> this will let you select LATIN1 as a database encoding. (or as fas as I >> understand, any other encoding) >> If you let it at the default value, the cluster lc is defaulted to the >> serveur local charset, in your case UTF8 - English_Canada.1252 (as would any >> modern windows/linux server be nowadays) >> Hope this helps >> Didier > > That's good point. You can use C/POSIX locale with LATIN1 or any other > encoding, but in such case you lost some (probably useful) text > functionalities, which are provided by specific locale (upper, lower, > and initcap functions bahaviour, sort order using ORDER BY etc.). > > "For C or POSIX locale, any character set is allowed, but for other > locales there is only one character set that will work correctly. (On > Windows, however, UTF-8 encoding can be used with any locale.)" > > "If you want the system to behave as if it had no locale support, use > the special locale C or POSIX." > > "The drawback of using locales other than C or POSIX in PostgreSQL is > its performance impact. It slows character handling and prevents > ordinary indexes from being used by LIKE. For this reason use locales > only if you actually need them." > > Regards, > Grzegorz Szpetkowski >
I also asked question at http://forums.enterprisedb.com/posts/list/2747.page I am sure that I saw installer with encoding selection option for locale e.g. http://pginstaller.projects.postgresql.org/pginst5.png in which you can specify database cluster encoding. Unfortunately AFAIS pgInstaller is not available for PostgreSQL 8.2+. Regards, Grzegorz Szpetkowski 2011/5/3 Sébastien D'Errico <sebastien@hollox.net>: > Thank you Didier and Grzegorz! > > That clear some part. > > Curiosity, am I right now in the from of this windows installation of > Postgres: > http://www.hollox.net/a/locale.png > > I know that I need LATIN1 for the project. If I check this reference sheet: > http://www.postgresql.org/docs/8.4/static/multibyte.html > > I get: > LATIN1 ISO 8859-1, ECMA 94 Western European Yes 1 ISO88591 > > In the list from the printscreen, I do not see LATIN1, No ISO, No Western > European. > > How can I know what I need to choose to get LATIN1? > > Do I look the wrong setting? > > Thanks, > Sebastien > > -----Original Message----- > From: Grzegorz Szpetkowski [mailto:gszpetkowski@gmail.com] > Sent: May-03-11 11:19 AM > To: Didier Gasser-Morlay; sebastien@hollox.net > Cc: pgsql-novice@postgresql.org > Subject: Re: [NOVICE] create a database with encoding LATIN1 > > 2011/5/3 Didier Gasser-Morlay <didiergm@gmail.com>: >> This is how I do it: when you setup your db cluster, chose the locale 'C' >> this will let you select LATIN1 as a database encoding. (or as fas as I >> understand, any other encoding) >> If you let it at the default value, the cluster lc is defaulted to the >> serveur local charset, in your case UTF8 - English_Canada.1252 (as would any >> modern windows/linux server be nowadays) >> Hope this helps >> Didier > > That's good point. You can use C/POSIX locale with LATIN1 or any other > encoding, but in such case you lost some (probably useful) text > functionalities, which are provided by specific locale (upper, lower, > and initcap functions bahaviour, sort order using ORDER BY etc.). > > "For C or POSIX locale, any character set is allowed, but for other > locales there is only one character set that will work correctly. (On > Windows, however, UTF-8 encoding can be used with any locale.)" > > "If you want the system to behave as if it had no locale support, use > the special locale C or POSIX." > > "The drawback of using locales other than C or POSIX in PostgreSQL is > its performance impact. It slows character handling and prevents > ordinary indexes from being used by LIKE. For this reason use locales > only if you actually need them." > > Regards, > Grzegorz Szpetkowski >
