Обсуждение: Set LC_COLLATE to de_DE_phoneb
How to set the collation of a database to the german phone book sort order? I did ask this on several places. Finally the moderator of pg-forum.de recommended to ask here. See the discussion there: http://www.pg-forum.de/konfiguration/4308-sortierfolge-de_de_phoneb.html Environment: PostgreSQL 8.4.3 build 1400, 32 Bit, Windows XP The usual german collation is "German_Germany.1252". This corresponds to the windows language setting de_DE an in the registry (HKEY_CURRENT_USER \control\Panel\International\Locale) to the value 00000407. The german phone book order has the windows language setting de_DE_phoneb an the value 00010407 in the registry. Unfortunately I was not able to find a corresponding string for the LC_COLLATE setting. I searched the sources of postgresql an found the function IsoLocaleName(...) in src/backend/utils/adt/pg_locale.c. I guess this should be the place for further investigations. Or am I wrong? I'm not quite well in C and without some knowledge of the libraries behind I make no progress. Can anyone help me out? Is there anywhere a documentation or a "translation table" for the different representations of the language settings between the postgresql- and the windows-"world"? Background: I moved an old application from a borland paradox database to postgesql. The speed gain is great but the sorting order isn't the usual to the user. I can't change the order by clauses of the select statements because they are generated by the borland database engine. Thanks in advance Frank Jagusch -- http://www.jagusch-online.de/cdlfj
Frank Jagusch <frank@jagusch-online.de> wrote: > The german phone book order has the windows language setting > de_DE_phoneb an the value 00010407 in the registry. Unfortunately I was > not able to find a corresponding string for the LC_COLLATE setting. I cannot find any resources for "de_DE_phoneb" in Web. What is the true name for it? Locale names should be in <Country>_<Language>.<CodePage> format on Windows. If you can find the counterpart name for it, you can initialize PostgreSQL DB with the locale, and <CodePage> or UTF-8 encoding. > Background: I moved an old application from a borland paradox database > to postgesql. The speed gain is great but the sorting order isn't the > usual to the user. I can't change the order by clauses of the select > statements because they are generated by the borland database engine. I'm afraid of "de_DE_phoneb" is an original locale implementation in your old database. If so, PostgreSQL cannot support it because postgres depends on locale libraries in each platform. (i.e., msvcrt on Windows) Regards, --- Takahiro Itagaki NTT Open Source Software Center
Frank Jagusch <frank@jagusch-online.de> wrote: > "de_DE_phoneb" is the name of an alternative sorting in german (only a > few languages have alternate sorting). You may find some information > when you search the MSDN for "de_DE_phoneb", i.e. > http://msdn.microsoft.com/en-en/library/ms404373.aspx > These alternate sorting is supported by the OS, but I don't know how it > is supported in the msvcrt. Hmmm, I found "de-DE_phoneb" in MSDN: http://msdn.microsoft.com/en-us/library/dd374060 but setlocale("de-DE_phoneb") always fails at least on my machine. The doc says "de-DE_phoneb" is a locale name for MAKELCID(MAKELANGID(LANG_GERMAN, SUBLANG_GERMAN), SORT_GERMAN_PHONE_BOOK). Some of native Win32 APIs could accept the locale and sort-order combination, but setlocale() in CRT seems to reject it. So, you could use the locale if you find a setlocale-compatible name of "de-DE_phoneb". Or, you cannot use it, unless we modify PostgreSQL to use Win32 locale functions instead of standard libc ones -- but it is hardly acceptable. Regards, --- Takahiro Itagaki NTT Open Source Software Center
Am Donnerstag, den 08.04.2010, 10:27 +0900 schrieb Takahiro Itagaki: > Frank Jagusch <frank@jagusch-online.de> wrote: > > > "de_DE_phoneb" is the name of an alternative sorting in german (only a > > few languages have alternate sorting). You may find some information > > when you search the MSDN for "de_DE_phoneb", i.e. > > http://msdn.microsoft.com/en-en/library/ms404373.aspx > > These alternate sorting is supported by the OS, but I don't know how it > > is supported in the msvcrt. > > Hmmm, I found "de-DE_phoneb" in MSDN: > http://msdn.microsoft.com/en-us/library/dd374060 > but setlocale("de-DE_phoneb") always fails at least on my machine. Is it a windows box? May be you need to install some german language support? > The doc says "de-DE_phoneb" is a locale name for > MAKELCID(MAKELANGID(LANG_GERMAN, SUBLANG_GERMAN), SORT_GERMAN_PHONE_BOOK). > Some of native Win32 APIs could accept the locale and sort-order > combination, but setlocale() in CRT seems to reject it. > > So, you could use the locale if you find a setlocale-compatible name of > "de-DE_phoneb". As far as I investigated I didn't find one. I hoped to find such a setlocale-compatible name or a hint where to search here... > Or, you cannot use it, unless we modify PostgreSQL to > use Win32 locale functions instead of standard libc ones -- but it is > hardly acceptable. I thought PostgreSQL is using OS specific functions for sorting (means Win32 functions?). This sounds not good for my request. So I ask the whole audience: Are others out there asking for a support for the alternate sort orders? Is it worth to discuss further in this direction? Here an other Idea: Is there a way to define a custom collation for a database? Thanks so far, Frank Jagusch -- http://www.jagusch-online.de/frank
On Thu, Apr 08, 2010 at 06:59:44PM +0200, Frank Jagusch wrote: > I thought PostgreSQL is using OS specific functions for sorting (means > Win32 functions?). This sounds not good for my request. So I ask the > whole audience: Are others out there asking for a support for the > alternate sort orders? Is it worth to discuss further in this direction? > > Here an other Idea: Is there a way to define a custom collation for a > database? Over the years there have been various options suggested and various patches posted but they never make it, for various reasons. The only concerted effort I know of is the PostgreSQL ICU patch which is in FreeBSD ports, to work around the fact that it's C library doesn't handle UTF-8 collation at all. http://people.freebsd.org/~girgen/postgresql-icu/README.html I doubt it's been tested for Windows, but if it works it will give you alternate sort orders and even custom sort orders. Have a nice day, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > Patriotism is when love of your own people comes first; nationalism, > when hate for people other than your own comes first. > - Charles de Gaulle