Обсуждение: UTF-8 to ASCII
I have a doubt about the function to_ascii() and what the documentation says. Basically, I passed my DB from latin1 to UTF-8, and I started getting an error when using the to_ascii() function on a field of one of my DB [1]: ERROR: la conversión de codificación de UTF8 a ASCII no está soportada OK, it's in spanish, but basically it says that the conversion UTF8 to ASCII is not supported, but in the documentation [2] I see this in the "Table 9-7. Built-in Conversions": utf8_to_ascii UTF8 SQL_ASCII Is the documentation wrong or something? I'm on postgresql-8.1.8, and as you can see, I'm checking the corresponding documentation. [1]: This I already solved using convert() to pass from UTF to Latin1, and after that I do a to_ascii(). [2]: http://www.postgresql.org/docs/8.1/interactive/functions-string.html#FTN.AEN7625 -- 21:50:04 up 2 days, 9:07, 0 users, load average: 0.92, 0.37, 0.18 --------------------------------------------------------- Lic. Martín Marqués | SELECT 'mmarques' || Centro de Telemática | '@' || 'unl.edu.ar'; Universidad Nacional | DBA, Programador, del Litoral | Administrador ---------------------------------------------------------
for convert my DB, i use this process: createdb -T "old_DB" "copy_old_DB" dropdb "old_DB" createdb -E LATIN1 -T "copy_old_DB" "new_DB_name" maybe this process will help you. regards Jérôme LEGEAY Le 14:13 11/05/2007, vous avez écrit: >I have a doubt about the function to_ascii() and what the documentation says. > >Basically, I passed my DB from latin1 to UTF-8, and I started getting an >error when using the to_ascii() function on a field of one of my DB [1]: > >ERROR: la conversión de codificación de UTF8 a ASCII no está soportada > >OK, it's in spanish, but basically it says that the conversion UTF8 to >ASCII is not supported, but in the documentation [2] I see this in the >"Table 9-7. Built-in Conversions": > >utf8_to_ascii UTF8 SQL_ASCII > >Is the documentation wrong or something? > >I'm on postgresql-8.1.8, and as you can see, I'm checking the >corresponding documentation. > >[1]: This I already solved using convert() to pass from UTF to Latin1, and >after that I do a to_ascii(). >[2]: >http://www.postgresql.org/docs/8.1/interactive/functions-string.html#FTN.AEN7625 > >-- > 21:50:04 up 2 days, 9:07, 0 users, load average: 0.92, 0.37, 0.18 >--------------------------------------------------------- >Lic. Martín Marqués | SELECT 'mmarques' || >Centro de Telemática | '@' || 'unl.edu.ar'; >Universidad Nacional | DBA, Programador, > del Litoral | Administrador >--------------------------------------------------------- > >---------------------------(end of broadcast)--------------------------- >TIP 4: Have you searched our list archives? > > http://archives.postgresql.org/ >
LEGEAY Jérôme wrote:
> for convert my DB, i use this process:
>
>
> createdb -T "old_DB" "copy_old_DB"
> dropdb "old_DB"
> createdb -E LATIN1 -T "copy_old_DB" "new_DB_name"
>
> maybe this process will help you.
As I said in my original mail, the DB conversion went OK, but I see some
discrepancies in the documentation.
My question is if the documentation is correct, and if so, why don't I
get the right behavior?
--
21:50:04 up 2 days, 9:07, 0 users, load average: 0.92, 0.37, 0.18
---------------------------------------------------------
Lic. Martín Marqués | SELECT 'mmarques' ||
Centro de Telemática | '@' || 'unl.edu.ar';
Universidad Nacional | DBA, Programador,
del Litoral | Administrador
---------------------------------------------------------
Martin Marques a écrit : > I have a doubt about the function to_ascii() and what the documentation > says. > > Basically, I passed my DB from latin1 to UTF-8, and I started getting an > error when using the to_ascii() function on a field of one of my DB [1]: > > ERROR: la conversión de codificación de UTF8 a ASCII no está soportada > > OK, it's in spanish, but basically it says that the conversion UTF8 to > ASCII is not supported, but in the documentation [2] I see this in the > "Table 9-7. Built-in Conversions": > > utf8_to_ascii UTF8 SQL_ASCII > > Is the documentation wrong or something? Hi Martin, I think the documentation of 8.1 is wrong. It looks different indocumentation of 8.2 : to_ascii : Convert string to ASCII from another encoding *(only supports conversion from LATIN1, LATIN2, LATIN9, and WIN1250encodings)* Hi ran into this problem too, and I wrote a function that converts from DB encoding to LATIN9 before doing the to_ascii conversion: /to_ascii(convert(mystring, 'LATIN9'), 'LATIN9')/ Regards -- Arnaud
> I have a doubt about the function to_ascii() and what the > documentation says. > > Basically, I passed my DB from latin1 to UTF-8, and I started What do you mean by 'passed the DB from Latin1 to UTF8'? > getting an error when using the to_ascii() function on a field > of one of my DB [1]: > > ERROR: la conversión de codificación de UTF8 a ASCII no está soportada > > OK, it's in spanish, but basically it says that the conversion > UTF8 to ASCII is not supported, but in the documentation [2] I see > this in the "Table 9-7. Built-in Conversions": > > utf8_to_ascii UTF8 SQL_ASCII > > Is the documentation wrong or something? > > I'm on postgresql-8.1.8, and as you can see, I'm checking the > corresponding documentation. > > [1]: This I already solved using convert() to pass from UTF > to Latin1, and after that I do a to_ascii(). > [2]: > http://www.postgresql.org/docs/8.1/interactive/functions-string.html#FTN.AEN7625 Well, the documentation for to_ascii states clearly: "The to_ascii function supports conversion from LATIN1, LATIN2, LATIN9, and WIN1250 encodings only." The table of conversions you quote belongs to the function convert(). So that should answer your question. I am not sure what you are trying to achieve. If you tell us, I might be able to tell you HOW to achieve it. Yours, Laurenz Albe
Albe Laurenz wrote: >> [2]: >> http://www.postgresql.org/docs/8.1/interactive/functions-string.html#FTN.AEN7625 > > Well, the documentation for to_ascii states clearly: > "The to_ascii function supports conversion from LATIN1, LATIN2, > LATIN9, and WIN1250 encodings only." Sorry, didn't see the footnote on the table. -- 21:50:04 up 2 days, 9:07, 0 users, load average: 0.92, 0.37, 0.18 --------------------------------------------------------- Lic. Martín Marqués | SELECT 'mmarques' || Centro de Telemática | '@' || 'unl.edu.ar'; Universidad Nacional | DBA, Programador, del Litoral | Administrador ---------------------------------------------------------
Martin Marques escribió:
> I have a doubt about the function to_ascii() and what the documentation
> says.
>
> Basically, I passed my DB from latin1 to UTF-8, and I started getting an
> error when using the to_ascii() function on a field of one of my DB [1]:
>
> ERROR: la conversión de codificación de UTF8 a ASCII no está soportada
Well, the to_ascii() documentation says that it only supports LATIN1,
LATIN2, LATIN9, and WIN1250. This is on a footnote.
I do think that there's something strange on the vicinity anyway,
because using convert() expliciting the conversion function gives a
mismatching error for me (local environment is UTF8, as is
client_encoding):
alvherre=# select convert('Martín' using utf8_to_ascii);
ERROR: character 0xc3 of encoding "MULE_INTERNAL" has no equivalent in "SQL_ASCII"
Why on earth is it talking about MULE_INTERNAL?
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
Apparently you will need to implement a UNICODE aware JDBC driver http://archives.postgresql.org/pgsql-general/2004-01/msg01649.php Martín This email message and any files transmitted with it contain confidential information intended only for the person(s) to whom this email message is addressed. If you have received this email message in error, please notify the sender immediately by telephone or email and destroy the original message without making a copy. Thank you. ----- Original Message ----- From: "Alvaro Herrera" <alvherre@commandprompt.com> To: "Martin Marques" <martin@bugs.unl.edu.ar> Cc: <pgsql-general@postgresql.org> Sent: Friday, May 11, 2007 9:33 AM Subject: Re: [GENERAL] UTF-8 to ASCII > Martin Marques escribió: >> I have a doubt about the function to_ascii() and what the documentation >> says. >> >> Basically, I passed my DB from latin1 to UTF-8, and I started getting an >> error when using the to_ascii() function on a field of one of my DB [1]: >> >> ERROR: la conversión de codificación de UTF8 a ASCII no está soportada > > Well, the to_ascii() documentation says that it only supports LATIN1, > LATIN2, LATIN9, and WIN1250. This is on a footnote. > > I do think that there's something strange on the vicinity anyway, > because using convert() expliciting the conversion function gives a > mismatching error for me (local environment is UTF8, as is > client_encoding): > > alvherre=# select convert('Martín' using utf8_to_ascii); > ERROR: character 0xc3 of encoding "MULE_INTERNAL" has no equivalent in > "SQL_ASCII" > > > Why on earth is it talking about MULE_INTERNAL? > > -- > Alvaro Herrera > http://www.CommandPrompt.com/ > PostgreSQL Replication, Consulting, Custom Development, 24x7 support > > ---------------------------(end of broadcast)--------------------------- > TIP 1: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to majordomo@postgresql.org so that your > message can get through to the mailing list cleanly >
Alvaro Herrera <alvherre@commandprompt.com> writes:
> Why on earth is it talking about MULE_INTERNAL?
IIRC, a lot of the conversions translate through some common
intermediate charset to save on code/table space. In such cases
the problem will usually be detected on the backend conversion...
regards, tom lane
Tom Lane escribió: > Alvaro Herrera <alvherre@commandprompt.com> writes: > > Why on earth is it talking about MULE_INTERNAL? > > IIRC, a lot of the conversions translate through some common > intermediate charset to save on code/table space. In such cases > the problem will usually be detected on the backend conversion... Interesting, but it doesn't explain why the conversion doesn't work. AFAICS the operation I am requesting is valid. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.