Hi,

Yet another problem with Turkish encoding. clean_encoding_name()
in src/backend/utils/mb/encnames.c uses tolower() to convert locale
names to lower-case. This causes errors if locale name contains
capital "I" and current olcale is Turkish. Some examples:

aaa=# \l
      List of databases
   Name    | Owner | Encoding
-----------+-------+----------
 aaa       | pgsql | LATIN5
 bbb       | pgsql | LATIN5
 template0 | pgsql | LATIN5
 template1 | pgsql | LATIN5
(4 rows)
aaa=# CREATE DATABASE ccc ENCODING='LATIN5';
ERROR:  LATIN5 is not a valid encoding name
aaa=# \encoding
SQL_ASCII
aaa=# \encoding SQL_ASCII
SQL_ASCII: invalid encoding name or conversion procedure not found
aaa=# \encoding LATIN5
LATIN5: invalid encoding name or conversion procedure not found


Patch, is a simple change to use ASCII-only lower-case conversion 
instead of locale-dependent tolower()

Best regards,
Nic.






*** ./src/backend/utils/mb/encnames.c.orig      Mon Dec  2 15:58:49 2002
--- ./src/backend/utils/mb/encnames.c   Mon Dec  2 18:13:23 2002
***************
*** 407,413 ****
        for (p = key, np = newkey; *p != '\0'; p++)
        {
                if (isalnum((unsigned char) *p))
!                       *np++ = tolower((unsigned char) *p);
        }
        *np = '\0';
        return newkey;
--- 407,416 ----
        for (p = key, np = newkey; *p != '\0'; p++)
        {
                if (isalnum((unsigned char) *p))
!                       if (*p >= 'A' && *p <= 'Z')
!                               *np++ = *p + 'a' - 'A';
!                       else
!                               *np++ = *p;
        }
        *np = '\0';
        return newkey;


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