mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 13:32:33 +01:00
39 lines
1.7 KiB
Text
39 lines
1.7 KiB
Text
This directory holds configuration files that enable MySQL to work with
|
|
different character sets. It contains:
|
|
|
|
charset_name.xml
|
|
Each charset_name.xml file contains information for a simple character
|
|
set. The information in the file describes character types,
|
|
lower- and upper-case equivalencies and sorting orders for the
|
|
character values in the set.
|
|
|
|
Index.xml
|
|
The Index.xml file lists all of the available charset configurations,
|
|
including collations.
|
|
|
|
Each collation must have a unique number. The number is stored
|
|
IN THE DATABASE TABLE FILES and must not be changed.
|
|
|
|
The max-id attribute of the <charsets> element must be set to
|
|
the largest collation number.
|
|
|
|
Compiled in or configuration file?
|
|
When should a character set be compiled in to MySQL's string library
|
|
(libmystrings), and when should it be placed in a charset_name.xml
|
|
configuration file?
|
|
|
|
If the character set requires the strcoll functions or is a
|
|
multi-byte character set, it MUST be compiled in to the string
|
|
library. If it does not require these functions, it should be
|
|
placed in a charset_name.xml configuration file.
|
|
|
|
If the character set uses any one of the strcoll functions, it
|
|
must define all of them. Likewise, if the set uses one of the
|
|
multi-byte functions, it must define them all. See the manual for
|
|
more information on how to add a complex character set to MySQL.
|
|
|
|
Syntax of configuration files
|
|
The syntax is very simple. Words in <map> array elements are
|
|
separated by arbitrary amounts of whitespace. Each word must be a
|
|
number in hexadecimal format. The ctype array has 257 words; the
|
|
other arrays (lower, upper, etc.) take up 256 words each after that.
|