| 123456789101112131415161718192021222324252627282930313233343536373839 |
- 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.
|
