config root man

#
# show the global and session values;
#

# workaround to adjust for the directory separators being different in 
# different OSes : slash on unixes and backslash or slash on windows.
# TODO: fix with a proper comparison in mysqltest
let $rcd= `SELECT REPLACE('$MYSQL_CHARSETSDIR', '\\\\\', '.')`;
let $rcd= `SELECT REPLACE('$rcd', '/', '.')`;
let $regex_charsetdir= `SELECT '/$rcd[\\\\\/\\\\\]/MYSQL_CHARSETSDIR/'`;

--replace_regex $regex_charsetdir
select @@global.character_sets_dir;

--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.character_sets_dir;
--replace_regex $regex_charsetdir
show global variables like 'character_sets_dir';
--replace_regex $regex_charsetdir
show session variables like 'character_sets_dir';
--disable_warnings
--replace_regex $regex_charsetdir
select * from information_schema.global_variables where variable_name='character_sets_dir';
--replace_regex $regex_charsetdir
select * from information_schema.session_variables where variable_name='character_sets_dir';
--enable_warnings

#
# show that it's read-only
#
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set global character_sets_dir="foo";
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set session character_sets_dir="foo";