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Bug #37339: SHOW VARIABLES not working properly with multi-byte datadir

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The SHOW VARIABLES LIKE .../SELECT @@/SELECT ... FROM INFORMATION_SCHEMA.VARIABLES
were assuming that all the system variables are in system charset (UTF-8).
However the variables that are settable through command line will have a different
character set (character_set_filesystem).
Fixed the server to remember the correct character set of basedir, datadir, tmpdir,
ssl, plugin_dir, slave_load_tmpdir, innodb variables; init_connect and init_slave 
variables and use it when processing data.

mysql-test/r/ctype_filesystem.result:
  Bug #37339: test case (should be in utf-8)
mysql-test/t/ctype_filesystem-master.opt:
  Bug #37339: test case (should be in ISO-8859-1)
mysql-test/t/ctype_filesystem.test:
  Bug #37339: test case
sql/mysqld.cc:
  Bug #37339: remember the correct character set for init_slave and init_connect
sql/set_var.cc:
  Bug #37339: 
    - remember the character set of the relevant variables
    - implement storing and using the correct 
      character set
sql/set_var.h:
  Bug #37339: implement storing and using the correct 
  character set
sql/sql_show.cc:
  Bug #37339: implement storing and using the correct 
  character set
This commit is contained in:
Georgi Kodinov 2008-11-28 16:25:16 +02:00
commit 8e688a7a02
7 changed files with 116 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

47
sql/set_var.h
View file

@ -46,9 +46,17 @@ public:
sys_after_update_func after_update;
bool no_support_one_shot;
/*
true if the value is in character_set_filesystem,
false otherwise.
Note that we can't use a pointer to the charset as the system var is
instantiated in global scope and the charset pointers are initialized
later.
*/
bool is_os_charset;
sys_var(const char *name_arg, sys_after_update_func func= NULL)
:name(name_arg), after_update(func)
, no_support_one_shot(1)
, no_support_one_shot(1), is_os_charset(FALSE)
{}
virtual ~sys_var() {}
virtual bool check(THD *thd, set_var *var);
@ -68,6 +76,7 @@ public:
Item *item(THD *thd, enum_var_type type, LEX_STRING *base);
virtual bool is_struct() { return 0; }
virtual bool is_readonly() const { return 0; }
CHARSET_INFO *charset(THD *thd);
};
@ -247,6 +256,17 @@ public:
};
class sys_var_const_os_str: public sys_var_const_str
{
public:
sys_var_const_os_str(const char *name_arg, const char *value_arg)
:sys_var_const_str(name_arg, value_arg)
{
is_os_charset= TRUE;
}
};
class sys_var_const_str_ptr :public sys_var
{
public:
@ -276,6 +296,17 @@ public:
};
class sys_var_const_os_str_ptr :public sys_var_const_str_ptr
{
public:
sys_var_const_os_str_ptr(const char *name_arg, char **value_arg)
:sys_var_const_str_ptr(name_arg, value_arg)
{
is_os_charset= TRUE;
}
};
class sys_var_enum :public sys_var
{
uint *value;
@ -791,6 +822,20 @@ public:
bool is_readonly() const { return 1; }
};
class sys_var_readonly_os: public sys_var_readonly
{
public:
sys_var_readonly_os(const char *name_arg, enum_var_type type,
SHOW_TYPE show_type_arg,
sys_value_ptr_func value_ptr_func_arg)
:sys_var_readonly(name_arg, type, show_type_arg, value_ptr_func_arg)
{
is_os_charset= TRUE;
}
};
class sys_var_thd_time_zone :public sys_var_thd
{
public: