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Patch for BUG#30472: libmysql doesn't reset charset,

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insert_id after succ. mysql_change_user() call.

See also WL 4066.
  
This bug reveals two problems:
  - the problem on the client side which was described originally;
  - the problem in protocol / the server side: connection context
    on client and server should be like after mysql_real_connect()
    and be consistent. The server however just resets character
    set variables to the global defaults.

The fix seems to be as follows:
  - extend the protocol so that the client be able to send
    character set information in COM_CHANGE_USER command;
  - change the server so that it understands client character set
    in the command;
  - change the client:
    - reset character set to the default value (which has been
      read from the configuration);
    - send character set in COM_CHANGE_USER command.


client/client_priv.h:
  Declare a function, used in libmysql.c and client.c.
libmysql/libmysql.c:
  1. Reset character set on the client in mysql_change_user().
  2. Send character set to the server in COM_CHANGE_USER command.
mysql-test/t/mysql_client_test.test:
  mysql_client_test.log is used by the test suite.
  
  Use mysql_client_test.out.log to collect mysql_client_test
  real output.
sql/sql_parse.cc:
  Switch character set in COM_CHANGE_USER.
tests/mysql_client_test.c:
  Test case for BUG#30472.
This commit is contained in:
unknown 2007-09-28 23:30:54 +04:00
commit 20b08f4705
5 changed files with 218 additions and 6 deletions
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26
libmysql/libmysql.c
View file

@ -685,14 +685,25 @@ int cli_read_change_user_result(MYSQL *mysql, char *buff, const char *passwd)
return 0;
}
my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
const char *passwd, const char *db)
{
char buff[512],*end=buff;
int rc;
CHARSET_INFO *saved_cs= mysql->charset;
DBUG_ENTER("mysql_change_user");
/* Get the connection-default character set. */
if (mysql_init_character_set(mysql))
{
mysql->charset= saved_cs;
DBUG_RETURN(TRUE);
}
/* Use an empty string instead of NULL. */
if (!user)
user="";
if (!passwd)
@ -721,6 +732,14 @@ my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
/* Add database if needed */
end= strmov(end, db ? db : "") + 1;
/* Add character set number. */
if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
{
*end= (uchar) mysql->charset->number;
++end;
}
/* Write authentication package */
simple_command(mysql,COM_CHANGE_USER, (uchar*) buff, (ulong) (end-buff), 1);
@ -743,6 +762,11 @@ my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
mysql->passwd=my_strdup(passwd,MYF(MY_WME));
mysql->db= db ? my_strdup(db,MYF(MY_WME)) : 0;
}
else
{
mysql->charset= saved_cs;
}
DBUG_RETURN(rc);
}