Fix for Bug#2151:

"USE db"  affected the character set of further CREATE DATABASEs,
which should have not happened.

BitKeeper/etc/logging_ok

@@ -12,6 +12,7 @@ antony@ltantony.rdg.cyberkinetica.homeunix.net
 arjen@co3064164-a.bitbike.com
 arjen@fred.bitbike.com
 arjen@george.bitbike.com
+bar@bar.intranet.mysql.r18.ru
 bar@bar.mysql.r18.ru
 bar@bar.udmsearch.izhnet.ru
 bar@gw.udmsearch.izhnet.ru

mysql-test/r/ctype_create.result

+SET @@character_set_server=latin5;
+CREATE DATABASE db1 DEFAULT CHARACTER SET cp1251;
+USE db1;
+CREATE DATABASE db2;
+SHOW CREATE DATABASE db1;
+Database	Create Database
+db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET cp1251 */
+SHOW CREATE DATABASE db2;
+Database	Create Database
+db2	CREATE DATABASE `db2` /*!40100 DEFAULT CHARACTER SET latin5 */
+DROP DATABASE db2;
+USE db1;
+CREATE TABLE t1 (a char(10));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` char(10) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=cp1251
+DROP TABLE t1;
+DROP DATABASE db1;

mysql-test/t/ctype_create.test

+#
+# Test for various CREATE statements and character sets
+#
+
+
+# Check that the database charset is taken from server charset by default:
+# - Change local character_set_server variable to latin5.
+# - Create database with and without CHARACTER SET specification.
+# At the same time check fix for the
+# Bug#2151:
+# "USE db" with non-default character set should never affect 
+# further CREATE DATABASEs.
+
+
+SET @@character_set_server=latin5;
+CREATE DATABASE db1 DEFAULT CHARACTER SET cp1251;
+USE db1;
+CREATE DATABASE db2;
+
+#
+# This should be cp1251
+#
+SHOW CREATE DATABASE db1;
+
+#
+# This should take the default latin5 value from server level.
+#
+SHOW CREATE DATABASE db2;
+DROP DATABASE db2;
+
+#
+# Check that table value uses database level by default
+#
+USE db1;
+CREATE TABLE t1 (a char(10));
+SHOW CREATE TABLE t1;
+
+DROP TABLE t1;
+DROP DATABASE db1;

mysys/charset2html.c

@@ -81,7 +81,7 @@ static void print_cs(CHARSET_INFO *cs)
     printf("<TR bgcolor=#%s>",clr ? "DDDDDD" : "EEEE99");
     printf("<TD>%02X",ch[i].cod);
     printf("<TD>%04X",ch[i].uni);
-    printf("<TD>%d",ch[i].srt);
+    printf("<TD>%02X",ch[i].srt);
     
     printf("<TD>%s%s%s%s%s%s%s%s",
     		ch[i].ctp & _U ? "U" : "",

sql/sql_db.cc

@@ -62,7 +62,7 @@ static bool write_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create)
     ulong length;
     CHARSET_INFO *cs= (create && create->default_table_charset) ? 
 		     create->default_table_charset :
-		     thd->variables.collation_database;
+		     thd->variables.collation_server;
     length= my_sprintf(buf,(buf,
 			    "default-character-set=%s\ndefault-collation=%s\n",
 			    cs->csname,cs->name));
@@ -101,7 +101,7 @@ static bool load_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create)
   uint nbytes;
 
   bzero((char*) create,sizeof(*create));
-  create->default_table_charset= global_system_variables.collation_database;
+  create->default_table_charset= thd->variables.collation_server;
   if ((file=my_open(path, O_RDONLY | O_SHARE, MYF(0))) >= 0)
   {
     IO_CACHE cache;
@@ -290,7 +290,7 @@ int mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create_info)
   {
     thd->db_charset= (create_info && create_info->default_table_charset) ?
 		     create_info->default_table_charset : 
-		     global_system_variables.collation_database;
+		     thd->variables.collation_server;
     thd->variables.collation_database= thd->db_charset;
   }
 
@@ -663,7 +663,7 @@ bool mysql_change_db(THD *thd, const char *name)
   load_db_opt(thd, path, &create);
   thd->db_charset= create.default_table_charset ?
 		   create.default_table_charset :
-		   global_system_variables.collation_database;
+		   thd->variables.collation_server;
   thd->variables.collation_database= thd->db_charset;
   DBUG_RETURN(0);
 }