BUG#14157: utf8 encoding in binlog without set character_set_client e.g DROP temporary

Binlog lacks encoding info about DROPped temporary table.

Idea of the fix is to switch temporary to system_charset_info when a temporary table
is DROPped for binlog. Since that is the server, that automatically, but not the client, who generates the query
the binlog should be updated on the server's encoding for the coming DROP.
The `write_binlog_with_system_charset()' is introduced to replace similar problematic places in the code.

mysql-test/r/drop_temp_table.result

@@ -17,6 +17,7 @@ master-bin.000001	#	Query	1	#	create database `drop-temp+table-test`
 master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; create temporary table shortn1 (a int)
 master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; create temporary table `table:name` (a int)
 master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; create temporary table shortn2 (a int)
+master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; SET ONE_SHOT CHARACTER_SET_CLIENT=33,COLLATION_CONNECTION=8,COLLATION_DATABASE=8,COLLATION_SERVER=8
 master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `drop-temp+table-test`.`shortn2`,`drop-temp+table-test`.`table:name`,`drop-temp+table-test`.`shortn1`
 master-bin.000001	#	Query	1	#	use `drop-temp+table-test`; DO RELEASE_LOCK("a")
 drop database `drop-temp+table-test`;

mysql-test/r/mix_innodb_myisam_binlog.result

@@ -249,7 +249,8 @@ master-bin.000001	1056	Query	1	1056	use `test`; insert t0 select * from t1
 master-bin.000001	1117	Query	1	1117	use `test`; DO RELEASE_LOCK("a")
 master-bin.000001	1172	Query	1	1172	use `test`; insert into t0 select GET_LOCK("lock1",null)
 master-bin.000001	1251	Query	1	1251	use `test`; create table t2 (n int) engine=innodb
-master-bin.000001	1323	Query	1	1323	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `test`.`t1`,`test`.`ti`
-master-bin.000001	1424	Query	1	1424	use `test`; DO RELEASE_LOCK("lock1")
+master-bin.000001	1323	Query	1	1323	use `test`; SET ONE_SHOT CHARACTER_SET_CLIENT=33,COLLATION_CONNECTION=8,COLLATION_DATABASE=8,COLLATION_SERVER=8
+master-bin.000001	1457	Query	1	1457	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `test`.`t1`,`test`.`ti`
+master-bin.000001	1558	Query	1	1558	use `test`; DO RELEASE_LOCK("lock1")
 do release_lock("lock1");
 drop table t0,t2;

mysql-test/r/mysqlbinlog.result

@@ -101,4 +101,9 @@ HEX(f)
 select HEX(f) from t4;
 HEX(f)
 835C
-drop table t1, t2, t03, t04, t3, t4;
+flush logs;
+select * from t5  /* must be (1),(1) */;
+a
+1
+1
+drop table t1, t2, t03, t04, t3, t4, t5;

mysql-test/r/rpl_temporary.result

@@ -103,3 +103,7 @@ select * from t1 /* must be 1 */;
 f
 1
 drop table t1;
+select * from t1;
+a
+1
+drop table t1;

mysql-test/t/mysqlbinlog.test

@@ -114,8 +114,17 @@ select HEX(f) from t3;
 select HEX(f) from t04;
 select HEX(f) from t4;
 
+#
+#14157: utf8 encoding in binlog without set character_set_client
+#
+flush logs;
+--exec $MYSQL --default-character-set=koi8r test -e 'create table if not exists t5 (a int); set names koi8r; create temporary table `    ` (a int); insert into `    ` values (1); insert into t5 select * from `    `'
+
+# resulted log is client charset insensitive (latin1 not koi8r) as it must be
+--exec $MYSQL_BINLOG --short-form $MYSQL_TEST_DIR/var/log/master-bin.000006 | $MYSQL --default-character-set=latin1
+select * from t5  /* must be (1),(1) */;
 
 # clean up
-drop table t1, t2, t03, t04, t3, t4; 
+drop table t1, t2, t03, t04, t3, t4, t5; 
 
 # End of 4.1 tests

mysql-test/t/rpl_temporary.test

@@ -156,4 +156,16 @@ select * from t1 /* must be 1 */;
 connection master; 
 drop table t1;
 
+#
+#14157: utf8 encoding in binlog without set character_set_client
+#
+--exec $MYSQL --default-character-set=koi8r test -e 'create table t1 (a int); set names koi8r; create temporary table `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` (a int); insert into `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` values (1); insert into t1 select * from `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ`'
+
+sync_slave_with_master;
+#connection slave;
+select * from t1;
+
+connection master; 
+drop table t1;
+
 # End of 4.1 tests

sql/mysql_priv.h

@@ -1275,6 +1275,13 @@ inline int hexchar_to_int(char c)
   return -1;
 }
 
+inline void write_binlog_with_system_charset(THD * thd, Query_log_event * qinfo)
+{
+  CHARSET_INFO * cs_save= thd->variables.character_set_client;
+  thd->variables.character_set_client= system_charset_info;
+  mysql_bin_log.write(qinfo);
+  thd->variables.character_set_client= cs_save;
+}
 
 /*
   Some functions that are different in the embedded library and the normal

sql/sql_base.cc

@@ -615,7 +615,7 @@ void close_temporary_tables(THD *thd)
         rightfully causing the slave to stop.
       */
       qinfo.error_code= 0;
-      mysql_bin_log.write(&qinfo);
+      write_binlog_with_system_charset(thd, &qinfo);
     }
     else 
     {