BUG#53075 SBR: Strange warning around CONNECTION_ID

Statements with CONNECTION_ID were forced to be kept in the transactional
cache and by consequence non-transactional changes that were supposed to
be flushed ahead of the transaction were kept in the transactional cache.

This happened because after BUG#51894 any statement whose thd's
thread_specific_used was set was kept in the transactional cache. The idea
was to keep changes on temporary tables in the transactional cache. However,
the thread_specific_used was set not only for statements that accessed
temporary tables but also when the CONNECTION_ID was used.

To fix the problem, we created a new variable to keep track of updates
to temporary tables.


mysql-test/suite/rpl/r/rpl_temp_temporary.result:
  Added a test case.
mysql-test/suite/rpl/t/rpl_temp_temporary.test:
  Added a test case.
sql/log_event.cc:
  Uses the thread_temporary_used to decide if a statement should
  be kept in the transactional cache or not.
sql/sql_class.cc:
  Sets the thread_temporary_used while calling the decide_logging_format.
sql/sql_class.h:
  Defines the thread_temporary_used.
sql/sql_parse.cc:
  Resets the thread_temporary_used.

mysql-test/suite/rpl/r/rpl_temp_temporary.result

@@ -174,6 +174,48 @@ master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Query	#	#	use `test`; DROP TEMPORARY TABLE IF EXISTS `tmp2` /* generated by server */
 master-bin.000001	#	Query	#	#	use `test`; DROP TEMPORARY TABLE IF EXISTS `tmp3` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
+########################################################################
+#                          VERIFY ITEM 7
+########################################################################
+SET BINLOG_FORMAT=STATEMENT;
+CREATE TEMPORARY TABLE tmp1(id int) engine= MyIsam;
+CREATE TABLE t_myisam (f1 BIGINT) ENGINE = MyISAM;
+CREATE TABLE t_innodb (f1 BIGINT) ENGINE = Innodb;
+BEGIN;
+INSERT INTO t_myisam VALUES(CONNECTION_ID());
+INSERT INTO tmp1 VALUES(1);
+INSERT INTO t_myisam VALUES(1);
+Warnings:
+Note	1592	Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Non-transactional reads or writes are unsafe if they occur after transactional reads or writes inside a transaction.
+INSERT INTO t_innodb VALUES(1);
+INSERT INTO t_myisam VALUES(CONNECTION_ID());
+Warnings:
+Note	1592	Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Non-transactional reads or writes are unsafe if they occur after transactional reads or writes inside a transaction.
+INSERT INTO t_innodb VALUES(1);
+COMMIT;
+DROP TABLE t_myisam;
+DROP TABLE t_innodb;
+show binlog events from <binlog_start>;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Query	#	#	use `test`; CREATE TEMPORARY TABLE tmp1(id int) engine= MyIsam
+master-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t_myisam (f1 BIGINT) ENGINE = MyISAM
+master-bin.000001	#	Query	#	#	use `test`; CREATE TABLE t_innodb (f1 BIGINT) ENGINE = Innodb
+master-bin.000001	#	Query	#	#	BEGIN
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO t_myisam VALUES(CONNECTION_ID())
+master-bin.000001	#	Query	#	#	COMMIT
+master-bin.000001	#	Query	#	#	BEGIN
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO t_myisam VALUES(1)
+master-bin.000001	#	Query	#	#	COMMIT
+master-bin.000001	#	Query	#	#	BEGIN
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO t_myisam VALUES(CONNECTION_ID())
+master-bin.000001	#	Query	#	#	COMMIT
+master-bin.000001	#	Query	#	#	BEGIN
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO tmp1 VALUES(1)
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO t_innodb VALUES(1)
+master-bin.000001	#	Query	#	#	use `test`; INSERT INTO t_innodb VALUES(1)
+master-bin.000001	#	Xid	#	#	COMMIT /* XID */
+master-bin.000001	#	Query	#	#	use `test`; DROP TABLE t_myisam
+master-bin.000001	#	Query	#	#	use `test`; DROP TABLE t_innodb
 ###################################################################################
 #                               CHECK CONSISTENCY
 ###################################################################################

mysql-test/suite/rpl/t/rpl_temp_temporary.test

@@ -34,6 +34,10 @@
 # the CREATE TEMPORARY is not logged and the DROP TEMPORARY is extended with
 # the IF EXISTS clause.
 #
+# 7 - It also verifies if the CONNECTION_ID along with a non-transactional
+# table is written outside the transaction boundaries and is not classified
+# as unsafe. See BUG#53075.
+#
 ################################################################################
 
 source include/master-slave.inc;
@@ -163,6 +167,29 @@ DROP TEMPORARY TABLE tmp3;
 ROLLBACK;
 source include/show_binlog_events.inc;
 
+--echo ########################################################################
+--echo #                          VERIFY ITEM 7
+--echo ########################################################################
+
+SET BINLOG_FORMAT=STATEMENT;
+let $binlog_start= query_get_value("SHOW MASTER STATUS", Position, 1);
+
+CREATE TEMPORARY TABLE tmp1(id int) engine= MyIsam;
+CREATE TABLE t_myisam (f1 BIGINT) ENGINE = MyISAM;
+CREATE TABLE t_innodb (f1 BIGINT) ENGINE = Innodb;
+
+BEGIN;
+INSERT INTO t_myisam VALUES(CONNECTION_ID());
+INSERT INTO tmp1 VALUES(1);
+INSERT INTO t_myisam VALUES(1);
+INSERT INTO t_innodb VALUES(1);
+INSERT INTO t_myisam VALUES(CONNECTION_ID());
+INSERT INTO t_innodb VALUES(1);
+COMMIT;
+DROP TABLE t_myisam;
+DROP TABLE t_innodb;
+source include/show_binlog_events.inc;
+
 --echo ###################################################################################
 --echo #                               CHECK CONSISTENCY
 --echo ###################################################################################
@@ -172,3 +199,5 @@ sync_slave_with_master;
 --exec $MYSQL_DUMP --compact --order-by-primary --skip-extended-insert --no-create-info test > $MYSQLTEST_VARDIR/tmp/test-nmt-master.sql
 --exec $MYSQL_DUMP_SLAVE --compact --order-by-primary --skip-extended-insert --no-create-info test > $MYSQLTEST_VARDIR/tmp/test-nmt-slave.sql
 --diff_files $MYSQLTEST_VARDIR/tmp/test-nmt-master.sql $MYSQLTEST_VARDIR/tmp/test-nmt-slave.sql
+
+

sql/log_event.cc

@@ -679,7 +679,7 @@ Log_event::Log_event(THD* thd_arg, uint16 flags_arg, bool using_trans)
   server_id=	thd->server_id;
   when=		thd->start_time;
   cache_type= (using_trans || stmt_has_updated_trans_table(thd)
-               || thd->thread_specific_used
+               || thd->thread_temporary_used
                ? Log_event::EVENT_TRANSACTIONAL_CACHE :
                Log_event::EVENT_STMT_CACHE);
 }
@@ -2553,7 +2553,7 @@ Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
   else
   {
     cache_type= ((using_trans || stmt_has_updated_trans_table(thd) ||
-                 force_trans || thd->thread_specific_used)
+                 force_trans || thd->thread_temporary_used)
                  ? Log_event::EVENT_TRANSACTIONAL_CACHE :
                  Log_event::EVENT_STMT_CACHE);
   }

sql/sql_class.cc

@@ -3736,6 +3736,7 @@ int THD::decide_logging_format(TABLE_LIST *tables)
         trans_non_trans_access_engines= (prev_trans != act_trans);
         multi_access_engine= TRUE;
       }
+      thread_temporary_used |= table->table->s->tmp_table;
       prev_access_table= table->table;
     }
 

sql/sql_class.h

@@ -2108,6 +2108,11 @@ public:
   
   /**  is set if some thread specific value(s) used in a statement. */
   bool       thread_specific_used;
+  /**  
+    is set if a statement accesses a temporary table created through
+    CREATE TEMPORARY TABLE. 
+  */
+  bool       thread_temporary_used;
   bool	     charset_is_system_charset, charset_is_collation_connection;
   bool       charset_is_character_set_filesystem;
   bool       enable_slow_log;   /* enable slow log for current statement */

sql/sql_parse.cc

@@ -5530,7 +5530,7 @@ void THD::reset_for_next_command()
     thd->transaction.all.modified_non_trans_table= FALSE;
   }
   DBUG_ASSERT(thd->security_ctx== &thd->main_security_ctx);
-  thd->thread_specific_used= FALSE;
+  thd->thread_specific_used= thd->thread_temporary_used= FALSE;
 
   if (opt_bin_log)
   {