Bug#32435:

DROP DATABASE statement writes changes to mysql.proc table under RBR

When replicating a DROP DATABASE statement with a database holding
stored procedures, the changes to the mysql.proc table was recorded
in the binary log under row-based replication.

With this patch, the thread uses statement-logging format for the
duration of the DROP DATABASE statement. The logging format is
(already) reset at the end of the statement, so no additional code
for resetting the logging format is necessary.

mysql-test/extra/binlog_tests/database.test

+source include/have_log_bin.inc;
+source include/not_embedded.inc;
+
+# Checking that the drop of a database does not replicate anything in
+# addition to the drop of the database
+
+reset master;
+create database testing_1;
+use testing_1;
+create table t1 (a int);
+create function sf1 (a int) returns int return a+1;
+create trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a);
+create procedure sp1 (a int) insert into t1 values(a);
+drop database testing_1;
+source include/show_binlog_events.inc;

mysql-test/suite/binlog/r/binlog_database.result

+set binlog_format=statement;
+reset master;
+create database testing_1;
+use testing_1;
+create table t1 (a int);
+create function sf1 (a int) returns int return a+1;
+create trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a);
+create procedure sp1 (a int) insert into t1 values(a);
+drop database testing_1;
+show binlog events from <binlog_start>;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Query	#	#	create database testing_1
+master-bin.000001	#	Query	#	#	use `testing_1`; create table t1 (a int)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` function sf1 (a int) returns int return a+1
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` procedure sp1 (a int) insert into t1 values(a)
+master-bin.000001	#	Query	#	#	drop database testing_1
+set binlog_format=mixed;
+reset master;
+create database testing_1;
+use testing_1;
+create table t1 (a int);
+create function sf1 (a int) returns int return a+1;
+create trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a);
+create procedure sp1 (a int) insert into t1 values(a);
+drop database testing_1;
+show binlog events from <binlog_start>;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Query	#	#	create database testing_1
+master-bin.000001	#	Query	#	#	use `testing_1`; create table t1 (a int)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` function sf1 (a int) returns int return a+1
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` procedure sp1 (a int) insert into t1 values(a)
+master-bin.000001	#	Query	#	#	drop database testing_1
+set binlog_format=row;
+reset master;
+create database testing_1;
+use testing_1;
+create table t1 (a int);
+create function sf1 (a int) returns int return a+1;
+create trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a);
+create procedure sp1 (a int) insert into t1 values(a);
+drop database testing_1;
+show binlog events from <binlog_start>;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Query	#	#	create database testing_1
+master-bin.000001	#	Query	#	#	use `testing_1`; create table t1 (a int)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` function sf1 (a int) returns int return a+1
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` trigger tr1 before insert on t1 for each row insert into t2 values (2*new.a)
+master-bin.000001	#	Query	#	#	use `testing_1`; CREATE DEFINER=`root`@`localhost` procedure sp1 (a int) insert into t1 values(a)
+master-bin.000001	#	Query	#	#	drop database testing_1
+show databases;
+Database
+information_schema
+mysql
+test

mysql-test/suite/binlog/t/binlog_database.test

+# A wrapper to test that dropping a database is binlogged
+# correctly. We test all three modes in the same file to avoid
+# unecessary server restarts.
+
+set binlog_format=statement;
+source extra/binlog_tests/database.test;
+set binlog_format=mixed;
+source extra/binlog_tests/database.test;
+set binlog_format=row;
+source extra/binlog_tests/database.test;
+
+show databases;

sql/sql_db.cc

@@ -883,6 +883,13 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
 
   VOID(pthread_mutex_lock(&LOCK_mysql_create_db));
 
+  /*
+    This statement will be replicated as a statement, even when using
+    row-based replication. The flag will be reset at the end of the
+    statement.
+  */
+  thd->clear_current_stmt_binlog_row_based();
+
   length= build_table_filename(path, sizeof(path), db, "", "", 0);
   strmov(path+length, MY_DB_OPT_FILE);		// Append db option file name
   del_dbopt(path);				// Remove dboption hash entry