Bug #38773: DROP DATABASE cause switch to stmt-mode when there are temporary tables open

When executing a DROP DATABASE statement in ROW mode and having temporary
tables open at the same time, the existance of temporary tables prevent
the server from switching back to row mode after temporarily switching to
statement mode to handle the logging of the statement.

Fixed the problem by removing the code to switch to statement mode and added
code to temporarily disable the binary log while dropping the objects in the
database.

mysql-test/extra/binlog_tests/database.test:
  Added test to ensure that DROP DATABASE does not affect the replication mode.
mysql-test/suite/binlog/r/binlog_database.result:
  Result file change.
sql/sql_db.cc:
  Removed code that clears the current_stmt_binlog_row_based flag.
  Added code to disable the binary log while dropping the objects
  in a database.

1 files changed, 15 insertions, 0 deletions

diff --git a/mysql-test/extra/binlog_tests/database.test b/mysql-test/extra/binlog_tests/database.test
index 11a8f53a6d7..2e445f98adf 100644
--- a/mysql-test/extra/binlog_tests/database.test
+++ b/mysql-test/extra/binlog_tests/database.test
@@ -13,3 +13,18 @@ create trigger tr1 before insert on t1 for each row insert into t2 values (2*new
 create procedure sp1 (a int) insert into t1 values(a);
 drop database testing_1;
 source include/show_binlog_events.inc;
+
+# BUG#38773: DROP DATABASE cause switch to stmt-mode when there are
+# temporary tables open
+
+use test;
+reset master;
+create temporary table tt1 (a int);
+create table t1 (a int);
+insert into t1 values (1);
+disable_warnings;
+drop database if exists mysqltest1;
+enable_warnings;
+insert into t1 values (1);
+drop table tt1, t1;
+source include/show_binlog_events.inc;