MDEV-20091 DROP TEMPORARY table is logged despite no CREATE was logged

MDEV-5589 commit set up a policy to skip DROP TEMPORARY TABLE binary logging
in case the target table has not been "CREATEed" in binlog (no CREATE
Query-log-event was logged into the binary log).

It turns out that

1. the rule did not cover non-existing table DROPped with IF-EXISTS clause.
   The logged-create knowledge for the non-existing one does not even need
   MDEV-5589 patch, and

2. connection close disobeys it to trigger automatic DROP-IF-EXISTS
   binlogging.

Either 1 or 2 or even both is/are also responsible for unexpected binlog
records observed in MDEV-17863, actually rendering a referred
@@global.read_only irrelevant as far as the described stored procedure
definition *and* the ROW binlog-format are concerned.

mysql-test/extra/binlog_tests/drop_temp_table.test

@@ -14,12 +14,8 @@ CREATE TEMPORARY TABLE `table:name` (a INT);
 CREATE TEMPORARY TABLE shortn2 (a INT);
 
 ##############################################################################
-# BUG#46572 DROP TEMPORARY table IF EXISTS does not have a consistent behavior
-# in ROW mode 
-# 
-# In RBR, 'DROP TEMPORARY TABLE ...' statement should never be binlogged no
-# matter if the tables exist or not. In contrast, both in SBR and MBR, the
-# statement should be always binlogged no matter if the tables exist or not.
+# MDEV-20091: DROP TEMPORARY TABLE IF EXISTS statements will be written
+#             to binlog only if the corresponding temporary table exists.
 ##############################################################################
 CREATE TEMPORARY TABLE tmp(c1 int);
 CREATE TEMPORARY TABLE tmp1(c1 int);
@@ -30,12 +26,12 @@ CREATE TABLE t(c1 int);
 DROP TEMPORARY TABLE IF EXISTS tmp;
 
 --disable_warnings
-# Before fixing BUG#46572, 'DROP TEMPORARY TABLE IF EXISTS...' statement was
-# binlogged when the table did not exist in RBR.
+# Post MDEV-20091: Following DROP TEMPORARY TABLE statement should not be
+# logged as the table is already dropped above.
 DROP TEMPORARY TABLE IF EXISTS tmp;
 
-# In RBR, 'DROP TEMPORARY TABLE ...' statement is never binlogged no matter if
-# the tables exist or not.
+# Post MDEV-20091: Only DROP TEMPORARY TABLE statement should be written only
+# for 'tmp1' table.
 DROP TEMPORARY TABLE IF EXISTS tmp, tmp1;
 DROP TEMPORARY TABLE tmp3;
 
@@ -79,6 +75,12 @@ DROP DATABASE `drop-temp+table-test`;
 # if there are open temporary tables. As such the implicit drop
 # for temporary tables on session closing must be logged.
 #
+# MDEV-20091: DROP TEMPORARY TABLE IF EXISTS statements will be written to
+# binlog only if the corresponding temporary table exists. In row based
+# replication temporary tables are not replicated hence their corresponding
+# DROP TEMPORARY TABLE statement will be not be written to binary log upon
+# session closure.
+#
 
 RESET MASTER;
 
@@ -92,8 +94,10 @@ SELECT @@session.binlog_format;
 --disconnect con1
 
 -- connection default
+if (!`SELECT @@BINLOG_FORMAT = 'ROW'`) {
 --let $wait_binlog_event= DROP
 --source include/wait_for_binlog_event.inc
+}
 -- source include/show_binlog_events.inc
 RESET MASTER;
 

mysql-test/extra/rpl_tests/rpl_drop_create_temp_table.test

@@ -32,6 +32,10 @@
 #                     is any
 # Drop-Temp-TT-Temp - Drops two temporary T-tables if there is any
 # Drop-Temp-NN-Temp - Drops two temporary N-tables if there is any
+#
+# Note: MDEV-20091: DROP TEMPORARY TABLE IF EXISTS statements will be written
+#                   to binlog only if the corresponding temporary table exists.
+#
 # Drop-Temp-Xe-Temp - Tries to drop a temporary table that does not exist
 # Drop-Temp-NXe-Temp - Drops a temporary N-table if there is any and
 #                      a temporary table that does not exist

mysql-test/include/binlog_parallel_replication_marks.test

@@ -49,9 +49,16 @@ connection default;
 
 # We need to wait for the implicit DROP TEMPORARY TABLE to be logged after
 # tmp_con disconnect, otherwise we get sporadic test failures.
+# MDEV-20091: DROP TEMPORARY TABLE IF EXISTS statements will be written to
+# binlog only if the corresponding temporary table exists. In row based
+# replication temporary tables are not replicated hence their corresponding
+# DROP TEMPORARY TABLE statement will be not be written to binary log upon
+# session closure.
+
+if (!`SELECT @@BINLOG_FORMAT = 'ROW'`) {
 --let $wait_condition= SELECT variable_value > $before_drop_pos FROM information_schema.global_status WHERE variable_name = 'binlog_snapshot_position'
 --source include/wait_condition.inc
-
+}
 --let $binlog_pos2=query_get_value(SHOW MASTER STATUS, Position, 1)
 
 --let $binlog_file= query_get_value(SHOW MASTER STATUS, File, 1)

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

@@ -89,6 +89,4 @@ BEGIN
 # server id 1  end_log_pos # 	Table_map: `test`.`t1` mapped to number #
 # server id 1  end_log_pos # 	Write_rows: table id # flags: STMT_END_F
 COMMIT/*!*/;
-# server id 1  end_log_pos # 	GTID #-#-# ddl
-DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `t5`
 DROP TABLE t1;

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

@@ -30,15 +30,9 @@ master-bin.000001	#	Query	#	#	CREATE DATABASE `drop-temp+table-test`
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; CREATE TABLE t(c1 int)
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp` /* generated by server */
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp` /* generated by server */
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; DROP TABLE IF EXISTS `t` /* generated by server */
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; DROP TABLE IF EXISTS `tmp2`,`t` /* generated by server */
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `shortn2`,`table:name`,`shortn1`
 DROP DATABASE `drop-temp+table-test`;
 RESET MASTER;
 CREATE TABLE t1 ( i text );
@@ -56,7 +50,5 @@ master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
 master-bin.000001	#	Query	#	#	COMMIT
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `ttmp1`
 RESET MASTER;
 DROP TABLE t1;

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

@@ -303,8 +303,6 @@ master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
 master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; create table t2 (n int) engine=innodb
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `t1`,`ti`
 do release_lock("lock1");
 drop table t0,t2;
 set autocommit=0;

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

@@ -46,12 +46,8 @@ master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; CREATE TABLE t(c1 int)
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp` /* generated by server */
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp` /* generated by server */
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp1` /* generated by server */
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp` /* generated by server */
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `drop-temp+table-test`; DROP TEMPORARY TABLE `tmp3` /* generated by server */
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `drop-temp+table-test`.`tmp2` /* generated by server */

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

@@ -238,6 +238,13 @@ set binlog_format="STATEMENT";
 ERROR HY000: Cannot switch out of the row-based binary log format when the session has open temporary tables
 drop temporary table t8;
 set @@binlog_format=@org_binlog_format;
+set @@session.binlog_format=default;
+drop temporary table if exists t9;
+Warnings:
+Note	1051	Unknown table 'test.t9'
+set session binlog_format=default;
+create temporary table t9 (i int);
+*** Must be no DROP logged for t9 when there was no CREATE, at disconnect too ***
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
@@ -248,5 +255,9 @@ master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; create temporary table t7 (a int)
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`t7` /* generated by server */
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; create temporary table t9 (i int)
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `t9`
 drop table t2;
 include/rpl_end.inc

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

@@ -260,6 +260,13 @@ set binlog_format="STATEMENT";
 ERROR HY000: Cannot switch out of the row-based binary log format when the session has open temporary tables
 drop temporary table t8;
 set @@binlog_format=@org_binlog_format;
+set @@session.binlog_format=default;
+drop temporary table if exists t9;
+Warnings:
+Note	1051	Unknown table 'test.t9'
+set session binlog_format=default;
+create temporary table t9 (i int);
+*** Must be no DROP logged for t9 when there was no CREATE, at disconnect too ***
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	GTID #-#-#

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

@@ -230,6 +230,13 @@ set binlog_format="STATEMENT";
 ERROR HY000: Cannot switch out of the row-based binary log format when the session has open temporary tables
 drop temporary table t8;
 set @@binlog_format=@org_binlog_format;
+set @@session.binlog_format=default;
+drop temporary table if exists t9;
+Warnings:
+Note	1051	Unknown table 'test.t9'
+set session binlog_format=default;
+create temporary table t9 (i int);
+*** Must be no DROP logged for t9 when there was no CREATE, at disconnect too ***
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
@@ -240,5 +247,9 @@ master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; create temporary table t7 (a int)
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`t7` /* generated by server */
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; create temporary table t9 (i int)
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `t9`
 drop table t2;
 include/rpl_end.inc

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

@@ -83,9 +83,6 @@ Warnings:
 Note	1051	Unknown table 'test.tt_xx_1'
 -b-b-b-b-b-b-b-b-b-b-b- >> Drop-Temp-If-Xe-Temp << -b-b-b-b-b-b-b-b-b-b-b-
 include/show_binlog_events.inc
-Log_name	Pos	Event_type	Server_id	End_log_pos	Info
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
 -e-e-e-e-e-e-e-e-e-e-e- >> Drop-Temp-If-Xe-Temp << -e-e-e-e-e-e-e-e-e-e-e-
 
 SET @commands= 'Drop-Temp-TXe-Temp';
@@ -101,9 +98,6 @@ Warnings:
 Note	1051	Unknown table 'test.tt_1'
 -b-b-b-b-b-b-b-b-b-b-b- >> Drop-Temp-If-TXe-Temp << -b-b-b-b-b-b-b-b-b-b-b-
 include/show_binlog_events.inc
-Log_name	Pos	Event_type	Server_id	End_log_pos	Info
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 -e-e-e-e-e-e-e-e-e-e-e- >> Drop-Temp-If-TXe-Temp << -e-e-e-e-e-e-e-e-e-e-e-
 
 SET @commands= 'Drop-Temp-NXe-Temp';
@@ -119,9 +113,6 @@ Warnings:
 Note	1051	Unknown table 'test.tt_1'
 -b-b-b-b-b-b-b-b-b-b-b- >> Drop-Temp-If-NXe-Temp << -b-b-b-b-b-b-b-b-b-b-b-
 include/show_binlog_events.inc
-Log_name	Pos	Event_type	Server_id	End_log_pos	Info
-master-bin.000001	#	Gtid	#	#	GTID #-#-#
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 -e-e-e-e-e-e-e-e-e-e-e- >> Drop-Temp-If-NXe-Temp << -e-e-e-e-e-e-e-e-e-e-e-
 
 SET @commands= 'Drop-Temp-TN-Temp';
@@ -264,7 +255,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-Xe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -289,8 +279,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-Xe-Temp N Drop-Temp-If-Xe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -344,7 +332,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-TXe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -369,8 +356,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-TXe-Temp N Drop-Temp-If-TXe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -424,7 +409,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-NXe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -449,8 +433,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-NXe-Temp N Drop-Temp-If-NXe-Temp C << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -755,7 +737,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-Xe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -782,8 +763,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_xx_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-Xe-Temp N Drop-Temp-If-Xe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -839,7 +818,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-TXe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -866,8 +844,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-TXe-Temp N Drop-Temp-If-TXe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -923,7 +899,6 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-NXe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 
@@ -950,8 +925,6 @@ master-bin.000001	#	Query	#	#	COMMIT
 master-bin.000001	#	Gtid	#	#	BEGIN GTID #-#-#
 master-bin.000001	#	Table_map	#	#	table_id: # (test.tt_xx_1)
 master-bin.000001	#	Write_rows_v1	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
-master-bin.000001	#	Query	#	#	DROP TEMPORARY TABLE IF EXISTS `test`.`tt_1` /* generated by server */
 master-bin.000001	#	Query	#	#	ROLLBACK
 -e-e-e-e-e-e-e-e-e-e-e- >> B T Drop-Temp-If-NXe-Temp N Drop-Temp-If-NXe-Temp R << -e-e-e-e-e-e-e-e-e-e-e-
 

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

+include/master-slave.inc
+[connection master]
+[connection slave]
+SET GLOBAL read_only=1;
+[connection master]
+CREATE PROCEDURE testproc()
+BEGIN
+DROP TEMPORARY TABLE IF EXISTS t1_tmp;
+DROP TEMPORARY TABLE IF EXISTS t2_tmp;
+CREATE TEMPORARY TABLE IF NOT EXISTS t1_tmp ( t1 varchar(400) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+CREATE TEMPORARY TABLE IF NOT EXISTS t2_tmp ( t2 varchar(16) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+END|
+SET GLOBAL read_only=1;
+CALL testproc();
+******** None of the above DROP TEMPORARY TABLE statement should be found in binary log ********
+include/show_binlog_events.inc
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; CREATE DEFINER=`root`@`localhost` PROCEDURE `testproc`()
+BEGIN
+DROP TEMPORARY TABLE IF EXISTS t1_tmp;
+DROP TEMPORARY TABLE IF EXISTS t2_tmp;
+CREATE TEMPORARY TABLE IF NOT EXISTS t1_tmp ( t1 varchar(400) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+CREATE TEMPORARY TABLE IF NOT EXISTS t2_tmp ( t2 varchar(16) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+END
+SELECT @@read_only;
+@@read_only
+1
+======== CLEAN UP =========
+[connection master]
+DROP TEMPORARY TABLE t1_tmp;
+DROP TEMPORARY TABLE t2_tmp;
+DROP PROCEDURE testproc;
+SET GLOBAL read_only=0;
+SET GLOBAL read_only=0;
+include/rpl_end.inc

mysql-test/suite/rpl/t/create_or_replace.inc

@@ -205,6 +205,19 @@ set binlog_format="STATEMENT";
 drop temporary table t8;
 set @@binlog_format=@org_binlog_format;
 
+# MDEV-20091:
+# 1. No DROP should be logged for non-existing tmp table, nor
+# 2. at the connection close when its creation has not been logged.
+set @@session.binlog_format=default;
+drop temporary table if exists t9;
+
+--connect(con1,localhost,root,,)
+set session binlog_format=default;
+create temporary table t9 (i int);
+--echo *** Must be no DROP logged for t9 when there was no CREATE, at disconnect too ***
+--disconnect con1
+
+--connection server_1
 --source include/show_binlog_events.inc
 
 # Clean up

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

+# ==== Purpose ====
+#
+# Test verifies that plain DROP TEMPORARY TABLE IF EXISTS statements are not
+# replicated during row based replication.
+#
+# ==== Implementation ====
+#
+# Steps:
+#    0 - Have a read_only master and slave. Binlog format should be "ROW".
+#    1 - Create a procedure which executes DROP TEMPORARY TABLE IF EXISTS
+#        statements prior to CREATE TEMPORARY TABLE.
+#    2 - Execute the procedure.
+#    3 - Verify that the DROP TEMPORARY TABLE IF EXISTS statements within the
+#        procedure are not written to the binary log.
+#
+# ==== References ====
+#
+# MDEV-20091: DROP TEMPORARY table is logged despite no CREATE was logged
+#
+
+--source include/have_binlog_format_row.inc
+--source include/have_innodb.inc
+--source include/master-slave.inc
+
+--source include/rpl_connection_slave.inc
+SET GLOBAL read_only=1;
+
+--source include/rpl_connection_master.inc
+DELIMITER |;
+CREATE PROCEDURE testproc()
+BEGIN
+   DROP TEMPORARY TABLE IF EXISTS t1_tmp;
+   DROP TEMPORARY TABLE IF EXISTS t2_tmp;
+   CREATE TEMPORARY TABLE IF NOT EXISTS t1_tmp ( t1 varchar(400) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+   CREATE TEMPORARY TABLE IF NOT EXISTS t2_tmp ( t2 varchar(16) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+END|
+DELIMITER ;|
+SET GLOBAL read_only=1;
+CALL testproc();
+--echo ******** None of the above DROP TEMPORARY TABLE statement should be found in binary log ********
+--source include/show_binlog_events.inc
+--sync_slave_with_master
+SELECT @@read_only;
+
+--echo ======== CLEAN UP =========
+--source include/rpl_connection_master.inc
+DROP TEMPORARY TABLE t1_tmp;
+DROP TEMPORARY TABLE t2_tmp;
+DROP PROCEDURE testproc;
+SET GLOBAL read_only=0;
+--sync_slave_with_master
+SET GLOBAL read_only=0;
+
+--source include/rpl_end.inc

sql/sql_base.cc

@@ -1205,7 +1205,7 @@ bool close_temporary_tables(THD *thd)
       my_thread_id save_pseudo_thread_id= thd->variables.pseudo_thread_id;
       char db_buf[FN_REFLEN];
       String db(db_buf, sizeof(db_buf), system_charset_info);
-
+      bool at_least_one_create_logged;
       /* Set pseudo_thread_id to be that of the processed table */
       thd->variables.pseudo_thread_id= tmpkeyval(thd, table);
 
@@ -1217,13 +1217,16 @@ bool close_temporary_tables(THD *thd)
          within the sublist of common pseudo_thread_id to create single
          DROP query 
       */
-      for (;
+      for (at_least_one_create_logged= false;
            table && is_user_table(table) &&
              tmpkeyval(thd, table) == thd->variables.pseudo_thread_id &&
              table->s->db.length == db.length() &&
              memcmp(table->s->db.str, db.ptr(), db.length()) == 0;
            table= next)
       {
+        if (table->s->table_creation_was_logged)
+        {
+          at_least_one_create_logged= true;
           /*
             We are going to add ` around the table names and possible more
             due to special characters
@@ -1231,10 +1234,13 @@ bool close_temporary_tables(THD *thd)
           append_identifier(thd, &s_query, table->s->table_name.str,
                             strlen(table->s->table_name.str));
           s_query.append(',');
+        }
         next= table->next;
         mysql_lock_remove(thd, thd->lock, table);
         close_temporary(table, 1, 1);
       }
+      if (at_least_one_create_logged)
+      {
         thd->clear_error();
         CHARSET_INFO *cs_save= thd->variables.character_set_client;
         thd->variables.character_set_client= system_charset_info;
@@ -1266,7 +1272,7 @@ bool close_temporary_tables(THD *thd)
                           "temporary tables to binary log");
         }
         thd->get_stmt_da()->set_overwrite_status(false);
-
+      }
       thd->variables.pseudo_thread_id= save_pseudo_thread_id;
       thd->thread_specific_used= save_thread_specific_used;
     }

sql/sql_table.cc

@@ -2265,7 +2265,7 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
   for (table= tables; table; table= table->next_local)
   {
     bool is_trans= 0;
-    bool table_creation_was_logged= 1;
+    bool table_creation_was_logged= 0;
     char *db=table->db;
     size_t db_length= table->db_length;
     handlerton *table_type= 0;