Merge 10.3 into 10.4

Author: dr-m

mysql-test/main/lock_kill.test

@@ -17,7 +17,7 @@ LOCK TABLE t1 WRITE;
 eval KILL $conid;
 --enable_query_log
 --connection con1
---error 0,2013
+--error 0,2013,ER_CONNECTION_KILLED
 reap;
 --connection default
 --disconnect con1
@@ -35,7 +35,7 @@ LOCK TABLE t1 WRITE, t2 WRITE;
 eval KILL $conid;
 --enable_query_log
 --connection con1
---error 0,2013
+--error 0,2013,ER_CONNECTION_KILLED
 reap;
 --connection default
 --disconnect con1

sql/sql_admin.cc

@@ -588,6 +588,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
 
     if (thd->check_killed())
     {
+      open_error= false;
       fatal_error= true;
       result_code= HA_ADMIN_FAILED;
       goto send_result;