MDEV-17753 ALTER USER fail to replicate

Change mysql_alter_user to log alter user command.

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

@@ -31,6 +31,13 @@ Host	User
 fakehost	barbar
 fakehost	foofoo
 connection master;
+alter user 'foofoo'@'fakehost' identified by 'foo';
+alter user 'non_exist_user1'@'fakehost' identified by 'foo', 'barbar'@'fakehost' identified by 'bar';
+ERROR HY000: Operation ALTER USER failed for 'non_exist_user1'@'fakehost'
+alter user 'non_exist_user1'@'fakehost' identified by 'foo', 'non_exist_user2'@'fakehost' identified by 'bar';
+ERROR HY000: Operation ALTER USER failed for 'non_exist_user1'@'fakehost','non_exist_user2'@'fakehost'
+connection slave;
+connection master;
 drop user 'foofoo'@'fakehost';
 drop user 'not_exist_user1'@'fakehost', 'barbar'@'fakehost';
 ERROR HY000: Operation DROP USER failed for 'not_exist_user1'@'fakehost'
@@ -51,6 +58,10 @@ master-bin.000001	#	Query	#	#	use `test`; rename user 'foo'@'fakehost' to 'foofo
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; rename user 'not_exist_user1'@'fakehost' to 'foobar'@'fakehost', 'bar'@'fakehost' to 'barbar'@'fakehost'
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; alter user 'foofoo'@'fakehost' identified by 'foo'
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
+master-bin.000001	#	Query	#	#	use `test`; alter user 'non_exist_user1'@'fakehost' identified by 'foo', 'barbar'@'fakehost' identified by 'bar'
+master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; drop user 'foofoo'@'fakehost'
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
 master-bin.000001	#	Query	#	#	use `test`; drop user 'not_exist_user1'@'fakehost', 'barbar'@'fakehost'

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

@@ -41,6 +41,17 @@ rename user 'not_exist_user1'@'fakehost' to 'foobar'@'fakehost', 'not_exist_user
 sync_slave_with_master;
 select Host,User from mysql.user where Host='fakehost';
 
+#
+# Test alter user
+#
+connection master;
+alter user 'foofoo'@'fakehost' identified by 'foo';
+--error ER_CANNOT_USER
+alter user 'non_exist_user1'@'fakehost' identified by 'foo', 'barbar'@'fakehost' identified by 'bar';
+--error ER_CANNOT_USER
+alter user 'non_exist_user1'@'fakehost' identified by 'foo', 'non_exist_user2'@'fakehost' identified by 'bar';
+sync_slave_with_master;
+
 #
 # Test drop user
 #

sql/sql_acl.cc

@@ -10478,6 +10478,7 @@ int mysql_alter_user(THD* thd, List<LEX_USER> &users_list)
   DBUG_ENTER("mysql_alter_user");
   int result= 0;
   String wrong_users;
+  bool some_users_altered= false;
 
   /* The only table we're altering is the user table. */
   Grant_tables tables(Table_user, TL_WRITE);
@@ -10503,6 +10504,7 @@ int mysql_alter_user(THD* thd, List<LEX_USER> &users_list)
       result= TRUE;
       continue;
     }
+    some_users_altered= true;
   }
 
   /* Unlock ACL data structures. */
@@ -10527,6 +10529,10 @@ int mysql_alter_user(THD* thd, List<LEX_USER> &users_list)
                wrong_users.c_ptr_safe());
     }
   }
+
+  if (some_users_altered)
+    result|= write_bin_log(thd, FALSE, thd->query(),
+                                     thd->query_length());
   DBUG_RETURN(result);
 }