Merge bk-internal:/home/bk/mysql-5.0-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0-maint

BitKeeper/etc/collapsed

@@ -15,3 +15,5 @@
 45214442pBGT9KuZEGixBH71jTzbOA
 45214a07hVsIGwvwa-WrO-jpeaSwVw
 452a92d0-31-8wSzSfZi165fcGcXPA
+454a7ef8gdvE_ddMlJyghvOAkKPNOQ
+454f8960jsVT_kMKJtZ9OCgXoba0xQ

mysql-test/r/func_test.result

@@ -182,6 +182,81 @@ select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3;
 select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3;
 5 mod 3	5 mod -3	-5 mod 3	-5 mod -3
 2	2	-2	-2
+select (12%0) <=> null      as '1';
+1
+1
+select (12%0) is null       as '1';
+1
+1
+select 12%0                 as 'NULL';
+NULL
+NULL
+select 12%2                 as '0';
+0
+0
+select 12%NULL              as 'NULL';
+NULL
+NULL
+select 12 % null            as 'NULL';
+NULL
+NULL
+select null % 12            as 'NULL';
+NULL
+NULL
+select null % 0             as 'NULL';
+NULL
+NULL
+select 0 % null             as 'NULL';
+NULL
+NULL
+select null % null          as 'NULL';
+NULL
+NULL
+select (12 mod 0) <=> null  as '1';
+1
+1
+select (12 mod 0) is null   as '1';
+1
+1
+select 12 mod 0             as 'NULL';
+NULL
+NULL
+select 12 mod 2             as '0';
+0
+0
+select 12 mod null          as 'NULL';
+NULL
+NULL
+select null mod 12          as 'NULL';
+NULL
+NULL
+select null mod 0           as 'NULL';
+NULL
+NULL
+select 0 mod null           as 'NULL';
+NULL
+NULL
+select null mod null        as 'NULL';
+NULL
+NULL
+select mod(12.0, 0)         as 'NULL';
+NULL
+NULL
+select mod(12, 0.0)         as 'NULL';
+NULL
+NULL
+select mod(12, NULL)        as 'NULL';
+NULL
+NULL
+select mod(12.0, NULL)      as 'NULL';
+NULL
+NULL
+select mod(NULL, 2)         as 'NULL';
+NULL
+NULL
+select mod(NULL, 2.0)       as 'NULL';
+NULL
+NULL
 create table t1 (a int, b int);
 insert into t1 values (1,2), (2,3), (3,4), (4,5);
 select * from t1 where a not between 1 and 2;

mysql-test/r/rpl_view.result

@@ -47,11 +47,11 @@ show binlog events limit 1,100;
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 slave-bin.000001	#	Query	1	#	use `test`; create table t1 (a int)
 slave-bin.000001	#	Query	1	#	use `test`; insert into t1 values (1)
-slave-bin.000001	#	Query	1	#	use `test`; CREATE ALGORITHM=UNDEFINED DEFINER=root@localhost SQL SECURITY DEFINER VIEW v1 AS select a from t1
+slave-bin.000001	#	Query	1	#	use `test`; CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select a from t1
 slave-bin.000001	#	Query	1	#	use `test`; insert into v1 values (2)
 slave-bin.000001	#	Query	1	#	use `test`; update v1 set a=3 where a=1
 slave-bin.000001	#	Query	1	#	use `test`; delete from v1 where a=2
-slave-bin.000001	#	Query	1	#	use `test`; ALTER ALGORITHM=UNDEFINED DEFINER=root@localhost SQL SECURITY DEFINER VIEW v1 AS select a as b from t1
+slave-bin.000001	#	Query	1	#	use `test`; ALTER ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select a as b from t1
 slave-bin.000001	#	Query	1	#	use `test`; drop view v1
 slave-bin.000001	#	Query	1	#	use `test`; drop table t1
 

mysql-test/t/func_test.test

@@ -108,6 +108,40 @@ select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3;
 
 select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3;
 
+#
+# Bug#23411: The "%" (MOD) operator is not documented; MOD-ing zero returns strange result
+# Manual: "Division by zero produces a NULL result"
+#
+select (12%0) <=> null      as '1';
+select (12%0) is null       as '1';
+select 12%0                 as 'NULL';
+select 12%2                 as '0';
+select 12%NULL              as 'NULL';
+select 12 % null            as 'NULL';
+select null % 12            as 'NULL';
+select null % 0             as 'NULL';
+select 0 % null             as 'NULL';
+select null % null          as 'NULL';
+
+select (12 mod 0) <=> null  as '1';
+select (12 mod 0) is null   as '1';
+select 12 mod 0             as 'NULL';
+select 12 mod 2             as '0';
+select 12 mod null          as 'NULL';
+select null mod 12          as 'NULL';
+select null mod 0           as 'NULL';
+select 0 mod null           as 'NULL';
+select null mod null        as 'NULL';
+
+select mod(12.0, 0)         as 'NULL';
+select mod(12, 0.0)         as 'NULL';
+select mod(12, NULL)        as 'NULL';
+select mod(12.0, NULL)      as 'NULL';
+select mod(NULL, 2)         as 'NULL';
+select mod(NULL, 2.0)       as 'NULL';
+
+
+#
 # Bug#6726: NOT BETWEEN parse failure
 #
 create table t1 (a int, b int);

sql/item_func.cc

@@ -105,7 +105,7 @@ Item_func::Item_func(THD *thd, Item_func *item)
 
 
 /*
-  Resolve references to table column for a function and it's argument
+  Resolve references to table column for a function and its argument
 
   SYNOPSIS:
   fix_fields()
@@ -1377,6 +1377,13 @@ void Item_func_mod::result_precision()
 }
 
 
+void Item_func_mod::fix_length_and_dec()
+{
+  Item_num_op::fix_length_and_dec();
+  maybe_null= 1;
+}
+
+
 double Item_func_neg::real_op()
 {
   double value= args[0]->val_real();

sql/item_func.h

@@ -430,6 +430,7 @@ public:
   my_decimal *decimal_op(my_decimal *);
   const char *func_name() const { return "%"; }
   void result_precision();
+  void fix_length_and_dec();
 };
 
 

sql/slave.cc

@@ -2854,8 +2854,21 @@ improper_arguments: %d  timed_out: %d",
 
 void set_slave_thread_options(THD* thd)
 {
-  thd->options = ((opt_log_slave_updates) ? OPTION_BIN_LOG:0) |
-    OPTION_AUTO_IS_NULL;
+  /*
+     It's nonsense to constrain the slave threads with max_join_size; if a
+     query succeeded on master, we HAVE to execute it. So set
+     OPTION_BIG_SELECTS. Setting max_join_size to HA_POS_ERROR is not enough
+     (and it's not needed if we have OPTION_BIG_SELECTS) because an INSERT
+     SELECT examining more than 4 billion rows would still fail (yes, because
+     when max_join_size is 4G, OPTION_BIG_SELECTS is automatically set, but
+     only for client threads.
+  */
+  ulonglong options= thd->options | OPTION_BIG_SELECTS;
+  if (opt_log_slave_updates)
+    options|= OPTION_BIN_LOG;
+  else
+    options&= ~OPTION_BIN_LOG;
+  thd->options= options;
   thd->variables.completion_type= 0;
 }
 
@@ -2885,17 +2898,6 @@ static int init_slave_thread(THD* thd, SLAVE_THD_TYPE thd_type)
   thd->net.read_timeout = slave_net_timeout;
   thd->slave_thread = 1;
   set_slave_thread_options(thd);
-  /* 
-     It's nonsense to constrain the slave threads with max_join_size; if a
-     query succeeded on master, we HAVE to execute it. So set
-     OPTION_BIG_SELECTS. Setting max_join_size to HA_POS_ERROR is not enough
-     (and it's not needed if we have OPTION_BIG_SELECTS) because an INSERT
-     SELECT examining more than 4 billion rows would still fail (yes, because
-     when max_join_size is 4G, OPTION_BIG_SELECTS is automatically set, but
-     only for client threads.
-  */
-  thd->options = ((opt_log_slave_updates) ? OPTION_BIN_LOG:0) |
-    OPTION_AUTO_IS_NULL | OPTION_BIG_SELECTS;
   thd->client_capabilities = CLIENT_LOCAL_FILES;
   thd->real_id=pthread_self();
   pthread_mutex_lock(&LOCK_thread_count);