item_func.h:

  Fix for a bug with LEAST() in WHERE clause
ha_innodb.cc:
  Fix for a configure bug
multi_update.result, multi_update.test:
  Fix for the update with NULL's in the result set
sql_update.cc:
  Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set


sql/sql_update.cc:
  Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
mysql-test/t/multi_update.test:
  Fix for the update with NULL's in the result set
mysql-test/r/multi_update.result:
  Fix for the update with NULL's in the result set
sql/ha_innodb.cc:
  Fix for a configure bug
sql/item_func.h:
  Fix for a bug with LEAST() in WHERE clause

mysql-test/r/multi_update.result

@@ -318,3 +318,12 @@ create table t2(Z varchar(15));
 insert into t2(Z)  select concat(a.a,b.a,c.a,d.a) from t1 as a, t1 as b, t1 as c, t1 as d;
 update t2,t3 set Z =param_scenario_costs;
 drop table t1,t2,t3;
+create table t1 (a int, b int);
+create table t2 (a int, b int);
+insert into t1 values (1,1),(2,1),(3,1);
+insert into t2 values (1,1), (3,1);
+update t1 left join t2  on t1.a=t2.a set t1.b=2, t2.b=2 where t1.b=1 and t2.b=1 or t2.a is NULL;
+select t1.a, t1.b,t2.a, t2.b from t1 left join t2  on t1.a=t2.a where t1.b=1 and t2.b=1 or t2.a is NULL;
+a	b	a	b
+2	2	NULL	NULL
+drop table t1,t2;

mysql-test/t/multi_update.test

@@ -260,3 +260,10 @@ create table t2(Z varchar(15));
 insert into t2(Z)  select concat(a.a,b.a,c.a,d.a) from t1 as a, t1 as b, t1 as c, t1 as d;
 update t2,t3 set Z =param_scenario_costs;
 drop table t1,t2,t3;
+create table t1 (a int, b int);
+create table t2 (a int, b int);
+insert into t1 values (1,1),(2,1),(3,1);
+insert into t2 values (1,1), (3,1);
+update t1 left join t2  on t1.a=t2.a set t1.b=2, t2.b=2 where t1.b=1 and t2.b=1 or t2.a is NULL;
+select t1.a, t1.b,t2.a, t2.b from t1 left join t2  on t1.a=t2.a where t1.b=1 and t2.b=1 or t2.a is NULL;
+drop table t1,t2;

sql/ha_innodb.cc

@@ -28,7 +28,6 @@ InnoDB */
 
 #include "mysql_priv.h"
 #include "slave.h"
-#include "sql_cache.h"
 
 #ifdef HAVE_INNOBASE_DB
 #include <m_ctype.h>

sql/item_func.h

@@ -514,6 +514,7 @@ public:
   void fix_length_and_dec();
   enum Item_result result_type () const { return cmp_type; }
   unsigned int size_of() { return sizeof(*this);}  
+  table_map not_null_tables() const { return 0; }
 };
 
 class Item_func_min :public Item_func_min_max

sql/sql_update.cc

@@ -575,6 +575,7 @@ multi_update::initialize_tables(JOIN *join)
   {
     TABLE *table=table_ref->table;
     uint cnt= table_ref->shared;
+    Item_field *If;
     List<Item> temp_fields= *fields_for_table[cnt];
     ORDER     group;
 
@@ -598,7 +599,10 @@ multi_update::initialize_tables(JOIN *join)
     /* ok to be on stack as this is not referenced outside of this func */
     Field_string offset(table->file->ref_length, 0, "offset",
 			table, 1);
-    if (temp_fields.push_front(new Item_field(((Field *) &offset))))
+    if (!(If=new Item_field(((Field *) &offset))))
+      DBUG_RETURN(1);
+    If->maybe_null=0;
+    if (temp_fields.push_front(If))
       DBUG_RETURN(1);
 
     /* Make an unique key over the first field to avoid duplicated updates */