Fix for BUG#8562: In Item_int_with_ref::new_item() create Item_int or Item_uint

depending on ref->unsigned_flag. Item_int_with_ref can refer to both signed and 
unsigned integers.

mysql-test/r/bigint.result

@@ -87,3 +87,42 @@ drop table t1;
 SELECT '0x8000000000000001'+0;
 '0x8000000000000001'+0
 0
+create table t1 (
+value64  bigint unsigned  not null,
+value32  integer          not null,
+primary key(value64, value32)
+);
+create table t2 (
+value64  bigint unsigned  not null,
+value32  integer          not null,
+primary key(value64, value32)
+);
+insert into t1 values(17156792991891826145, 1);
+insert into t1 values( 9223372036854775807, 2);
+insert into t2 values(17156792991891826145, 3);
+insert into t2 values( 9223372036854775807, 4);
+select * from t1;
+value64	value32
+9223372036854775807	2
+17156792991891826145	1
+select * from t2;
+value64	value32
+9223372036854775807	4
+17156792991891826145	3
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=17156792991891826145;
+value64	value32	value64	value32
+17156792991891826145	1	17156792991891826145	3
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=t1.value64;
+value64	value32	value64	value32
+17156792991891826145	1	17156792991891826145	3
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=9223372036854775807;
+value64	value32	value64	value32
+9223372036854775807	2	9223372036854775807	4
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=t1.value64;
+value64	value32	value64	value32
+9223372036854775807	2	9223372036854775807	4
+drop table t1, t2;

mysql-test/t/bigint.test

@@ -71,3 +71,36 @@ drop table t1;
 # atof() behaviour is different of different systems. to be fixed in 4.1
 SELECT '0x8000000000000001'+0;
 
+# Test for BUG#8562: joins over BIGINT UNSIGNED value + constant propagation
+create table t1 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+create table t2 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+insert into t1 values(17156792991891826145, 1);
+insert into t1 values( 9223372036854775807, 2);
+insert into t2 values(17156792991891826145, 3);
+insert into t2 values( 9223372036854775807, 4);
+
+select * from t1;
+select * from t2;
+
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=17156792991891826145;
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=t1.value64;
+
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=9223372036854775807;
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=t1.value64;
+
+drop table t1, t2;
+

sql/item.h

@@ -1011,6 +1011,11 @@ public:
   {
     return ref->save_in_field(field, no_conversions);
   }
+  Item *new_item()
+  {
+    return (ref->unsigned_flag)? new Item_uint(ref->name, ref->max_length) :
+                                 new Item_int(ref->name, ref->max_length);
+  }
 };