diff --git a/mysql-test/r/func_time.result b/mysql-test/r/func_time.result
index edbdd6b08da..b5fd35d926f 100644
--- a/mysql-test/r/func_time.result
+++ b/mysql-test/r/func_time.result
@@ -847,3 +847,28 @@ timestampdiff(year,'2004-02-28','2005-02-28')
 select timestampdiff(year,'2004-02-29','2005-02-28');
 timestampdiff(year,'2004-02-29','2005-02-28')
 0
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, day date);
+CREATE TABLE t2 (id int NOT NULL PRIMARY KEY, day date);
+INSERT INTO t1 VALUES
+(1, '2005-06-01'), (2, '2005-02-01'), (3, '2005-07-01');
+INSERT INTO t2 VALUES
+(1, '2005-08-01'), (2, '2005-06-15'), (3, '2005-07-15');
+SELECT * FROM t1, t2 
+WHERE t1.day BETWEEN 
+'2005.09.01' - INTERVAL 6 MONTH AND t2.day;
+id	day	id	day
+1	2005-06-01	1	2005-08-01
+3	2005-07-01	1	2005-08-01
+1	2005-06-01	2	2005-06-15
+1	2005-06-01	3	2005-07-15
+3	2005-07-01	3	2005-07-15
+SELECT * FROM t1, t2 
+WHERE CAST(t1.day AS DATE) BETWEEN 
+'2005.09.01' - INTERVAL 6 MONTH AND t2.day;
+id	day	id	day
+1	2005-06-01	1	2005-08-01
+3	2005-07-01	1	2005-08-01
+1	2005-06-01	2	2005-06-15
+1	2005-06-01	3	2005-07-15
+3	2005-07-01	3	2005-07-15
+DROP TABLE t1,t2;
diff --git a/mysql-test/r/innodb.result b/mysql-test/r/innodb.result
index bbeaf3519c2..0ffcc70ec16 100644
--- a/mysql-test/r/innodb.result
+++ b/mysql-test/r/innodb.result
@@ -3194,6 +3194,15 @@ drop trigger t2t;
 drop trigger t3t;
 drop trigger t4t;
 drop table t1, t2, t3, t4, t5;
+create table t1(a date) engine=innodb;
+create table t2(a date, key(a)) engine=innodb;
+insert into t1 values('2005-10-01');
+insert into t2 values('2005-10-01');
+select * from t1, t2
+where t2.a between t1.a - interval 2 day and t1.a + interval 2 day;
+a	a
+2005-10-01	2005-10-01
+drop table t1, t2;
 CREATE TABLE t1 (
 field1 varchar(8) NOT NULL DEFAULT '',
 field2 varchar(8) NOT NULL DEFAULT '',
diff --git a/mysql-test/t/func_time.test b/mysql-test/t/func_time.test
index c98c1c94609..4e4fb8f777a 100644
--- a/mysql-test/t/func_time.test
+++ b/mysql-test/t/func_time.test
@@ -446,4 +446,26 @@ select timestampdiff(year,'1999-09-11','2001-9-11');
 select timestampdiff(year,'2004-02-28','2005-02-28');
 select timestampdiff(year,'2004-02-29','2005-02-28');
 
+#
+# Bug #18618: BETWEEN for dates with the second argument being a constant
+#             expression and the first and the third arguments being fields 
+#
+
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, day date);
+CREATE TABLE t2 (id int NOT NULL PRIMARY KEY, day date);
+
+INSERT INTO t1 VALUES
+  (1, '2005-06-01'), (2, '2005-02-01'), (3, '2005-07-01');
+INSERT INTO t2 VALUES
+  (1, '2005-08-01'), (2, '2005-06-15'), (3, '2005-07-15');
+
+SELECT * FROM t1, t2 
+  WHERE t1.day BETWEEN 
+               '2005.09.01' - INTERVAL 6 MONTH AND t2.day;
+SELECT * FROM t1, t2 
+  WHERE CAST(t1.day AS DATE) BETWEEN 
+                             '2005.09.01' - INTERVAL 6 MONTH AND t2.day;
+ 
+DROP TABLE t1,t2;
+
 # End of 5.0 tests
diff --git a/mysql-test/t/innodb.test b/mysql-test/t/innodb.test
index 0a8e46d694c..83b167def73 100644
--- a/mysql-test/t/innodb.test
+++ b/mysql-test/t/innodb.test
@@ -2085,6 +2085,18 @@ connection default;
 disconnect a;
 disconnect b;
 
+#
+# Bug #14360: problem with intervals
+#
+
+create table t1(a date) engine=innodb;
+create table t2(a date, key(a)) engine=innodb; 
+insert into t1 values('2005-10-01');
+insert into t2 values('2005-10-01');
+select * from t1, t2
+  where t2.a between t1.a - interval 2 day and t1.a + interval 2 day;
+drop table t1, t2;
+
 #
 # Test that cascading updates leading to duplicate keys give the correct
 # error message (bug #9680)
@@ -2137,4 +2149,3 @@ alter table t1 drop foreign key c2_fk;
 show create table t1;
 #
 drop table t1, t2;
-
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 493c3dbc60e..acee912c912 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -52,7 +52,6 @@ static void agg_cmp_type(THD *thd, Item_result *type, Item **items, uint nitems)
 {
   uint i;
   Field *field= NULL;
-  bool all_constant= TRUE;
 
   /* If the first argument is a FIELD_ITEM, pull out the field. */
   if (items[0]->real_item()->type() == Item::FIELD_ITEM)
@@ -65,16 +64,9 @@ static void agg_cmp_type(THD *thd, Item_result *type, Item **items, uint nitems)
   for (i= 1; i < nitems; i++)
   {
     type[0]= item_cmp_type(type[0], items[i]->result_type());
-    if (field && !convert_constant_item(thd, field, &items[i]))
-      all_constant= FALSE;
+    if (field && convert_constant_item(thd, field, &items[i]))
+      type[0]= INT_RESULT;
   }
-
-  /*
-    If we had a field that can be compared as a longlong, and all constant
-    items, then the aggregate result will be an INT_RESULT.
-  */
-  if (field && all_constant)
-    type[0]= INT_RESULT;
 }
 
 
diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index 99cb7078eba..6fbd6db1a89 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -2002,6 +2002,41 @@ longlong Item_date_add_interval::val_int()
     ((date*100L + ltime.hour)*100L+ ltime.minute)*100L + ltime.second;
 }
 
+
+
+bool Item_date_add_interval::eq(const Item *item, bool binary_cmp) const
+{
+  INTERVAL interval, other_interval;
+  String val= value;   // Because of const
+
+  if (this == item)
+    return TRUE;
+
+  if ((item->type() != FUNC_ITEM) ||
+      (arg_count != ((Item_func*) item)->arg_count) ||
+      (func_name() != ((Item_func*) item)->func_name()))
+    return FALSE;
+
+  Item_date_add_interval *other= (Item_date_add_interval*) item;
+
+  if ((int_type != other->int_type) ||
+      (!args[0]->eq(other->args[0], binary_cmp)) ||
+      (get_interval_value(args[1], int_type, &val, &interval)))
+    return FALSE;
+
+  val= other->value;
+
+  if ((get_interval_value(other->args[1], other->int_type, &val,
+                         &other_interval)) ||
+      ((date_sub_interval ^ interval.neg) ^
+       (other->date_sub_interval ^ other_interval.neg)))
+    return FALSE;
+
+  // Assume comparing same types here due to earlier check
+  return memcmp(&interval, &other_interval, sizeof(INTERVAL)) == 0;
+}
+
+
 static const char *interval_names[]=
 {
   "year", "quarter", "month", "day", "hour",
diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index fd2f3945fca..c5ea618dafe 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -647,6 +647,7 @@ public:
   double val_real() { DBUG_ASSERT(fixed == 1); return (double) val_int(); }
   longlong val_int();
   bool get_date(TIME *res, uint fuzzy_date);
+  bool eq(const Item *item, bool binary_cmp) const;
   void print(String *str);
 };