diff --git a/mysql-test/suite/tianmu/r/issue1352.result b/mysql-test/suite/tianmu/r/issue1352.result
new file mode 100644
index 000000000..ceeba31c8
--- /dev/null
+++ b/mysql-test/suite/tianmu/r/issue1352.result
@@ -0,0 +1,25 @@
+DROP DATABASE IF EXISTS issue1352_test;
+CREATE DATABASE issue1352_test;
+USE issue1352_test;
+CREATE TABLE test (dt TIMESTAMP) engine=tianmu;
+insert test values(now());
+EXPLAIN SELECT dt FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt < now();
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` >= <cache>((now() - interval 30 day))) and (`issue1352_test`.`test`.`dt` < <cache>(now())))(t0) Pckrows: 1, susp. 0 (0 empty 1 full). Conditions: 1
+EXPLAIN SELECT dt FROM test WHERE dt < date_sub(now(), INTERVAL 30 DAY) AND dt < now();
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` < <cache>((now() - interval 30 day))) and (`issue1352_test`.`test`.`dt` < <cache>(now())))(t0) Pckrows: 1, susp. 0 (1 empty 0 full). Conditions: 1
+EXPLAIN SELECT dt FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now();
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` >= <cache>((now() - interval 30 day))) and (`issue1352_test`.`test`.`dt` >= <cache>(now())))(t0) Pckrows: 1, susp. 0 (1 empty 0 full). Conditions: 1
+EXPLAIN SELECT count(dt) FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now() group by dt;
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` >= <cache>((now() - interval 30 day))) and (`issue1352_test`.`test`.`dt` >= <cache>(now())))(t0) Pckrows: 1, susp. 0 (1 empty 0 full). Conditions: 1; Using temporary; Using filesort
+EXPLAIN SELECT count(dt) FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now() group by dt;
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` >= <cache>((now() - interval 30 day))) and (`issue1352_test`.`test`.`dt` >= <cache>(now())))(t0) Pckrows: 1, susp. 0 (1 empty 0 full). Conditions: 1; Using temporary; Using filesort
+EXPLAIN SELECT dt FROM test WHERE dt >= date_add(now(), INTERVAL 30 DAY) AND dt < now();
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	test	NULL	ALL	NULL	NULL	NULL	NULL	1	100.00	Using where with pushed condition ((`issue1352_test`.`test`.`dt` >= <cache>((now() + interval 30 day))) and (`issue1352_test`.`test`.`dt` < <cache>(now())))
+DROP TABLE test;
+DROP DATABASE issue1352_test;
diff --git a/mysql-test/suite/tianmu/t/issue1352.test b/mysql-test/suite/tianmu/t/issue1352.test
new file mode 100644
index 000000000..c9cab52d9
--- /dev/null
+++ b/mysql-test/suite/tianmu/t/issue1352.test
@@ -0,0 +1,36 @@
+--source include/have_tianmu.inc
+
+--disable_warnings
+
+DROP DATABASE IF EXISTS issue1352_test;
+CREATE DATABASE issue1352_test;
+
+USE issue1352_test;
+
+## DDL
+
+CREATE TABLE test (dt TIMESTAMP) engine=tianmu;
+
+### insert data
+
+insert test values(now());
+
+## explain
+
+EXPLAIN SELECT dt FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt < now();
+
+EXPLAIN SELECT dt FROM test WHERE dt < date_sub(now(), INTERVAL 30 DAY) AND dt < now();
+
+EXPLAIN SELECT dt FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now();
+
+EXPLAIN SELECT count(dt) FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now() group by dt;
+
+EXPLAIN SELECT count(dt) FROM test WHERE dt >= date_sub(now(), INTERVAL 30 DAY) AND dt >= now() group by dt;
+
+EXPLAIN SELECT dt FROM test WHERE dt >= date_add(now(), INTERVAL 30 DAY) AND dt < now();
+
+## clean test table
+
+DROP TABLE test;
+
+DROP DATABASE issue1352_test;
diff --git a/storage/tianmu/core/mysql_expression.cpp b/storage/tianmu/core/mysql_expression.cpp
index f0ee1327f..0f2e4ef98 100644
--- a/storage/tianmu/core/mysql_expression.cpp
+++ b/storage/tianmu/core/mysql_expression.cpp
@@ -579,8 +579,11 @@ bool operator==(Item const &, Item const &);
 
 namespace {
 bool generic_item_same(Item const &left, Item const &right) {
-  return ((&left == &right) ||
-          ((left.type() == right.type()) && (left.result_type() == right.result_type()) &&
+  if (&left == &right) {
+    return true;
+  }
+
+  return (((left.type() == right.type()) && (left.result_type() == right.result_type()) &&
            (left.cast_to_int_type() == right.cast_to_int_type()) &&
            (left.string_field_type() == right.string_field_type()) && (left.field_type() == right.field_type()) &&
            (left.const_during_execution() == right.const_during_execution()) && (left == right)));
@@ -601,8 +604,8 @@ bool operator==(Item const &left, Item const &right) {
       } break;
       case (Item::COND_ITEM):
       case (Item::FUNC_ITEM): {
-        Item_func const *l = static_cast<Item_func const *>(&left);
-        Item_func const *r = static_cast<Item_func const *>(&right);
+        Item_func const *l = down_cast<Item_func const *>(&left);
+        Item_func const *r = down_cast<Item_func const *>(&right);
         same = !std::strcmp(l->func_name(), r->func_name());
         same = same && (l->arg_count == r->arg_count);
         same = same && l->functype() == r->functype();
@@ -611,8 +614,8 @@ bool operator==(Item const &left, Item const &right) {
         same = same && l->item_name.eq_safe(r->item_name);
         if (l->functype() == Item_func::GUSERVAR_FUNC) {
           if (same) {
-            Item_func_get_user_var const *ll = static_cast<Item_func_get_user_var const *>(&left);
-            Item_func_get_user_var const *rr = static_cast<Item_func_get_user_var const *>(&right);
+            Item_func_get_user_var const *ll = down_cast<Item_func_get_user_var const *>(&left);
+            Item_func_get_user_var const *rr = down_cast<Item_func_get_user_var const *>(&right);
             same = !std::strcmp(ll->name.ptr(), rr->name.ptr());
           }
         } else {
@@ -628,13 +631,13 @@ bool operator==(Item const &left, Item const &right) {
           same = same && ((l->int_type == r->int_type) && (l->date_sub_interval == r->date_sub_interval));
 
           if (l->functype() == Item_func::IN_FUNC) {
-            const Item_func_in *l = static_cast<const Item_func_in *>(&left);
-            const Item_func_in *r = static_cast<const Item_func_in *>(&right);
+            const Item_func_in *l = down_cast<const Item_func_in *>(&left);
+            const Item_func_in *r = down_cast<const Item_func_in *>(&right);
             same = same && l->negated == r->negated;
           }
           if (same && (l->functype() == Item_func::COND_AND_FUNC || l->functype() == Item_func::COND_OR_FUNC)) {
-            Item_cond *l = const_cast<Item_cond *>(static_cast<Item_cond const *>(&left));
-            Item_cond *r = const_cast<Item_cond *>(static_cast<Item_cond const *>(&right));
+            Item_cond *l = const_cast<Item_cond *>(down_cast<Item_cond const *>(&left));
+            Item_cond *r = const_cast<Item_cond *>(down_cast<Item_cond const *>(&right));
             List_iterator<Item> li(*l->argument_list());
             List_iterator<Item> ri(*r->argument_list());
             Item *il, *ir;
@@ -649,13 +652,13 @@ bool operator==(Item const &left, Item const &right) {
         }
       } break;
       case static_cast<int>(Item_tianmufield::enumTIANMUFiledItem::TIANMUFIELD_ITEM): {
-        Item_tianmufield const *l = static_cast<Item_tianmufield const *>(&left);
-        Item_tianmufield const *r = static_cast<Item_tianmufield const *>(&right);
+        Item_tianmufield const *l = down_cast<Item_tianmufield const *>(&left);
+        Item_tianmufield const *r = down_cast<Item_tianmufield const *>(&right);
         same = (*l == *r);
       } break;
       case (Item::REF_ITEM): {
-        Item_ref const *l = static_cast<Item_ref const *>(&left);
-        Item_ref const *r = static_cast<Item_ref const *>(&right);
+        Item_ref const *l = down_cast<Item_ref const *>(&left);
+        Item_ref const *r = down_cast<Item_ref const *>(&right);
         same = (!(l->ref || r->ref)) ||
                (l->ref && r->ref &&
                 ((!(*(l->ref) || *(r->ref))) || (*(l->ref) && *(r->ref) && (*(*(l->ref)) == *(*(r->ref))))));
@@ -665,6 +668,7 @@ bool operator==(Item const &left, Item const &right) {
       case (Item::DECIMAL_ITEM):
       case (Item::REAL_ITEM):
       case (Item::VARBIN_ITEM):
+      case (Item::CACHE_ITEM):
       case (Item::INT_ITEM): {
         same = left.eq(&right, true);
       } break;