diff --git a/KVstore/IVTree/IVTree.cpp b/KVstore/IVTree/IVTree.cpp
index a4070ae..7a97a9f 100644
--- a/KVstore/IVTree/IVTree.cpp
+++ b/KVstore/IVTree/IVTree.cpp
@@ -622,6 +622,17 @@ IVTree::release(IVNode* _np) const
 	delete _np;
 }
 
+void
+IVTree::AddIntoCache(TYPE_PREDICATE_ID _id)
+{
+	char* _tmp = NULL;
+	unsigned _len;
+	this->search(_id, _tmp, _len);
+//	cout << "len is " << len << endl;
+	this->value_list->AddIntoCache(_id, _tmp, _len);
+	delete [] _tmp;
+}
+
 void
 IVTree::AddIntoCache(TYPE_ENTITY_LITERAL_ID _id)
 {