--- like-predicate.cc	2013-02-26 22:15:58.000000000 +0800
+++ newlike-predicate.cc	2013-02-28 15:13:20.776649677 +0800
@@ -55,6 +55,15 @@
   return &p->result_.bool_val;
 }
 
+void* LikePredicate::ConstantEqualWithFn(Expr* e, TupleRow* row) {
+  LikePredicate* p = static_cast<LikePredicate*>(e);
+  DCHECK_EQ(p->GetNumChildren(), 2);
+  StringValue* val = static_cast<StringValue*>(e->GetChild(0)->GetValue(row));
+  if (val == NULL) return NULL;
+  p->result_.bool_val = p->search_string_sv_.Eq(val);
+  return &p->result_.bool_val;
+}
+
 void* LikePredicate::ConstantEndsWithFn(Expr* e, TupleRow* row) {
   LikePredicate* p = static_cast<LikePredicate*>(e);
   DCHECK_EQ(p->GetNumChildren(), 2);
@@ -150,7 +159,15 @@
             StringValue(const_cast<char*>(search_string_.c_str()), search_string_.size());
         compute_fn_ = ConstantEndsWithFn;
         return Status::OK;
-      } 
+      }else{
+    	// for the condition: ... where city LIKE 'HangZhou' ...
+    	search_string_ = match_res.str(1);
+    	search_string_sv_ =
+    	    StringValue(const_cast<char*>(search_string_.c_str()), search_string_.size());
+    	compute_fn_ = ConstantEqualWithFn;
+    	return Status::OK;  
+      }
+      
     } 
     string re_pattern;
     if (opcode_ == TExprOpcode::LIKE) {
@@ -225,3 +242,4 @@
 }
 
 }
+