diff --git a/inc/bool_matcher.h b/inc/bool_matcher.h
index 20cde6d..08df846 100644
--- a/inc/bool_matcher.h
+++ b/inc/bool_matcher.h
@@ -52,7 +52,7 @@ extern "C"
 	struct bool_matcher * bool_matcher_new(struct bool_expr * exprs, size_t expr_num, unsigned int max_thread_num, size_t * mem_size);
 
 	/* Returned results are sorted by expr_id in descending order. */
-	/* 本函数将对数组item_ids进行排序，会改变item_ids中元素的顺序 */
+	//Input item_ids MUST be ASCENDING order and NO duplication.
 	int bool_matcher_match(struct bool_matcher * matcher, unsigned int thread_id, unsigned long long * item_ids, size_t item_num, struct bool_expr_match * results, size_t n_result);
 
 	void bool_matcher_free(struct bool_matcher * matcher);
diff --git a/src/entry/Maat_hierarchy.cpp b/src/entry/Maat_hierarchy.cpp
index ede86e4..d4e4b84 100644
--- a/src/entry/Maat_hierarchy.cpp
+++ b/src/entry/Maat_hierarchy.cpp
@@ -331,7 +331,7 @@ static void Maat_hierarchy_region_free(struct Maat_hierarchy* hier, struct Maat_
 struct Maat_hierarchy* Maat_hierarchy_new(int thread_num, void* mesa_handle_logger, struct Maat_garbage_bin* bin)
 {
 	struct Maat_hierarchy* hier=ALLOC(struct Maat_hierarchy, 1);
-	int ret=0;
+	UNUSED int ret=0;
 	hier->logger=mesa_handle_logger;
 	hier->thread_num=thread_num;
 	hier->version=time(NULL);
diff --git a/src/entry/Maat_rule.cpp b/src/entry/Maat_rule.cpp
index 9db757e..1098b95 100644
--- a/src/entry/Maat_rule.cpp
+++ b/src/entry/Maat_rule.cpp
@@ -57,7 +57,7 @@ extern "C"
 }
 #endif
 
-int MAAT_FRAME_VERSION_3_2_1_20210613=1;
+int MAAT_FRAME_VERSION_3_2_2_20210629=1;
 
 int is_valid_table_name(const char* str)
 {
@@ -1425,7 +1425,7 @@ int del_region_rule(struct Maat_table_schema* table, int region_id, int group_id
 	struct Maat_table_runtime* table_rt=NULL;
 	struct op_expr_t* op_expr=NULL;
 
-	int ret=0;
+	UNUSED int ret=0;
 	struct Maat_region_inner* region=NULL;
 	region=(struct Maat_region_inner*)Maat_hierarchy_region_dettach_user_data(maat_scanner->hier, region_id);
 	if(region==NULL)
diff --git a/src/entry/bool_matcher.cpp b/src/entry/bool_matcher.cpp
index 5ca3461..cabc552 100644
--- a/src/entry/bool_matcher.cpp
+++ b/src/entry/bool_matcher.cpp
@@ -150,13 +150,13 @@ int bool_matcher_match(struct bool_matcher * matcher, unsigned int thread_id, un
 	if(matcher==NULL) return -1;
 	if(item_num==0) return 0;
 
-	sort(item_ids, item_ids+item_num);
-	size_t J=0;
-	for(unsigned int i=1; i<item_num; i++)
-	{
-		if(item_ids[i]!=item_ids[J]) item_ids[++J]=item_ids[i];
-	}
-	item_num=J+1;
+//	sort(item_ids, item_ids+item_num);
+//	size_t J=0;
+//	for(unsigned int i=1; i<item_num; i++)
+//	{
+//		if(item_ids[i]!=item_ids[J]) item_ids[++J]=item_ids[i];
+//	}
+//	item_num=J+1;
 
 	unsigned int r=0;
 
diff --git a/test/perf_test_maatframe.cpp b/test/perf_test_maatframe.cpp
index 8789215..f842b56 100644
--- a/test/perf_test_maatframe.cpp
+++ b/test/perf_test_maatframe.cpp
@@ -3,6 +3,7 @@
 #include "stream_fuzzy_hash.h"
 #include "Maat_command.h"
 #include <MESA/MESA_handle_logger.h>
+using namespace std;
 #include <gtest/gtest.h>
 #include <stdlib.h>
 #include <arpa/inet.h>
@@ -92,6 +93,7 @@ TEST(BoolMatcher, Match)
 			input_item_ids[input_item_num]=random();
 			input_item_num++;
 		}
+		sort(input_item_ids, input_item_ids+input_item_num);
 		ret=bool_matcher_match(bm, 1, input_item_ids, input_item_num, result_array, 1024);
 		if(ret>0)
 		{
@@ -116,6 +118,7 @@ TEST(BoolMatcher, Match)
 	input_item_ids[14]=222;
 	input_item_ids[15]=333;
 	input_item_num=8;
+	sort(input_item_ids, input_item_ids+input_item_num);
 	for(i=0; i<test_count; i++)
 	{
 		ret=bool_matcher_match(bm, 1, input_item_ids, input_item_num, result_array, 1024);