diff --git a/helpers.go b/helpers.go
index e9a3a646..1401cbf2 100644
--- a/helpers.go
+++ b/helpers.go
@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
-	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -184,20 +183,6 @@ func structName(v reflect.Type) string {
 	return v.Name()
 }
 
-func sliceEq(left, right []string) bool {
-	if len(left) != len(right) {
-		return false
-	}
-	sort.Sort(sort.StringSlice(left))
-	sort.Sort(sort.StringSlice(right))
-	for i := 0; i < len(left); i++ {
-		if left[i] != right[i] {
-			return false
-		}
-	}
-	return true
-}
-
 func indexName(tableName, idxName string) string {
 	return fmt.Sprintf("IDX_%v_%v", tableName, idxName)
 }
diff --git a/internal/utils/slice.go b/internal/utils/slice.go
new file mode 100644
index 00000000..89685706
--- /dev/null
+++ b/internal/utils/slice.go
@@ -0,0 +1,22 @@
+// Copyright 2020 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package utils
+
+import "sort"
+
+// SliceEq return true if two slice have the same elements even if different sort.
+func SliceEq(left, right []string) bool {
+	if len(left) != len(right) {
+		return false
+	}
+	sort.Sort(sort.StringSlice(left))
+	sort.Sort(sort.StringSlice(right))
+	for i := 0; i < len(left); i++ {
+		if left[i] != right[i] {
+			return false
+		}
+	}
+	return true
+}
diff --git a/session_schema.go b/session_schema.go
index 629b127d..809f158f 100644
--- a/session_schema.go
+++ b/session_schema.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"strings"
 
+	"xorm.io/xorm/internal/utils"
 	"xorm.io/xorm/schemas"
 )
 
@@ -188,7 +189,7 @@ func (session *Session) isIndexExist2(tableName string, cols []string, unique bo
 	}
 
 	for _, index := range indexes {
-		if sliceEq(index.Cols, cols) {
+		if utils.SliceEq(index.Cols, cols) {
 			if unique {
 				return index.Type == schemas.UniqueType, nil
 			}
diff --git a/tags/tag_test.go b/tags/tag_test.go
index f4a79379..5775b40a 100644
--- a/tags/tag_test.go
+++ b/tags/tag_test.go
@@ -4,7 +4,11 @@
 
 package tags
 
-import "testing"
+import (
+	"testing"
+
+	"xorm.io/xorm/internal/utils"
+)
 
 func TestSplitTag(t *testing.T) {
 	var cases = []struct {
@@ -19,7 +23,7 @@ func TestSplitTag(t *testing.T) {
 
 	for _, kase := range cases {
 		tags := splitTag(kase.tag)
-		if !sliceEq(tags, kase.tags) {
+		if !utils.SliceEq(tags, kase.tags) {
 			t.Fatalf("[%d]%v is not equal [%d]%v", len(tags), tags, len(kase.tags), kase.tags)
 		}
 	}