diff --git a/core/benchmark.sh b/core/benchmark.sh
new file mode 100755
index 00000000..eab9e57e
--- /dev/null
+++ b/core/benchmark.sh
@@ -0,0 +1 @@
+go test -v -bench=. -run=XXX
diff --git a/core/db.go b/core/db.go
index f3fbbd43..21d276f0 100644
--- a/core/db.go
+++ b/core/db.go
@@ -93,7 +93,7 @@ func (rs *Rows) ScanStruct2(dest interface{}) error {
 	if !ok {
 		cache = make(map[string]int)
 		for i := 0; i < vvv.NumField(); i++ {
-			cache[vvv.Type().Field(i).Name] = i
+			cache[rs.Mapper.Obj2Table(vvv.Type().Field(i).Name)] = i
 		}
 		fieldCacheMutex.Lock()
 		fieldCache[t] = cache
@@ -103,7 +103,7 @@ func (rs *Rows) ScanStruct2(dest interface{}) error {
 	newDest := make([]interface{}, len(cols))
 	var v EmptyScanner
 	for j, name := range cols {
-		if i, ok := cache[rs.Mapper.Table2Obj(name)]; ok {
+		if i, ok := cache[name]; ok {
 			newDest[j] = vvv.Field(i).Addr().Interface()
 		} else {
 			newDest[j] = &v
@@ -141,7 +141,8 @@ func (rs *Rows) ScanSlice(dest interface{}) error {
 		return err
 	}
 
-	for i, _ := range cols {
+	srcLen := vvv.Len()
+	for i := srcLen; i < len(cols); i++ {
 		vvv = reflect.Append(vvv, reflect.ValueOf(newDest[i]).Elem())
 	}
 	return nil
diff --git a/core/db_test.go b/core/db_test.go
index 1ea670a5..2d0e85c5 100644
--- a/core/db_test.go
+++ b/core/db_test.go
@@ -1,6 +1,8 @@
 package core
 
 import (
+	"errors"
+	"fmt"
 	"os"
 	"testing"
 
@@ -98,7 +100,10 @@ func BenchmarkStructQuery(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			//fmt.Println(user)
+			if user.Name != "xlw" {
+				fmt.Println(user)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 		rows.Close()
 	}
@@ -140,7 +145,10 @@ func BenchmarkStruct2Query(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			//fmt.Println(user)
+			if user.Name != "xlw" {
+				fmt.Println(user)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 		rows.Close()
 	}
@@ -186,7 +194,10 @@ func BenchmarkSliceQuery(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			//fmt.Println(slice)
+			if slice[1].(string) != "xlw" {
+				fmt.Println(slice)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 
 		rows.Close()
@@ -228,7 +239,10 @@ func BenchmarkMapInterfaceQuery(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			//fmt.Println(m)
+			if m["name"].(string) != "xlw" {
+				fmt.Println(m)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 
 		rows.Close()
@@ -270,9 +284,10 @@ func BenchmarkMapBytesQuery(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			/*for k, v := range m {
-				fmt.Printf("%v - %v\n", k, string(v))
-			}*/
+			if string(m["name"]) != "xlw" {
+				fmt.Println(m)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 
 		rows.Close()
@@ -314,9 +329,10 @@ func BenchmarkMapStringQuery(b *testing.B) {
 			if err != nil {
 				b.Error(err)
 			}
-			/*for k, v := range m {
-				fmt.Printf("%v - %v\n", k, v)
-			}*/
+			if m["name"] != "xlw" {
+				fmt.Println(m)
+				b.Error(errors.New("name should be xlw"))
+			}
 		}
 
 		rows.Close()