diff --git a/dialects/dameng.go b/dialects/dameng.go
index 47eda0cb..15fc60c4 100644
--- a/dialects/dameng.go
+++ b/dialects/dameng.go
@@ -573,7 +573,7 @@ func (db *dameng) SQLType(c *schemas.Column) string {
 	var res string
 	switch t := c.SQLType.Name; t {
 	case schemas.TinyInt, "BYTE":
-		res = "TINYINT"
+		return "TINYINT"
 	case schemas.SmallInt, schemas.MediumInt, schemas.Int, schemas.Integer:
 		return "INTEGER"
 	case schemas.BigInt,
@@ -660,6 +660,12 @@ func (db *dameng) DropTableSQL(tableName string) (string, bool) {
 	return fmt.Sprintf("DROP TABLE %s", db.quoter.Quote(tableName)), false
 }
 
+// ModifyColumnSQL returns a SQL to modify SQL
+func (db *dameng) ModifyColumnSQL(tableName string, col *schemas.Column) string {
+	s, _ := ColumnString(db.dialect, col, false)
+	return fmt.Sprintf("ALTER TABLE %s MODIFY %s", tableName, s)
+}
+
 func (db *dameng) CreateTableSQL(ctx context.Context, queryer core.Queryer, table *schemas.Table, tableName string) (string, bool, error) {
 	if tableName == "" {
 		tableName = table.Name
@@ -675,6 +681,13 @@ func (db *dameng) CreateTableSQL(ctx context.Context, queryer core.Queryer, tabl
 
 	for i, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if col.SQLType.IsBool() && !col.DefaultIsEmpty {
+			if col.Default == "true" {
+				col.Default = "1"
+			} else if col.Default == "false" {
+				col.Default = "0"
+			}
+		}
 		s, _ := ColumnString(db, col, false)
 		b.WriteString(s)
 		if i != len(table.ColumnsSeq())-1 {
@@ -792,6 +805,16 @@ func (d *dmClobScanner) Scan(data interface{}) error {
 	}
 }
 
+func addSingleQuote(name string) string {
+	if len(name) < 2 {
+		return name
+	}
+	if name[0] == '\'' && name[len(name)-1] == '\'' {
+		return name
+	}
+	return fmt.Sprintf("'%s'", name)
+}
+
 func (db *dameng) GetColumns(queryer core.Queryer, ctx context.Context, tableName string) ([]string, map[string]*schemas.Column, error) {
 	s := `select   column_name   from   user_cons_columns   
   where   constraint_name   =   (select   constraint_name   from   user_constraints   
@@ -931,7 +954,7 @@ func (db *dameng) GetColumns(queryer core.Queryer, ctx context.Context, tableNam
 
 		if col.SQLType.IsText() || col.SQLType.IsTime() {
 			if !col.DefaultIsEmpty {
-				col.Default = "'" + col.Default + "'"
+				col.Default = addSingleQuote(col.Default)
 			}
 		}
 		cols[col.Name] = col
@@ -1102,6 +1125,9 @@ func (d *damengDriver) Scan(ctx *ScanContext, rows *core.Rows, types []*sql.Colu
 		case "CLOB", "TEXT":
 			scanResult = &dmClobScanner{}
 			replaced = true
+		case "TIMESTAMP":
+			scanResult = &sql.NullString{}
+			replaced = true
 		default:
 			scanResult = v
 		}
@@ -1122,6 +1148,16 @@ func (d *damengDriver) Scan(ctx *ScanContext, rows *core.Rows, types []*sql.Colu
 					return err
 				}
 			default:
+				switch types[i].DatabaseTypeName() {
+				case "TIMESTAMP":
+					ns := t.(*sql.NullString)
+					if !ns.Valid {
+						return nil
+					}
+					s := ns.String
+					fields := strings.Split(s, "+")
+					return convert.Assign(vv[i], strings.Replace(fields[0], "T", " ", -1), ctx.DBLocation, ctx.UserLocation)
+				}
 				return fmt.Errorf("don't support convert %T to %T", t, vv[i])
 			}
 		}
diff --git a/dialects/dialect.go b/dialects/dialect.go
index d62b00a6..6d616535 100644
--- a/dialects/dialect.go
+++ b/dialects/dialect.go
@@ -45,6 +45,7 @@ const (
 
 type DialectFeatures struct {
 	AutoincrMode int // 0 autoincrement column, 1 sequence
+	AliasKeyword string
 }
 
 // Dialect represents a kind of database
diff --git a/integrations/session_insert_test.go b/integrations/session_insert_test.go
index 8f8693d5..feeaa5cf 100644
--- a/integrations/session_insert_test.go
+++ b/integrations/session_insert_test.go
@@ -746,6 +746,11 @@ func TestInsertWhere(t *testing.T) {
 	i.Index = 1
 	assert.EqualValues(t, i, j)
 
+	if testEngine.Dialect().URI().DBType == schemas.DAMENG {
+		t.SkipNow()
+		return
+	}
+
 	inserted, err = testEngine.Table(new(InsertWhere)).Where("`repo_id`=?", 1).
 		SetExpr("`index`", "coalesce(MAX(`index`),0)+1").
 		Insert(map[string]interface{}{
@@ -852,6 +857,11 @@ func TestInsertExpr2(t *testing.T) {
 	assert.EqualValues(t, 1, ie2.RepoId)
 	assert.EqualValues(t, true, ie2.IsTag)
 
+	if testEngine.Dialect().URI().DBType == schemas.DAMENG {
+		t.SkipNow()
+		return
+	}
+
 	inserted, err = testEngine.Table(new(InsertExprsRelease)).
 		SetExpr("is_draft", true).
 		SetExpr("num_commits", 0).
diff --git a/integrations/session_tx_test.go b/integrations/session_tx_test.go
index 0ab823d8..2bdfe0c0 100644
--- a/integrations/session_tx_test.go
+++ b/integrations/session_tx_test.go
@@ -73,7 +73,7 @@ func TestCombineTransaction(t *testing.T) {
 	_, err = session.Where("`id` = ?", 0).Update(&user2)
 	assert.NoError(t, err)
 
-	_, err = session.Exec("delete from "+testEngine.TableName("userinfo", true)+" where `username` = ?", user2.Username)
+	_, err = session.Exec("delete from `"+testEngine.TableName("userinfo", true)+"` where `username` = ?", user2.Username)
 	assert.NoError(t, err)
 
 	err = session.Commit()
diff --git a/integrations/session_update_test.go b/integrations/session_update_test.go
index f1150306..4312d0e0 100644
--- a/integrations/session_update_test.go
+++ b/integrations/session_update_test.go
@@ -93,7 +93,12 @@ func TestUpdateLimit(t *testing.T) {
 	assert.NoError(t, err)
 	assert.EqualValues(t, 1, cnt)
 
-	cnt, err = testEngine.OrderBy("name desc").Limit(1).Update(&UpdateTable2{
+	if testEngine.Dialect().URI().DBType == schemas.DAMENG {
+		t.SkipNow()
+		return
+	}
+
+	cnt, err = testEngine.OrderBy("`name` desc").Limit(1).Update(&UpdateTable2{
 		Age: 30,
 	})
 	assert.NoError(t, err)
@@ -345,11 +350,11 @@ func TestUpdate1(t *testing.T) {
 		userID := user.Uid
 
 		has, err := testEngine.ID(userID).
-			And("username = ?", user.Username).
-			And("height = ?", user.Height).
-			And("departname = ?", "").
-			And("detail_id = ?", 0).
-			And("is_man = ?", false).
+			And("`username` = ?", user.Username).
+			And("`height` = ?", user.Height).
+			And("`departname` = ?", "").
+			And("`detail_id` = ?", 0).
+			And("`is_man` = ?", false).
 			Get(&Userinfo{})
 		assert.NoError(t, err)
 		assert.True(t, has, "cannot insert properly")
@@ -362,12 +367,12 @@ func TestUpdate1(t *testing.T) {
 		assert.EqualValues(t, 1, cnt, "update not returned 1")
 
 		has, err = testEngine.ID(userID).
-			And("username = ?", updatedUser.Username).
-			And("height IS NULL").
-			And("departname IS NULL").
-			And("is_man IS NULL").
-			And("created IS NULL").
-			And("detail_id = ?", 0).
+			And("`username` = ?", updatedUser.Username).
+			And("`height` IS NULL").
+			And("`departname` IS NULL").
+			And("`is_man` IS NULL").
+			And("`created` IS NULL").
+			And("`detail_id` = ?", 0).
 			Get(&Userinfo{})
 		assert.NoError(t, err)
 		assert.True(t, has, "cannot update with null properly")
@@ -1166,7 +1171,7 @@ func TestUpdateExprs(t *testing.T) {
 	})
 	assert.NoError(t, err)
 
-	_, err = testEngine.SetExpr("num_issues", "num_issues+1").AllCols().Update(&UpdateExprs{
+	_, err = testEngine.SetExpr("num_issues", "`num_issues`+1").AllCols().Update(&UpdateExprs{
 		NumIssues: 3,
 		Name:      "lunny xiao",
 	})
@@ -1197,7 +1202,7 @@ func TestUpdateAlias(t *testing.T) {
 	})
 	assert.NoError(t, err)
 
-	_, err = testEngine.Alias("ua").Where("`ua`.`id` = ?", 1).Update(&UpdateAlias{
+	_, err = testEngine.Alias("ua").Where("ua.`id` = ?", 1).Update(&UpdateAlias{
 		NumIssues: 2,
 		Name:      "lunny xiao",
 	})
@@ -1257,6 +1262,11 @@ func TestUpdateExprs2(t *testing.T) {
 }
 
 func TestUpdateMap3(t *testing.T) {
+	if testEngine.Dialect().URI().DBType == schemas.DAMENG {
+		t.SkipNow()
+		return
+	}
+
 	assert.NoError(t, PrepareEngine())
 
 	type UpdateMapUser struct {
diff --git a/scan.go b/scan.go
index 56d3c9d6..2788453e 100644
--- a/scan.go
+++ b/scan.go
@@ -136,7 +136,10 @@ func (engine *Engine) row2mapStr(rows *core.Rows, types []*sql.ColumnType, field
 		scanResults[i] = &s
 	}
 
-	if err := rows.Scan(scanResults...); err != nil {
+	if err := engine.driver.Scan(&dialects.ScanContext{
+		DBLocation:   engine.DatabaseTZ,
+		UserLocation: engine.TZLocation,
+	}, rows, types, scanResults...); err != nil {
 		return nil, err
 	}
 
diff --git a/session_update.go b/session_update.go
index 7d91346e..4fd45a53 100644
--- a/session_update.go
+++ b/session_update.go
@@ -278,7 +278,11 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 		condBeanIsStruct := false
 		if len(condiBean) > 0 {
 			if c, ok := condiBean[0].(map[string]interface{}); ok {
-				autoCond = builder.Eq(c)
+				var eq = make(builder.Eq)
+				for k, v := range c {
+					eq[session.engine.Quote(k)] = v
+				}
+				autoCond = builder.Eq(eq)
 			} else {
 				ct := reflect.TypeOf(condiBean[0])
 				k := ct.Kind()