diff --git a/engine.go b/engine.go
index 2499d494..6f7c3a32 100644
--- a/engine.go
+++ b/engine.go
@@ -481,7 +481,9 @@ func (engine *Engine) mapType(v reflect.Value) *Table {
 	table := engine.newTable()
 	method := v.MethodByName("TableName")
 	if !method.IsValid() {
-		method = v.Addr().MethodByName("TableName")
+		if v.CanAddr() {
+			method = v.Addr().MethodByName("TableName")
+		}
 	}
 	if method.IsValid() {
 		params := []reflect.Value{}
diff --git a/session.go b/session.go
index 078903a5..2298e839 100644
--- a/session.go
+++ b/session.go
@@ -2934,7 +2934,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 			session.Engine.Quote(table.Version)+" = "+session.Engine.Quote(table.Version)+" + 1",
 			condition)
 
-		verValue = table.VersionColumn().ValueOf(bean) 
+		verValue = table.VersionColumn().ValueOf(bean)
 		//if err != nil {
 		//	return 0, err
 		//}
diff --git a/statement.go b/statement.go
index 773dd378..713e8637 100644
--- a/statement.go
+++ b/statement.go
@@ -523,6 +523,9 @@ func (statement *Statement) Cols(columns ...string) *Statement {
 		statement.columnMap[strings.ToLower(nc)] = true
 	}
 	statement.ColumnStr = statement.Engine.Quote(strings.Join(newColumns, statement.Engine.Quote(", ")))
+	if strings.Contains(statement.ColumnStr, ".") {
+		statement.ColumnStr = strings.Replace(statement.ColumnStr, ".", statement.Engine.Quote("."), -1)
+	}
 	return statement
 }