diff --git a/engine.go b/engine.go
index 2b1408bf..17d16063 100644
--- a/engine.go
+++ b/engine.go
@@ -1545,11 +1545,7 @@ func (engine *Engine) formatTime(sqlTypeName string, t time.Time) (v interface{}
 	case core.Date:
 		v = t.Format("2006-01-02")
 	case core.DateTime, core.TimeStamp:
-		v = t.Format("2006-01-02 15:04:05.999")
-
-		if engine.dialect.DBType() == "sqlite3" {
-			v = t.UTC().Format("2006-01-02 15:04:05.999")
-		}
+		v = t.Format("2006-01-02 15:04:05")
 	case core.TimeStampz:
 		if engine.dialect.DBType() == core.MSSQL {
 			v = t.Format("2006-01-02T15:04:05.9999999Z07:00")
diff --git a/ge_session.go b/ge_session.go
index 3c8d066b..d8dabbd1 100644
--- a/ge_session.go
+++ b/ge_session.go
@@ -444,7 +444,7 @@ func (ges *GESession) NoAutoTime() *GESession {
 // and cannot use Where, Id, In and etc. Methods to describe, you can use SQL.
 //
 // Deprecated: use SQL instead.
-func (ges *GESession) Sql(query interface{}, args ...interface{}) *GESession {
+func (ges *GESession) Sql(query string, args ...interface{}) *GESession {
 	ges.operation = append(ges.operation, "Sql")
 	sqlArgs := SqlArgs{
 		query: query,
@@ -454,11 +454,16 @@ func (ges *GESession) Sql(query interface{}, args ...interface{}) *GESession {
 	return ges
 }
 
+type SQLArgs struct {
+	query interface{}
+	args  []interface{}
+}
+
 // SQL provides raw sql input parameter. When you have a complex SQL statement
 // and cannot use Where, Id, In and etc. Methods to describe, you can use SQL.
 func (ges *GESession) SQL(query interface{}, args ...interface{}) *GESession {
 	ges.operation = append(ges.operation, "SQL")
-	sqlArgs := SqlArgs{
+	sqlArgs := SQLArgs{
 		query: query,
 		args:  args,
 	}
@@ -577,7 +582,6 @@ func (ges *GESession) Exist(bean ...interface{}) (bool, error) {
 	return session.Exist(bean...)
 }
 
-//TODO 缺少前置session操作链
 // Find retrieve records from table, condiBeans's non-empty fields
 // are conditions. beans could be []Struct, []*Struct, map[int64]Struct
 // map[int64]*Struct
@@ -588,7 +592,6 @@ func (ges *GESession) Find(rowsSlicePtr interface{}, condiBean ...interface{}) e
 	return session.Find(rowsSlicePtr, condiBean...)
 }
 
-//TODO 缺少前置session操作链
 // Get retrieve one record from database, bean's non-empty fields
 // will be as conditions
 func (ges *GESession) Get(bean interface{}) (bool, error) {
@@ -598,7 +601,6 @@ func (ges *GESession) Get(bean interface{}) (bool, error) {
 	return session.Get(bean)
 }
 
-//TODO 缺少前置session操作链
 // Insert insert one or more beans
 func (ges *GESession) Insert(beans ...interface{}) (int64, error) {
 	session := ges.ge.Master().NewSession()
diff --git a/group_engine.go b/group_engine.go
index dff4f368..1c667f95 100644
--- a/group_engine.go
+++ b/group_engine.go
@@ -167,11 +167,11 @@ func (ge *GroupEngine) NewGESession() *GESession {
 }
 
 type SqlArgs struct {
-	query interface{}
+	query string
 	args  []interface{}
 }
 
-func (ge *GroupEngine) Sql(query interface{}, args ...interface{}) *GESession {
+func (ge *GroupEngine) Sql(query string, args ...interface{}) *GESession {
 	ges := ge.NewGESession()
 	return ges.Sql(query, args...)
 }
diff --git a/session_cond.go b/session_cond.go
index 15d036d2..e1d528f2 100644
--- a/session_cond.go
+++ b/session_cond.go
@@ -10,7 +10,7 @@ import "github.com/go-xorm/builder"
 // and cannot use Where, Id, In and etc. Methods to describe, you can use SQL.
 //
 // Deprecated: use SQL instead.
-func (session *Session) Sql(query interface{}, args ...interface{}) *Session {
+func (session *Session) Sql(query string, args ...interface{}) *Session {
 	return session.SQL(query, args...)
 }