diff --git a/builder2.go b/builder2.go
index b51a596..1757a22 100644
--- a/builder2.go
+++ b/builder2.go
@@ -67,6 +67,9 @@ func (b *Builder2) Sql() (string, error) {
 	}
 
 	filterSql, err := toWhereSql(b.Filter)
+	if err != nil {
+		return "", err
+	}
 
 	sql := fmt.Sprintf("select %s from %s ", selectSql, fromSql)
 	if joinSql != "" {
@@ -226,6 +229,9 @@ func toWhereSql(where interface{}) (string, error) {
 
 	//[ "a=","1","and",[["c=","3"],"and",["d=","4"]],"or",["b=","2"]]
 	if whereGjson.IsArray() {
+		if len(whereGjson.Array()) == 0 {
+			return "", nil
+		}
 		ws := []string{}
 		expression := whereGjson.Array()
 
@@ -277,6 +283,10 @@ func toWhereSql(where interface{}) (string, error) {
 			// }
 		}
 	} else if whereGjson.IsObject() {
+		if len(whereGjson.Map()) == 0 {
+			return "", nil
+		}
+
 		newValue := []interface{}{
 			"and",
 		}