diff --git a/dbpool.go b/dbpool.go
index 2aeda8d..5db62ff 100644
--- a/dbpool.go
+++ b/dbpool.go
@@ -6,13 +6,15 @@ import (
 	"strings"
 )
 
+type DBStyle int32
+
 const (
-	GO_STYLE_DB = 1
-	JS_STYLE_DB = 2
+	GO_STYLE_DB DBStyle = iota
+	JS_STYLE_DB
 )
 
 type dbPool struct {
-	style int32
+	style DBStyle
 	dataSourceHash map[string]*q5.Mysql
 }