diff --git a/pkg/meta/sql.go b/pkg/meta/sql.go
index 19d1763a21bb2b00f43c771d32d4c94de72dce89..eb5543417f259febe0b81416ef27542cd1156970 100644
--- a/pkg/meta/sql.go
+++ b/pkg/meta/sql.go
@@ -128,10 +128,10 @@ type dbMeta struct {
 
 func newSQLMeta(driver, dsn string, conf *Config) (*dbMeta, error) {
 	engine, err := xorm.NewEngine(driver, dsn)
-	engine.SetTableMapper(names.NewPrefixMapper(engine.GetTableMapper(), "jfs_"))
 	if err != nil {
 		return nil, fmt.Errorf("unable to use data source %s: %s", driver, err)
 	}
+	engine.SetTableMapper(names.NewPrefixMapper(engine.GetTableMapper(), "jfs_"))
 	if err = engine.Ping(); err != nil {
 		return nil, fmt.Errorf("ping database: %s", err)
 	}