Fix issue 1205 (#1211)

* fix #1205

* move builder into stores

* remove xrom

* Remove unused code

* Remove unused code

* refactor builderx to builder

Co-authored-by: anqiansong <anqiansong@bytedance.com>

core/stores/builder/builder_test.go

@@ -0,0 +1,24 @@
+package builder
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type mockedUser struct {
+	ID       string `db:"id" json:"id,omitempty"`
+	UserName string `db:"user_name" json:"userName,omitempty"`
+	Sex      int    `db:"sex" json:"sex,omitempty"`
+	UUID     string `db:"uuid" uuid:"uuid,omitempty"`
+	Age      int    `db:"age" json:"age"`
+}
+
+func TestFieldNames(t *testing.T) {
+	t.Run("new", func(t *testing.T) {
+		var u mockedUser
+		out := RawFieldNames(&u)
+		expected := []string{"`id`", "`user_name`", "`sex`", "`uuid`", "`age`"}
+		assert.Equal(t, expected, out)
+	})
+}