You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pkg.go
    path of file: ./repos/bk-cmdb/src/scene_server/admin_server/upgrader/history/x18.11.19.01
    
    the code of the file until where you have to start completion: // Package x18_11_19_01 TODO
/*
 * Tencent is pleased to support the open source community by making 蓝鲸 available.
 * Copyright (C) 2017-2018 TH
    
func upgrade(ctx context.Context, db dal.RDB, conf *upgrader.Config) (err error) {
	err = createObjectUnitTable(ctx, db, conf)
	if err != nil {
		blog.Errorf("[upgrade x18.11.19.01] createObjectUnitTable error  %s", err.Error())
		return err
	}

	err = reconcilUnique(ctx, db, conf)
	if err != nil {
		blog.Errorf("[upgrade x18.11.19.01] reconcilUnique error  %s", err.Error())
		return err
	}
	// 产品调整，回撤
	// err = reconcilAsstID(ctx, db, conf)
	// if err != nil {
	// 	blog.Errorf("[upgrade x18.11.19.01] reconcilAsstID error  %s", err.Error())
	// 	return err
	// }
	return
}