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: add_aix_property.go
    path of file: ./repos/bk-cmdb/src/scene_server/admin_server/upgrader/history/x18.12.12.01
    
    the code of the file until where you have to start completion: // Package x18_12_12_01 TODO
/*
 * Tencent is pleased to support the open source community by making 蓝鲸 available.
 * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
 * Licensed under the MIT License (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * http://opensource.org/licenses/MIT
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the Lic
    
func addAIXProperty(ctx context.Context, db dal.RDB, conf *upgrader.Config) error {

	cond := condition.CreateCondition()
	cond.Field(common.BKOwnerIDField).Eq(common.BKDefaultOwnerID)
	cond.Field(common.BKObjIDField).Eq(common.BKInnerObjIDHost)
	cond.Field(common.BKPropertyIDField).Eq(common.BKOSTypeField)

	ostypeProperty := Attribute{}
	err := db.Table(common.BKTableNameObjAttDes).Find(cond.ToMapStr()).One(ctx, &ostypeProperty)
	if err != nil {
		return err
	}

	enumOpts, err := metadata.ParseEnumOption(ostypeProperty.Option)
	if err != nil {
		return err
	}
	for _, enum := range enumOpts {
		if enum.ID == "3" {
			return nil
		}
	}

	aixEnum := metadata.EnumVal{
		ID:   "3",
		Name: "AIX",
		Type: "text",
	}
	enumOpts = append(enumOpts, aixEnum)

	data := mapstr.MapStr{
		common.BKOptionField: enumOpts,
	}

	err = db.Table(common.BKTableNameObjAttDes).Update(ctx, cond.ToMapStr(), data)
	if err != nil {
		return err
	}
	return nil
}