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: identifier.go
    path of file: ./repos/bk-cmdb/src/source_controller/coreservice/core/datasynchronize
    
    the code of the file until where you have to start completion: /*
 * 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 com
    
func (s *setIdentifierFlag) dbCollectionInfo(kit *rest.Kit) errors.CCErrorCoder {
	switch s.params.DataType {
	case metadata.SynchronizeOperateDataTypeInstance:
		// TODO: 需要上传修改
		s.tableName = common.GetInstTableName(s.params.DataClassify, kit.SupplierAccount)
		s.instIDField = common.GetInstIDField(s.params.DataClassify)

	default:
		// not suuport DataType
		blog.Errorf(" not support data_type. input:%#v, rid:%s", s.params, kit.Rid)
		return kit.CCError.CCErrorf(common.CCErrCommParamsValueInvalidError, "data_type", s.params.DataType)

	}

	return nil
}