private OperationSavedMapper getMapper() {
        return Dbutils.getMapper(OperationSavedMapper.class);
    }
@author moji
@version UserSavedDdlCoreServiceImpl.java, v 0.1 September 25, 2022 15:50 moji Exp $
@date 2022/09/25
chat2db-server/chat2db-server-domain/chat2db-server-domain-core/src/main/java/ai/chat2db/server/domain/core/impl/OperationServiceImpl.java