INVALID_CODE = -1

CONNECT_ERROR_CODE = 10001
CONNECTTION_NOT_FOUND_CODE = 10002
DB_ERROR_CODE = 10003

COLLECTION_NOT_FOUND_CODE = 20001
INVALID_ARGUMENT_CODE = 20002
INVALID_DATE_RANGE_CODE = 20003
INVALID_TOPK_CODE = 20004
SEARCH_PARAM_LOSS_CODE = 20005