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/*
This file is part of GNUnet
Copyright (C) 2017 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
*/
/**
* @file include/gnunet_db_lib.h
* @brief shared defintions for transactional databases
* @author Christian Grothoff
*/
#ifndef GNUNET_DB_LIB_H
#define GNUNET_DB_LIB_H
/**
* Status code returned from functions running database commands.
* Can be combined with a function that returns the number
* of results, so all non-negative values indicate success.
*/
enum GNUNET_DB_QueryStatus
{
/**
* A hard error occurred, retrying will not help.
*/
GNUNET_DB_STATUS_HARD_ERROR = -2,
/**
* A soft error occurred, retrying the transaction may succeed.
* Includes DEADLOCKS and SERIALIZATION errors.
*/
GNUNET_DB_STATUS_SOFT_ERROR = -1,
/**
* The transaction succeeded, but yielded zero results.
* May include the case where an INSERT failed with UNIQUE
* violation (i.e. row already exists) or where DELETE
* failed to remove anything (i.e. nothing matched).
*/
GNUNET_DB_STATUS_SUCCESS_NO_RESULTS = 0,
/**
* The transaction succeeded, and yielded one result.
*/
GNUNET_DB_STATUS_SUCCESS_ONE_RESULT = 1
/* Larger values may be returned for SELECT statements
that returned more than one result. */
};
#endif
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