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3 Copyright (C) 2017 GNUnet e.V.
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6 under the terms of the GNU Affero General Public License as published
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19 * @file include/gnunet_db_lib.h
20 * @brief shared defintions for transactional databases
21 * @author Christian Grothoff
23 #ifndef GNUNET_DB_LIB_H
24 #define GNUNET_DB_LIB_H
28 * Status code returned from functions running database commands.
29 * Can be combined with a function that returns the number
30 * of results, so all non-negative values indicate success.
32 enum GNUNET_DB_QueryStatus
35 * A hard error occurred, retrying will not help.
37 GNUNET_DB_STATUS_HARD_ERROR = -2,
40 * A soft error occurred, retrying the transaction may succeed.
41 * Includes DEADLOCKS and SERIALIZATION errors.
43 GNUNET_DB_STATUS_SOFT_ERROR = -1,
46 * The transaction succeeded, but yielded zero results.
47 * May include the case where an INSERT failed with UNIQUE
48 * violation (i.e. row already exists) or where DELETE
49 * failed to remove anything (i.e. nothing matched).
51 GNUNET_DB_STATUS_SUCCESS_NO_RESULTS = 0,
54 * The transaction succeeded, and yielded one result.
56 GNUNET_DB_STATUS_SUCCESS_ONE_RESULT = 1
58 /* Larger values may be returned for SELECT statements
59 that returned more than one result. */