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7 by the Free Software Foundation, either version 3 of the License,
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16 * @file include/gnunet_db_lib.h
17 * @brief shared defintions for transactional databases
18 * @author Christian Grothoff
20 #ifndef GNUNET_DB_LIB_H
21 #define GNUNET_DB_LIB_H
25 * Status code returned from functions running database commands.
26 * Can be combined with a function that returns the number
27 * of results, so all non-negative values indicate success.
29 enum GNUNET_DB_QueryStatus
32 * A hard error occurred, retrying will not help.
34 GNUNET_DB_STATUS_HARD_ERROR = -2,
37 * A soft error occurred, retrying the transaction may succeed.
38 * Includes DEADLOCKS and SERIALIZATION errors.
40 GNUNET_DB_STATUS_SOFT_ERROR = -1,
43 * The transaction succeeded, but yielded zero results.
44 * May include the case where an INSERT failed with UNIQUE
45 * violation (i.e. row already exists) or where DELETE
46 * failed to remove anything (i.e. nothing matched).
48 GNUNET_DB_STATUS_SUCCESS_NO_RESULTS = 0,
51 * The transaction succeeded, and yielded one result.
53 GNUNET_DB_STATUS_SUCCESS_ONE_RESULT = 1
55 /* Larger values may be returned for SELECT statements
56 that returned more than one result. */