start_deferred_wire_out.c (2058B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file exchangedb/start_deferred_wire_out.c 18 * @brief Implementation of the start_deferred_wire_out function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "exchange-database/start_deferred_wire_out.h" 22 #include "helper.h" 23 #include "exchange-database/preflight.h" 24 #include "exchange-database/rollback.h" 25 26 enum GNUNET_GenericReturnValue 27 TALER_TALER_EXCHANGEDB_start_deferred_wire_out (struct 28 TALER_EXCHANGEDB_PostgresContext 29 *pg) 30 { 31 struct GNUNET_PQ_ExecuteStatement es[] = { 32 GNUNET_PQ_make_execute ( 33 "START TRANSACTION ISOLATION LEVEL READ COMMITTED;"), 34 GNUNET_PQ_make_execute ("SET CONSTRAINTS ALL DEFERRED;"), 35 GNUNET_PQ_EXECUTE_STATEMENT_END 36 }; 37 38 if (GNUNET_SYSERR == 39 TALER_EXCHANGEDB_preflight (pg)) 40 return GNUNET_SYSERR; 41 if (GNUNET_OK != 42 GNUNET_PQ_exec_statements (pg->conn, 43 es)) 44 { 45 TALER_LOG_ERROR ( 46 "Failed to defer wire_out_ref constraint on transaction\n"); 47 GNUNET_break (0); 48 TALER_EXCHANGEDB_rollback (pg); 49 return GNUNET_SYSERR; 50 } 51 pg->transaction_name = "deferred wire out"; 52 GNUNET_log (GNUNET_ERROR_TYPE_INFO, 53 "Starting READ COMMITTED DEFERRED transaction `%s'\n", 54 pg->transaction_name); 55 return GNUNET_OK; 56 }