pg_start_deferred_wire_out.c (2020B)
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/pg_start_deferred_wire_out.c 18 * @brief Implementation of the start_deferred_wire_out function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/platform.h" 22 #include "taler/taler_error_codes.h" 23 #include "taler/taler_dbevents.h" 24 #include "taler/taler_pq_lib.h" 25 #include "pg_start_deferred_wire_out.h" 26 #include "pg_helper.h" 27 #include "pg_preflight.h" 28 #include "pg_rollback.h" 29 30 enum GNUNET_GenericReturnValue 31 TEH_PG_start_deferred_wire_out (void *cls) 32 { 33 struct PostgresClosure *pg = cls; 34 struct GNUNET_PQ_ExecuteStatement es[] = { 35 GNUNET_PQ_make_execute ( 36 "START TRANSACTION ISOLATION LEVEL READ COMMITTED;"), 37 GNUNET_PQ_make_execute ("SET CONSTRAINTS ALL DEFERRED;"), 38 GNUNET_PQ_EXECUTE_STATEMENT_END 39 }; 40 41 if (GNUNET_SYSERR == 42 TEH_PG_preflight (pg)) 43 return GNUNET_SYSERR; 44 if (GNUNET_OK != 45 GNUNET_PQ_exec_statements (pg->conn, 46 es)) 47 { 48 TALER_LOG_ERROR ( 49 "Failed to defer wire_out_ref constraint on transaction\n"); 50 GNUNET_break (0); 51 TEH_PG_rollback (pg); 52 return GNUNET_SYSERR; 53 } 54 pg->transaction_name = "deferred wire out"; 55 GNUNET_log (GNUNET_ERROR_TYPE_INFO, 56 "Starting READ COMMITTED DEFERRED transaction `%s'\n", 57 pg->transaction_name); 58 return GNUNET_OK; 59 }