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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 "platform.h" 22 : #include "taler_error_codes.h" 23 : #include "taler_dbevents.h" 24 : #include "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 31 121 : TEH_PG_start_deferred_wire_out (void *cls) 32 : { 33 121 : struct PostgresClosure *pg = cls; 34 121 : struct GNUNET_PQ_ExecuteStatement es[] = { 35 121 : GNUNET_PQ_make_execute ( 36 : "START TRANSACTION ISOLATION LEVEL READ COMMITTED;"), 37 121 : GNUNET_PQ_make_execute ("SET CONSTRAINTS ALL DEFERRED;"), 38 : GNUNET_PQ_EXECUTE_STATEMENT_END 39 : }; 40 : 41 121 : if (GNUNET_SYSERR == 42 121 : TEH_PG_preflight (pg)) 43 0 : return GNUNET_SYSERR; 44 121 : if (GNUNET_OK != 45 121 : GNUNET_PQ_exec_statements (pg->conn, 46 : es)) 47 : { 48 0 : TALER_LOG_ERROR ( 49 : "Failed to defer wire_out_ref constraint on transaction\n"); 50 0 : GNUNET_break (0); 51 0 : TEH_PG_rollback (pg); 52 0 : return GNUNET_SYSERR; 53 : } 54 121 : pg->transaction_name = "deferred wire out"; 55 121 : GNUNET_log (GNUNET_ERROR_TYPE_INFO, 56 : "Starting READ COMMITTED DEFERRED transaction `%s'\n", 57 : pg->transaction_name); 58 121 : return GNUNET_OK; 59 : }