start_read_committed.c (1875B)
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 src/donaudb/start_read_committed.c 18 * @brief Implementation of the start_read_committed function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include <donau_config.h> 22 #include <taler/taler_error_codes.h> 23 #include <taler/taler_dbevents.h> 24 #include <taler/taler_pq_lib.h> 25 #include "start_read_committed.h" 26 #include "preflight.h" 27 #include "helper.h" 28 29 enum GNUNET_GenericReturnValue 30 DONAUDB_start_read_committed (struct DONAUDB_PostgresContext *ctx, 31 const char *name) 32 { 33 struct GNUNET_PQ_ExecuteStatement es[] = { 34 GNUNET_PQ_make_execute ("START TRANSACTION ISOLATION LEVEL READ COMMITTED"), 35 GNUNET_PQ_EXECUTE_STATEMENT_END 36 }; 37 38 GNUNET_assert (NULL != name); 39 if (GNUNET_SYSERR == 40 DONAUDB_preflight (ctx)) 41 return GNUNET_SYSERR; 42 GNUNET_log (GNUNET_ERROR_TYPE_INFO, 43 "Starting READ COMMITTED transaction `%s`\n", 44 name); 45 if (GNUNET_OK != 46 GNUNET_PQ_exec_statements (ctx->conn, 47 es)) 48 { 49 TALER_LOG_ERROR ("Failed to start transaction\n"); 50 GNUNET_break (0); 51 return GNUNET_SYSERR; 52 } 53 ctx->transaction_name = name; 54 return GNUNET_OK; 55 }