pg_check_transfer_exists.c (2233B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2023 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 backenddb/pg_check_transfer_exists.c 18 * @brief Implementation of the check_transfer_exists function for Postgres 19 * @author Iván Ávalos 20 */ 21 #include "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_check_transfer_exists.h" 26 #include "pg_helper.h" 27 28 enum GNUNET_DB_QueryStatus 29 TMH_PG_check_transfer_exists (void *cls, 30 const char *instance_id, 31 uint64_t transfer_serial_id) 32 { 33 struct PostgresClosure *pg = cls; 34 struct GNUNET_PQ_QueryParam params[] = { 35 GNUNET_PQ_query_param_string (instance_id), 36 GNUNET_PQ_query_param_uint64 (&transfer_serial_id), 37 GNUNET_PQ_query_param_end 38 }; 39 struct GNUNET_PQ_ResultSpec rs[] = { 40 GNUNET_PQ_result_spec_end 41 }; 42 43 check_connection (pg); 44 PREPARE (pg, 45 "check_transfer_exists", 46 "SELECT" 47 " 1" 48 " FROM merchant_transfers" 49 " JOIN merchant_accounts" 50 " USING (account_serial)" 51 " WHERE" 52 " credit_serial=$2" 53 " AND" 54 " merchant_serial=" 55 " (SELECT merchant_serial" 56 " FROM merchant_instances" 57 " WHERE merchant_id=$1)"); 58 59 return GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 60 "check_transfer_exists", 61 params, 62 rs); 63 }