pg_select_reserves_in_above_serial_id.c (4995B)
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_select_reserves_in_above_serial_id.c 18 * @brief Implementation of the select_reserves_in_above_serial_id 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_select_reserves_in_above_serial_id.h" 26 #include "pg_helper.h" 27 28 /** 29 * Closure for #reserves_in_serial_helper_cb(). 30 */ 31 struct ReservesInSerialContext 32 { 33 34 /** 35 * Callback to call. 36 */ 37 TALER_EXCHANGEDB_ReserveInCallback cb; 38 39 /** 40 * Closure for @e cb. 41 */ 42 void *cb_cls; 43 44 /** 45 * Plugin context. 46 */ 47 struct PostgresClosure *pg; 48 49 /** 50 * Status code, set to #GNUNET_SYSERR on hard errors. 51 */ 52 enum GNUNET_GenericReturnValue status; 53 }; 54 55 56 /** 57 * Helper function to be called with the results of a SELECT statement 58 * that has returned @a num_results results. 59 * 60 * @param cls closure of type `struct ReservesInSerialContext` 61 * @param result the postgres result 62 * @param num_results the number of results in @a result 63 */ 64 static void 65 reserves_in_serial_helper_cb (void *cls, 66 PGresult *result, 67 unsigned int num_results) 68 { 69 struct ReservesInSerialContext *risc = cls; 70 struct PostgresClosure *pg = risc->pg; 71 72 for (unsigned int i = 0; i<num_results; i++) 73 { 74 struct TALER_ReservePublicKeyP reserve_pub; 75 struct TALER_Amount credit; 76 struct TALER_FullPayto sender_account_details; 77 struct GNUNET_TIME_Timestamp execution_date; 78 uint64_t rowid; 79 uint64_t wire_reference; 80 struct GNUNET_PQ_ResultSpec rs[] = { 81 GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", 82 &reserve_pub), 83 GNUNET_PQ_result_spec_uint64 ("wire_reference", 84 &wire_reference), 85 TALER_PQ_RESULT_SPEC_AMOUNT ("credit", 86 &credit), 87 GNUNET_PQ_result_spec_timestamp ("execution_date", 88 &execution_date), 89 GNUNET_PQ_result_spec_string ("sender_account_details", 90 &sender_account_details.full_payto), 91 GNUNET_PQ_result_spec_uint64 ("reserve_in_serial_id", 92 &rowid), 93 GNUNET_PQ_result_spec_end 94 }; 95 enum GNUNET_GenericReturnValue ret; 96 97 if (GNUNET_OK != 98 GNUNET_PQ_extract_result (result, 99 rs, 100 i)) 101 { 102 GNUNET_break (0); 103 risc->status = GNUNET_SYSERR; 104 return; 105 } 106 ret = risc->cb (risc->cb_cls, 107 rowid, 108 &reserve_pub, 109 &credit, 110 sender_account_details, 111 wire_reference, 112 execution_date); 113 GNUNET_PQ_cleanup_result (rs); 114 if (GNUNET_OK != ret) 115 break; 116 } 117 } 118 119 120 enum GNUNET_DB_QueryStatus 121 TEH_PG_select_reserves_in_above_serial_id ( 122 void *cls, 123 uint64_t serial_id, 124 TALER_EXCHANGEDB_ReserveInCallback cb, 125 void *cb_cls) 126 { 127 struct PostgresClosure *pg = cls; 128 struct GNUNET_PQ_QueryParam params[] = { 129 GNUNET_PQ_query_param_uint64 (&serial_id), 130 GNUNET_PQ_query_param_end 131 }; 132 struct ReservesInSerialContext risc = { 133 .cb = cb, 134 .cb_cls = cb_cls, 135 .pg = pg, 136 .status = GNUNET_OK 137 }; 138 enum GNUNET_DB_QueryStatus qs; 139 140 PREPARE (pg, 141 "select_reserves_in_above_serial_id", 142 "SELECT" 143 " reserves.reserve_pub" 144 ",wire_reference" 145 ",credit" 146 ",execution_date" 147 ",wt.payto_uri AS sender_account_details" 148 ",reserve_in_serial_id" 149 " FROM reserves_in" 150 " JOIN reserves" 151 " USING (reserve_pub)" 152 " JOIN wire_targets wt" 153 " ON (wire_source_h_payto = wire_target_h_payto)" 154 " WHERE reserve_in_serial_id>=$1" 155 " ORDER BY reserve_in_serial_id;"); 156 qs = GNUNET_PQ_eval_prepared_multi_select ( 157 pg->conn, 158 "select_reserves_in_above_serial_id", 159 params, 160 &reserves_in_serial_helper_cb, 161 &risc); 162 if (GNUNET_DB_STATUS_SOFT_ERROR == qs) 163 return qs; 164 if (GNUNET_OK != risc.status) 165 return GNUNET_DB_STATUS_HARD_ERROR; 166 return qs; 167 }