select_historic_denom_revenue.c (4992B)
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 select_historic_denom_revenue.c 18 * @brief Low-level (statement-level) Postgres database access for the exchange 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "auditor-database/select_historic_denom_revenue.h" 23 #include "pg_helper.h" 24 25 26 /** 27 * Closure for #historic_denom_revenue_cb(). 28 */ 29 struct HistoricDenomRevenueContext 30 { 31 /** 32 * Function to call for each result. 33 */ 34 TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb; 35 36 /** 37 * Closure for @e cb. 38 */ 39 void *cb_cls; 40 41 /** 42 * Plugin context. 43 */ 44 struct TALER_AUDITORDB_PostgresContext *pg; 45 46 /** 47 * Number of results processed. 48 */ 49 enum GNUNET_DB_QueryStatus qs; 50 }; 51 52 53 /** 54 * Helper function for #TALER_AUDITORDB_select_historic_denom_revenue(). 55 * To be called with the results of a SELECT statement 56 * that has returned @a num_results results. 57 * 58 * @param cls closure of type `struct HistoricRevenueContext *` 59 * @param result the postgres result 60 * @param num_results the number of results in @a result 61 */ 62 static void 63 historic_denom_revenue_cb (void *cls, 64 PGresult *result, 65 unsigned int num_results) 66 { 67 struct HistoricDenomRevenueContext *hrc = cls; 68 struct TALER_AUDITORDB_PostgresContext *pg = hrc->pg; 69 70 for (unsigned int i = 0; i < num_results; i++) 71 { 72 uint64_t rowid; 73 struct TALER_DenominationHashP denom_pub_hash; 74 struct GNUNET_TIME_Timestamp revenue_timestamp; 75 struct TALER_Amount revenue_balance; 76 struct TALER_Amount loss; 77 struct GNUNET_PQ_ResultSpec rs[] = { 78 GNUNET_PQ_result_spec_uint64 ("row_id", 79 &rowid), 80 GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash", 81 &denom_pub_hash), 82 GNUNET_PQ_result_spec_timestamp ("revenue_timestamp", 83 &revenue_timestamp), 84 TALER_PQ_RESULT_SPEC_AMOUNT ("revenue_balance", 85 &revenue_balance), 86 TALER_PQ_RESULT_SPEC_AMOUNT ("loss_balance", 87 &loss), 88 GNUNET_PQ_result_spec_end 89 }; 90 91 if (GNUNET_OK != 92 GNUNET_PQ_extract_result (result, 93 rs, 94 i)) 95 { 96 GNUNET_break (0); 97 hrc->qs = GNUNET_DB_STATUS_HARD_ERROR; 98 return; 99 } 100 101 hrc->qs = i + 1; 102 if (GNUNET_OK != 103 hrc->cb (hrc->cb_cls, 104 rowid, 105 &denom_pub_hash, 106 revenue_timestamp, 107 &revenue_balance, 108 &loss)) 109 break; 110 } 111 } 112 113 114 enum GNUNET_DB_QueryStatus 115 TALER_AUDITORDB_select_historic_denom_revenue ( 116 struct TALER_AUDITORDB_PostgresContext *pg, 117 int64_t limit, 118 uint64_t offset, 119 TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb, 120 void *cb_cls) 121 { 122 uint64_t ulimit = (limit > 0) ? limit : -limit; 123 struct GNUNET_PQ_QueryParam params[] = { 124 GNUNET_PQ_query_param_uint64 (&offset), 125 GNUNET_PQ_query_param_uint64 (&ulimit), 126 GNUNET_PQ_query_param_end 127 }; 128 struct HistoricDenomRevenueContext hrc = { 129 .cb = cb, 130 .cb_cls = cb_cls, 131 .pg = pg 132 }; 133 enum GNUNET_DB_QueryStatus qs; 134 135 PREPARE (pg, 136 "auditor_historic_denomination_revenue_select_inc", 137 "SELECT" 138 " row_id" 139 ",denom_pub_hash" 140 ",revenue_timestamp" 141 ",revenue_balance" 142 ",loss_balance" 143 " FROM auditor_historic_denomination_revenue" 144 " WHERE row_id > $1" 145 " ORDER BY row_id ASC" 146 " LIMIT $2;"); 147 PREPARE (pg, 148 "auditor_historic_denomination_revenue_select_dec", 149 "SELECT" 150 " row_id" 151 ",denom_pub_hash" 152 ",revenue_timestamp" 153 ",revenue_balance" 154 ",loss_balance" 155 " FROM auditor_historic_denomination_revenue" 156 " WHERE row_id < $1" 157 " ORDER BY row_id DESC" 158 " LIMIT $2;"); 159 qs = GNUNET_PQ_eval_prepared_multi_select ( 160 pg->conn, 161 limit > 0 162 ? "auditor_historic_denomination_revenue_select_inc" 163 : "auditor_historic_denomination_revenue_select_dec", 164 params, 165 &historic_denom_revenue_cb, 166 &hrc); 167 if (qs <= 0) 168 return qs; 169 return hrc.qs; 170 }