iterate_historic_reserve_revenue.c (4950B)
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 iterate_historic_reserve_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/iterate_historic_reserve_revenue.h" 23 #include "pg_helper.h" 24 25 26 /** 27 * Hard upper bound on the number of records returned by a single 28 * call, regardless of the limit requested by the client. 29 */ 30 #define MAX_RECORDS 50000 31 32 33 /** 34 * Closure for #historic_reserve_revenue_cb(). 35 */ 36 struct HistoricReserveRevenueContext 37 { 38 /** 39 * Function to call for each result. 40 */ 41 TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb; 42 43 /** 44 * Closure for @e cb. 45 */ 46 void *cb_cls; 47 48 /** 49 * Plugin context. 50 */ 51 struct TALER_AUDITORDB_PostgresContext *pg; 52 53 /** 54 * Number of results processed. 55 */ 56 enum GNUNET_DB_QueryStatus qs; 57 }; 58 59 60 /** 61 * Helper function for #TALER_AUDITORDB_iterate_historic_reserve_revenue(). 62 * To be called with the results of a SELECT statement 63 * that has returned @a num_results results. 64 * 65 * @param cls closure of type `struct HistoricRevenueContext *` 66 * @param result the postgres result 67 * @param num_results the number of results in @a result 68 */ 69 static void 70 historic_reserve_revenue_cb (void *cls, 71 PGresult *result, 72 unsigned int num_results) 73 { 74 struct HistoricReserveRevenueContext *hrc = cls; 75 struct TALER_AUDITORDB_PostgresContext *pg = hrc->pg; 76 77 for (unsigned int i = 0; i < num_results; i++) 78 { 79 uint64_t rowid; 80 struct GNUNET_TIME_Timestamp start_date; 81 struct GNUNET_TIME_Timestamp end_date; 82 struct TALER_Amount reserve_profits; 83 struct GNUNET_PQ_ResultSpec rs[] = { 84 GNUNET_PQ_result_spec_uint64 ("row_id", 85 &rowid), 86 GNUNET_PQ_result_spec_timestamp ("start_date", 87 &start_date), 88 GNUNET_PQ_result_spec_timestamp ("end_date", 89 &end_date), 90 TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_profits", 91 &reserve_profits), 92 GNUNET_PQ_result_spec_end 93 }; 94 95 if (GNUNET_OK != 96 GNUNET_PQ_extract_result (result, 97 rs, 98 i)) 99 { 100 GNUNET_break (0); 101 hrc->qs = GNUNET_DB_STATUS_HARD_ERROR; 102 return; 103 } 104 hrc->qs = i + 1; 105 if (GNUNET_OK != 106 hrc->cb (hrc->cb_cls, 107 rowid, 108 start_date, 109 end_date, 110 &reserve_profits)) 111 break; 112 } 113 } 114 115 116 enum GNUNET_DB_QueryStatus 117 TALER_AUDITORDB_iterate_historic_reserve_revenue ( 118 struct TALER_AUDITORDB_PostgresContext *pg, 119 int64_t limit, 120 uint64_t offset, 121 TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb, 122 void *cb_cls) 123 { 124 uint64_t ulimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 125 TALER_AUDITORDB_abs_limit (limit)); 126 struct GNUNET_PQ_QueryParam params[] = { 127 GNUNET_PQ_query_param_uint64 (&offset), 128 GNUNET_PQ_query_param_uint64 (&ulimit), 129 GNUNET_PQ_query_param_end 130 }; 131 enum GNUNET_DB_QueryStatus qs; 132 struct HistoricReserveRevenueContext hrc = { 133 .cb = cb, 134 .cb_cls = cb_cls, 135 .pg = pg 136 }; 137 138 PREPARE (pg, 139 "iterate_historic_reserve_revenue_summary_select_inc", 140 "SELECT" 141 " row_id" 142 ",start_date" 143 ",end_date" 144 ",reserve_profits" 145 " FROM auditor_historic_reserve_summary" 146 " WHERE row_id > $1" 147 " ORDER BY row_id ASC" 148 " LIMIT $2"); 149 PREPARE (pg, 150 "iterate_historic_reserve_revenue_summary_select_dec", 151 "SELECT" 152 " row_id" 153 ",start_date" 154 ",end_date" 155 ",reserve_profits" 156 " FROM auditor_historic_reserve_summary" 157 " WHERE row_id < $1" 158 " ORDER BY row_id DESC" 159 " LIMIT $2"); 160 qs = GNUNET_PQ_eval_prepared_multi_select ( 161 pg->conn, 162 limit > 0 163 ? "iterate_historic_reserve_revenue_summary_select_inc" 164 : "iterate_historic_reserve_revenue_summary_select_dec", 165 params, 166 &historic_reserve_revenue_cb, 167 &hrc); 168 if (0 >= qs) 169 return qs; 170 return hrc.qs; 171 }