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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_count_known_coins.c 18 : * @brief Implementation of the count_known_coins function for Postgres 19 : * @author Christian Grothoff 20 : */ 21 : #include "platform.h" 22 : #include "taler_error_codes.h" 23 : #include "taler_dbevents.h" 24 : #include "taler_pq_lib.h" 25 : #include "pg_count_known_coins.h" 26 : #include "pg_helper.h" 27 : 28 : long long 29 238 : TEH_PG_count_known_coins (void *cls, 30 : const struct 31 : TALER_DenominationHashP *denom_pub_hash) 32 : { 33 238 : struct PostgresClosure *pg = cls; 34 : uint64_t count; 35 238 : struct GNUNET_PQ_QueryParam params[] = { 36 238 : GNUNET_PQ_query_param_auto_from_type (denom_pub_hash), 37 : GNUNET_PQ_query_param_end 38 : }; 39 238 : struct GNUNET_PQ_ResultSpec rs[] = { 40 238 : GNUNET_PQ_result_spec_uint64 ("count", 41 : &count), 42 : GNUNET_PQ_result_spec_end 43 : }; 44 : enum GNUNET_DB_QueryStatus qs; 45 : 46 : 47 238 : PREPARE (pg, 48 : "count_known_coins", 49 : "SELECT" 50 : " COUNT(*) AS count" 51 : " FROM known_coins" 52 : " WHERE denominations_serial=" 53 : " (SELECT denominations_serial" 54 : " FROM denominations" 55 : " WHERE denom_pub_hash=$1);"); 56 238 : qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 57 : "count_known_coins", 58 : params, 59 : rs); 60 238 : if (0 > qs) 61 0 : return (long long) qs; 62 238 : return (long long) count; 63 : }