Line data    Source code

       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 "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_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             : }