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/get_count_known_coins.c
      18              :  * @brief Implementation of the get_count_known_coins function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/get_count_known_coins.h"
      23              : #include "helper.h"
      24              : 
      25              : long long
      26            5 : TALER_EXCHANGEDB_get_count_known_coins (struct
      27              :                                         TALER_EXCHANGEDB_PostgresContext *pg,
      28              :                                         const struct
      29              :                                         TALER_DenominationHashP *denom_pub_hash)
      30              : {
      31              :   uint64_t count;
      32            5 :   struct GNUNET_PQ_QueryParam params[] = {
      33            5 :     GNUNET_PQ_query_param_auto_from_type (denom_pub_hash),
      34              :     GNUNET_PQ_query_param_end
      35              :   };
      36            5 :   struct GNUNET_PQ_ResultSpec rs[] = {
      37            5 :     GNUNET_PQ_result_spec_uint64 ("count",
      38              :                                   &count),
      39              :     GNUNET_PQ_result_spec_end
      40              :   };
      41              :   enum GNUNET_DB_QueryStatus qs;
      42              : 
      43              : 
      44            5 :   PREPARE (pg,
      45              :            "get_count_known_coins",
      46              :            "SELECT"
      47              :            " COUNT(*) AS count"
      48              :            " FROM known_coins"
      49              :            " WHERE denominations_serial="
      50              :            "  (SELECT denominations_serial"
      51              :            "    FROM denominations"
      52              :            "    WHERE denom_pub_hash=$1);");
      53            5 :   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      54              :                                                  "get_count_known_coins",
      55              :                                                  params,
      56              :                                                  rs);
      57            5 :   if (0 > qs)
      58            0 :     return (long long) qs;
      59            5 :   return (long long) count;
      60              : }