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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchangedb/pg_count_known_coins.c
* @brief Implementation of the count_known_coins function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_count_known_coins.h"
#include "pg_helper.h"
long long
TEH_PG_count_known_coins (void *cls,
const struct
TALER_DenominationHashP *denom_pub_hash)
{
struct PostgresClosure *pg = cls;
uint64_t count;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (denom_pub_hash),
GNUNET_PQ_query_param_end
};
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("count",
&count),
GNUNET_PQ_result_spec_end
};
enum GNUNET_DB_QueryStatus qs;
PREPARE (pg,
"count_known_coins",
"SELECT"
" COUNT(*) AS count"
" FROM known_coins"
" WHERE denominations_serial="
" (SELECT denominations_serial"
" FROM denominations"
" WHERE denom_pub_hash=$1);");
qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"count_known_coins",
params,
rs);
if (0 > qs)
return (long long) qs;
return (long long) count;
}
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