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Diffstat (limited to 'src/exchangedb/pg_count_known_coins.c')
-rw-r--r-- | src/exchangedb/pg_count_known_coins.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/exchangedb/pg_count_known_coins.c b/src/exchangedb/pg_count_known_coins.c new file mode 100644 index 000000000..28c4612fc --- /dev/null +++ b/src/exchangedb/pg_count_known_coins.c @@ -0,0 +1,63 @@ +/* + 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; +} |