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Diffstat (limited to 'src/backenddb/pg_insert_order_lock.c')
-rw-r--r-- | src/backenddb/pg_insert_order_lock.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/backenddb/pg_insert_order_lock.c b/src/backenddb/pg_insert_order_lock.c new file mode 100644 index 00000000..862a6320 --- /dev/null +++ b/src/backenddb/pg_insert_order_lock.c @@ -0,0 +1,78 @@ +/* + 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 backenddb/pg_insert_order_lock.c + * @brief Implementation of the insert_order_lock function for Postgres + * @author Iván Ávalos + */ +#include "platform.h" +#include <taler/taler_error_codes.h> +#include <taler/taler_dbevents.h> +#include <taler/taler_pq_lib.h> +#include "pg_insert_order_lock.h" +#include "pg_helper.h" + +enum GNUNET_DB_QueryStatus +TMH_PG_insert_order_lock (void *cls, + const char *instance_id, + const char *order_id, + const char *product_id, + uint64_t quantity) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_string (instance_id), + GNUNET_PQ_query_param_string (order_id), + GNUNET_PQ_query_param_string (product_id), + GNUNET_PQ_query_param_uint64 (&quantity), + GNUNET_PQ_query_param_end + }; + + check_connection (pg); + PREPARE (pg, + "insert_order_lock", + "WITH tmp AS" + " (SELECT " + " product_serial" + " ,merchant_serial" + " ,total_stock" + " ,total_sold" + " ,total_lost" + " FROM merchant_inventory" + " WHERE product_id=$3" + " AND merchant_serial=" + " (SELECT merchant_serial" + " FROM merchant_instances" + " WHERE merchant_id=$1))" + " INSERT INTO merchant_order_locks" + " (product_serial" + " ,total_locked" + " ,order_serial)" + " SELECT tmp.product_serial, $4, order_serial" + " FROM merchant_orders" + " JOIN tmp USING(merchant_serial)" + " WHERE order_id=$2 AND" + " tmp.total_stock - tmp.total_sold - tmp.total_lost - $4 >= " + " (SELECT COALESCE(SUM(total_locked), 0)" + " FROM merchant_inventory_locks" + " WHERE product_serial=tmp.product_serial) + " + " (SELECT COALESCE(SUM(total_locked), 0)" + " FROM merchant_order_locks" + " WHERE product_serial=tmp.product_serial)"); + return GNUNET_PQ_eval_prepared_non_select (pg->conn, + "insert_order_lock", + params); +} |