pg_lock_product.c (4262B)
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 backenddb/pg_lock_product.c 18 * @brief Implementation of the lock_product function for Postgres 19 * @author Iván Ávalos 20 */ 21 #include "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_lock_product.h" 26 #include "pg_helper.h" 27 28 enum GNUNET_DB_QueryStatus 29 TMH_PG_lock_product (void *cls, 30 const char *instance_id, 31 const char *product_id, 32 const struct GNUNET_Uuid *uuid, 33 uint64_t quantity, 34 uint32_t quantity_frac, 35 struct GNUNET_TIME_Timestamp expiration_time) 36 { 37 struct PostgresClosure *pg = cls; 38 struct GNUNET_PQ_QueryParam params[] = { 39 GNUNET_PQ_query_param_string (instance_id), 40 GNUNET_PQ_query_param_string (product_id), 41 GNUNET_PQ_query_param_auto_from_type (uuid), 42 GNUNET_PQ_query_param_uint64 (&quantity), 43 GNUNET_PQ_query_param_uint32 (&quantity_frac), 44 GNUNET_PQ_query_param_timestamp (&expiration_time), 45 GNUNET_PQ_query_param_end 46 }; 47 48 check_connection (pg); 49 PREPARE (pg, 50 "lock_product", 51 "WITH ps AS" 52 " (SELECT product_serial" 53 " FROM merchant_inventory" 54 " WHERE product_id=$2" 55 " AND merchant_serial=" 56 " (SELECT merchant_serial" 57 " FROM merchant_instances" 58 " WHERE merchant_id=$1))" 59 ",tmp AS" 60 " (SELECT" 61 " mi.product_serial" 62 " ,mi.total_stock" 63 " ,mi.total_stock_frac" 64 " ,mi.total_sold" 65 " ,mi.total_sold_frac" 66 " ,mi.total_lost" 67 " ,mi.total_lost_frac" 68 " ,mi.allow_fractional_quantity" 69 " FROM merchant_inventory mi" 70 " JOIN ps USING (product_serial))" 71 "INSERT INTO merchant_inventory_locks" 72 "(product_serial" 73 ",lock_uuid" 74 ",total_locked" 75 ",total_locked_frac" 76 ",expiration)" 77 " SELECT tmp.product_serial, $3, $4::INT8, $5::INT4, $6" 78 " FROM tmp" 79 " WHERE (tmp.allow_fractional_quantity OR $5 = 0)" 80 " AND (tmp.total_stock = 9223372036854775807" 81 " OR (" 82 " (tmp.total_stock::NUMERIC * 1000000" 83 " + tmp.total_stock_frac::NUMERIC)" 84 " - (tmp.total_sold::NUMERIC * 1000000" 85 " + tmp.total_sold_frac::NUMERIC)" 86 " - (tmp.total_lost::NUMERIC * 1000000" 87 " + tmp.total_lost_frac::NUMERIC)" 88 " >= " 89 " (($4::NUMERIC * 1000000) + $5::NUMERIC)" 90 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 91 " + total_locked_frac::NUMERIC), 0)" 92 " FROM merchant_inventory_locks mil" 93 " WHERE mil.product_serial = tmp.product_serial)" 94 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 95 " + total_locked_frac::NUMERIC), 0)" 96 " FROM merchant_order_locks mol" 97 " WHERE mol.product_serial = tmp.product_serial)" 98 " ))"); 99 return GNUNET_PQ_eval_prepared_non_select (pg->conn, 100 "lock_product", 101 params); 102 }