exchange

Base system with REST service to issue digital coins, run by the payment service provider
Log | Files | Refs | Submodules | README | LICENSE

delete_generic.c (2705B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2024 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 #include "taler/taler_pq_lib.h"
     17 #include "pg_helper.h"
     18 #include "auditor-database/delete_generic.h"
     19 
     20 struct Preparations
     21 {
     22   /**
     23    * Database reconnect counter.
     24    */
     25   unsigned long long cnt;
     26 
     27   /**
     28    * Which DB did we do prepare for.
     29    */
     30   struct TALER_AUDITORDB_PostgresContext *pg;
     31 
     32 };
     33 
     34 enum GNUNET_DB_QueryStatus
     35 TALER_AUDITORDB_delete_generic (struct TALER_AUDITORDB_PostgresContext *pg,
     36                                 enum TALER_AUDITORDB_DeletableSuppressableTables
     37                                 table
     38                                 ,
     39                                 uint64_t row_id)
     40 {
     41   struct GNUNET_PQ_QueryParam params[] = {
     42     GNUNET_PQ_query_param_uint64 (&row_id),
     43     GNUNET_PQ_query_param_end
     44   };
     45   static struct Preparations preps[
     46     TALER_AUDITORDB_DELETABLESUPPRESSABLE_TABLES_MAX];
     47 
     48   struct Preparations *prep = &preps[table];
     49   const char *table_name = TALER_AUDITORDB_get_deletable_suppressable_table_name
     50                            (
     51     table);
     52   char statement_name[256];
     53 
     54   GNUNET_snprintf (statement_name,
     55                    sizeof (statement_name),
     56                    "delete_%s",
     57                    table_name);
     58   if ( (pg != prep->pg) ||
     59        (prep->cnt < pg->prep_gen) )
     60   {
     61     char sql[256];
     62     struct GNUNET_PQ_PreparedStatement ps[] = {
     63       GNUNET_PQ_make_prepare (statement_name,
     64                               sql),
     65       GNUNET_PQ_PREPARED_STATEMENT_END
     66     };
     67 
     68     GNUNET_snprintf (sql,
     69                      sizeof (sql),
     70                      "DELETE FROM %s"
     71                      " WHERE row_id=$1",
     72                      table_name);
     73     if (GNUNET_OK !=
     74         GNUNET_PQ_prepare_statements (pg->conn,
     75                                       ps))
     76     {
     77       GNUNET_break (0);
     78       return GNUNET_DB_STATUS_HARD_ERROR;
     79     }
     80     prep->pg = pg;
     81     prep->cnt = pg->prep_gen;
     82   }
     83   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
     84                                              statement_name,
     85                                              params);
     86 }