Line data    Source code

       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 exchangedb/pg_start_read_only.c
      18             :  * @brief Implementation of the start_read_only function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "platform.h"
      22             : #include "taler_error_codes.h"
      23             : #include "taler_dbevents.h"
      24             : #include "taler_pq_lib.h"
      25             : #include "pg_start_read_only.h"
      26             : #include "pg_preflight.h"
      27             : #include "pg_helper.h"
      28             : 
      29             : enum GNUNET_GenericReturnValue
      30         204 : TEH_PG_start_read_only (void *cls,
      31             :                         const char *name)
      32             : {
      33         204 :   struct PostgresClosure *pg = cls;
      34         204 :   struct GNUNET_PQ_ExecuteStatement es[] = {
      35         204 :     GNUNET_PQ_make_execute (
      36             :       "START TRANSACTION ISOLATION LEVEL SERIALIZABLE READ ONLY"),
      37             :     GNUNET_PQ_EXECUTE_STATEMENT_END
      38             :   };
      39             : 
      40         204 :   GNUNET_assert (NULL != name);
      41         204 :   if (GNUNET_SYSERR ==
      42         204 :       TEH_PG_preflight (pg))
      43           0 :     return GNUNET_SYSERR;
      44         204 :   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
      45             :               "Starting READ ONLY transaction `%s`\n",
      46             :               name);
      47         204 :   if (GNUNET_OK !=
      48         204 :       GNUNET_PQ_exec_statements (pg->conn,
      49             :                                  es))
      50             :   {
      51           0 :     TALER_LOG_ERROR ("Failed to start transaction\n");
      52           0 :     GNUNET_break (0);
      53           0 :     return GNUNET_SYSERR;
      54             :   }
      55         204 :   pg->transaction_name = name;
      56         204 :   return GNUNET_OK;
      57             : }