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/*
This file is part of TALER
Copyright (C) 2023 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_select_aggregations_above_serial.c
* @brief Implementation of the select_aggregations_above_serial 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_select_aggregations_above_serial.h"
#include "pg_helper.h"
/**
* Closure for #aggregation_serial_helper_cb().
*/
struct AggregationSerialContext
{
/**
* Callback to call.
*/
TALER_EXCHANGEDB_AggregationCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Status code, set to #GNUNET_SYSERR on hard errors.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Helper function to be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls closure of type `struct AggregationSerialContext`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
aggregation_serial_helper_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct AggregationSerialContext *dsc = cls;
for (unsigned int i = 0; i<num_results; i++)
{
uint64_t tracking_rowid;
uint64_t batch_deposit_serial_id;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id",
&tracking_rowid),
GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
&batch_deposit_serial_id),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
dsc->status = GNUNET_SYSERR;
return;
}
dsc->cb (dsc->cb_cls,
tracking_rowid,
batch_deposit_serial_id);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_aggregations_above_serial (
void *cls,
uint64_t min_tracking_serial_id,
TALER_EXCHANGEDB_AggregationCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_uint64 (&min_tracking_serial_id),
GNUNET_PQ_query_param_end
};
struct AggregationSerialContext asc = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
/* Fetch aggregations with rowid '\geq' the given parameter */
PREPARE (pg,
"select_aggregations_above_serial",
"SELECT"
" aggregation_serial_id"
",batch_deposit_serial_id"
" FROM aggregation_tracking"
" WHERE aggregation_serial_id>=$1"
" ORDER BY aggregation_serial_id ASC;");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"select_aggregations_above_serial",
params,
&aggregation_serial_helper_cb,
&asc);
if (GNUNET_OK != asc.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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