diff options
Diffstat (limited to 'src/exchangedb/pg_select_aggregations_above_serial.c')
-rw-r--r-- | src/exchangedb/pg_select_aggregations_above_serial.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_aggregations_above_serial.c b/src/exchangedb/pg_select_aggregations_above_serial.c new file mode 100644 index 000000000..52d202702 --- /dev/null +++ b/src/exchangedb/pg_select_aggregations_above_serial.c @@ -0,0 +1,137 @@ +/* + 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; +} |