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/*
This file is part of GNUnet
Copyright (C) 2017 GNUnet e.V.
GNUnet 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 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
*/
/**
* @file pq/pq_prepare.c
* @brief functions to connect to libpq (PostGres)
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_pq_lib.h"
/**
* Create a `struct GNUNET_PQ_PreparedStatement`.
*
* @param name name of the statement
* @param sql actual SQL statement
* @param num_args number of arguments in the statement
* @return initialized struct
*/
struct GNUNET_PQ_PreparedStatement
GNUNET_PQ_make_prepare (const char *name,
const char *sql,
unsigned int num_args)
{
struct GNUNET_PQ_PreparedStatement ps = {
.name = name,
.sql = sql,
.num_arguments = num_args
};
return ps;
}
/**
* Request creation of prepared statements @a ps from Postgres.
*
* @param connection connection to prepare the statements for
* @param ps #GNUNET_PQ_PREPARED_STATEMENT_END-terminated array of prepared
* statements.
* @return #GNUNET_OK on success,
* #GNUNET_SYSERR on error
*/
int
GNUNET_PQ_prepare_statements (PGconn *connection,
const struct GNUNET_PQ_PreparedStatement *ps)
{
for (unsigned int i=0;NULL != ps[i].name;i++)
{
PGresult *ret;
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"pq",
"Preparing SQL statement `%s' as `%s'\n",
ps[i].sql,
ps[i].name);
ret = PQprepare (connection,
ps[i].name,
ps[i].sql,
ps[i].num_arguments,
NULL);
if (PGRES_COMMAND_OK != PQresultStatus (ret))
{
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"pq",
_("PQprepare (`%s' as `%s') failed with error: %s\n"),
ps[i].sql,
ps[i].name,
PQerrorMessage (connection));
PQclear (ret);
return GNUNET_SYSERR;
}
PQclear (ret);
}
return GNUNET_OK;
}
/* end of pq/pq_prepare.c */
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