1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
This file is part of GNUnet
Copyright (C) 2017, 2019 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero 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.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file pq/pq_prepare.c
* @brief functions to connect to libpq (PostGres)
* @author Christian Grothoff
*/
#include "platform.h"
#include "pq.h"
struct GNUNET_PQ_PreparedStatement
GNUNET_PQ_make_prepare (const char *name,
const char *sql)
{
struct GNUNET_PQ_PreparedStatement ps = {
.name = name,
.sql = sql
};
return ps;
}
enum GNUNET_GenericReturnValue
GNUNET_PQ_prepare_once (struct GNUNET_PQ_Context *db,
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 (db->conn,
ps[i].name,
ps[i].sql,
0,
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 (db->conn));
PQclear (ret);
ret = PQdescribePrepared (db->conn,
ps[i].name);
if (PGRES_COMMAND_OK != PQresultStatus (ret))
{
PQclear (ret);
return GNUNET_SYSERR;
}
GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
"pq",
"Statement `%s' already known. Ignoring the issue in the hope that you are using connection pooling...\n",
ps[i].name);
}
PQclear (ret);
}
return GNUNET_OK;
}
enum GNUNET_GenericReturnValue
GNUNET_PQ_prepare_statements (struct GNUNET_PQ_Context *db,
const struct GNUNET_PQ_PreparedStatement *ps)
{
if (db->ps != ps)
{
/* add 'ps' to list db->ps of prepared statements to run on reconnect! */
unsigned int nlen = 0; /* length of 'ps' array */
unsigned int xlen;
struct GNUNET_PQ_PreparedStatement *rps; /* combined array */
while (NULL != ps[nlen].name)
nlen++;
xlen = nlen + db->ps_off;
if (xlen > db->ps_len)
{
xlen = 2 * xlen + 1;
rps = GNUNET_new_array (xlen,
struct GNUNET_PQ_PreparedStatement);
if (NULL != db->ps)
memcpy (rps,
db->ps,
db->ps_off * sizeof (struct GNUNET_PQ_PreparedStatement));
GNUNET_free (db->ps);
db->ps_len = xlen;
db->ps = rps;
}
memcpy (&db->ps[db->ps_off],
ps,
nlen * sizeof (struct GNUNET_PQ_PreparedStatement));
db->ps_off += nlen;
}
return GNUNET_PQ_prepare_once (db,
ps);
}
/* end of pq/pq_prepare.c */
|
