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drv_mysql.c
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drv_mysql.c
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/* Copyright (C) 2004 MySQL AB
Copyright (C) 2004-2018 Alexey Kopytov <akopytov@gmail.com>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef STDC_HEADERS
# include <stdio.h>
#endif
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdio.h>
#include <mysql.h>
#include <mysqld_error.h>
#include <errmsg.h>
#include "sb_options.h"
#include "db_driver.h"
#define DEBUG(format, ...) \
do { \
if (SB_UNLIKELY(args.debug != 0)) \
log_text(LOG_DEBUG, format, __VA_ARGS__); \
} while (0)
static inline const char *SAFESTR(const char *s)
{
return s ? s : "(null)";
}
#if !defined(MARIADB_BASE_VERSION) && !defined(MARIADB_VERSION_ID) && \
MYSQL_VERSION_ID >= 80001 && MYSQL_VERSION_ID != 80002 /* see https://bugs.mysql.com/?id=87337 */
typedef bool my_bool;
#endif
/* MySQL driver arguments */
static sb_arg_t mysql_drv_args[] =
{
SB_OPT("mysql-host", "MySQL server host", "localhost", LIST),
SB_OPT("mysql-port", "MySQL server port", "3306", LIST),
SB_OPT("mysql-socket", "MySQL socket", NULL, LIST),
SB_OPT("mysql-user", "MySQL user", "sbtest", STRING),
SB_OPT("mysql-password", "MySQL password", "", STRING),
SB_OPT("mysql-db", "MySQL database name", "sbtest", STRING),
#ifdef HAVE_MYSQL_OPT_SSL_MODE
SB_OPT("mysql-ssl", "SSL mode. This accepts the same values as the "
"--ssl-mode option in the MySQL client utilities. Disabled by default",
"disabled", STRING),
#else
SB_OPT("mysql-ssl", "use SSL connections, if available in the client "
"library", "off", BOOL),
#endif
SB_OPT("mysql-ssl-key", "path name of the client private key file", NULL,
STRING),
SB_OPT("mysql-ssl-ca", "path name of the CA file", NULL, STRING),
SB_OPT("mysql-ssl-cert",
"path name of the client public key certificate file", NULL, STRING),
SB_OPT("mysql-ssl-cipher", "use specific cipher for SSL connections", "",
STRING),
SB_OPT("mysql-compression", "use compression, if available in the "
"client library", "off", BOOL),
SB_OPT("mysql-compression-algorithms", "compression algorithms to use",
"zlib", STRING),
SB_OPT("mysql-debug", "trace all client library calls", "off", BOOL),
SB_OPT("mysql-ignore-errors", "list of errors to ignore, or \"all\"",
"1213,1020,1205", LIST),
SB_OPT("mysql-dry-run", "Dry run, pretend that all MySQL client API "
"calls are successful without executing them", "off", BOOL),
SB_OPT_END
};
typedef struct
{
sb_list_t *hosts;
sb_list_t *ports;
sb_list_t *sockets;
const char *user;
const char *password;
const char *db;
#ifdef HAVE_MYSQL_OPT_SSL_MODE
unsigned int ssl_mode;
#endif
bool use_ssl;
const char *ssl_key;
const char *ssl_cert;
const char *ssl_ca;
const char *ssl_cipher;
unsigned char use_compression;
const char *compression_alg;
unsigned char debug;
sb_list_t *ignored_errors;
unsigned int dry_run;
} mysql_drv_args_t;
typedef struct
{
MYSQL *mysql;
const char *host;
const char *user;
const char *password;
const char *db;
unsigned int port;
char *socket;
} db_mysql_conn_t;
#ifdef HAVE_MYSQL_OPT_SSL_MODE
typedef struct {
const char *name;
enum mysql_ssl_mode mode;
} ssl_mode_map_t;
#endif
/* Structure used for DB-to-MySQL bind types map */
typedef struct
{
db_bind_type_t db_type;
int my_type;
} db_mysql_bind_map_t;
/* DB-to-MySQL bind types map */
db_mysql_bind_map_t db_mysql_bind_map[] =
{
{DB_TYPE_TINYINT, MYSQL_TYPE_TINY},
{DB_TYPE_SMALLINT, MYSQL_TYPE_SHORT},
{DB_TYPE_INT, MYSQL_TYPE_LONG},
{DB_TYPE_BIGINT, MYSQL_TYPE_LONGLONG},
{DB_TYPE_FLOAT, MYSQL_TYPE_FLOAT},
{DB_TYPE_DOUBLE, MYSQL_TYPE_DOUBLE},
{DB_TYPE_DATETIME, MYSQL_TYPE_DATETIME},
{DB_TYPE_TIMESTAMP, MYSQL_TYPE_TIMESTAMP},
{DB_TYPE_CHAR, MYSQL_TYPE_STRING},
{DB_TYPE_VARCHAR, MYSQL_TYPE_VAR_STRING},
{DB_TYPE_NONE, 0}
};
/* MySQL driver capabilities */
static drv_caps_t mysql_drv_caps =
{
1,
0,
1,
0,
0,
1
};
static mysql_drv_args_t args; /* driver args */
static char use_ps; /* whether server-side prepared statemens should be used */
/* Positions in the list of hosts/ports/sockets. Protected by pos_mutex */
static sb_list_item_t *hosts_pos;
static sb_list_item_t *ports_pos;
static sb_list_item_t *sockets_pos;
static pthread_mutex_t pos_mutex;
#ifdef HAVE_MYSQL_OPT_SSL_MODE
#if MYSQL_VERSION_ID < 50711
/*
In MySQL 5.6 the only valid SSL mode is SSL_MODE_REQUIRED. Define
SSL_MODE_DISABLED to enable the 'disabled' default value for --mysql-ssl
*/
#define SSL_MODE_DISABLED 1
#endif
static ssl_mode_map_t ssl_mode_names[] = {
{"DISABLED", SSL_MODE_DISABLED},
#if MYSQL_VERSION_ID >= 50711
{"PREFERRED", SSL_MODE_PREFERRED},
#endif
{"REQUIRED", SSL_MODE_REQUIRED},
#if MYSQL_VERSION_ID >= 50711
{"VERIFY_CA", SSL_MODE_VERIFY_CA},
{"VERIFY_IDENTITY", SSL_MODE_VERIFY_IDENTITY},
#endif
{NULL, 0}
};
#endif
/* MySQL driver operations */
static int mysql_drv_init(void);
static int mysql_drv_thread_init(int);
static int mysql_drv_describe(drv_caps_t *);
static int mysql_drv_connect(db_conn_t *);
static int mysql_drv_reconnect(db_conn_t *);
static int mysql_drv_disconnect(db_conn_t *);
static int mysql_drv_prepare(db_stmt_t *, const char *, size_t);
static int mysql_drv_bind_param(db_stmt_t *, db_bind_t *, size_t);
static int mysql_drv_bind_result(db_stmt_t *, db_bind_t *, size_t);
static db_error_t mysql_drv_execute(db_stmt_t *, db_result_t *);
static db_error_t mysql_drv_stmt_next_result(db_stmt_t *, db_result_t *);
static int mysql_drv_fetch(db_result_t *);
static int mysql_drv_fetch_row(db_result_t *, db_row_t *);
static db_error_t mysql_drv_query(db_conn_t *, const char *, size_t,
db_result_t *);
static bool mysql_drv_more_results(db_conn_t *);
static db_error_t mysql_drv_next_result(db_conn_t *, db_result_t *);
static int mysql_drv_free_results(db_result_t *);
static int mysql_drv_close(db_stmt_t *);
static int mysql_drv_thread_done(int);
static int mysql_drv_done(void);
/* MySQL driver definition */
static db_driver_t mysql_driver =
{
.sname = "mysql",
.lname = "MySQL driver",
.args = mysql_drv_args,
.ops = {
.init = mysql_drv_init,
.thread_init = mysql_drv_thread_init,
.describe = mysql_drv_describe,
.connect = mysql_drv_connect,
.disconnect = mysql_drv_disconnect,
.reconnect = mysql_drv_reconnect,
.prepare = mysql_drv_prepare,
.bind_param = mysql_drv_bind_param,
.bind_result = mysql_drv_bind_result,
.execute = mysql_drv_execute,
.stmt_next_result = mysql_drv_stmt_next_result,
.fetch = mysql_drv_fetch,
.fetch_row = mysql_drv_fetch_row,
.more_results = mysql_drv_more_results,
.next_result = mysql_drv_next_result,
.free_results = mysql_drv_free_results,
.close = mysql_drv_close,
.query = mysql_drv_query,
.thread_done = mysql_drv_thread_done,
.done = mysql_drv_done
}
};
/* Local functions */
static int get_mysql_bind_type(db_bind_type_t);
/* Register MySQL driver */
int register_driver_mysql(sb_list_t *drivers)
{
SB_LIST_ADD_TAIL(&mysql_driver.listitem, drivers);
return 0;
}
/* MySQL driver initialization */
int mysql_drv_init(void)
{
pthread_mutex_init(&pos_mutex, NULL);
args.hosts = sb_get_value_list("mysql-host");
if (SB_LIST_IS_EMPTY(args.hosts))
{
log_text(LOG_FATAL, "No MySQL hosts specified, aborting");
return 1;
}
hosts_pos = SB_LIST_ITEM_NEXT(args.hosts);
args.ports = sb_get_value_list("mysql-port");
if (SB_LIST_IS_EMPTY(args.ports))
{
log_text(LOG_FATAL, "No MySQL ports specified, aborting");
return 1;
}
ports_pos = SB_LIST_ITEM_NEXT(args.ports);
args.sockets = sb_get_value_list("mysql-socket");
sockets_pos = args.sockets;
args.user = sb_get_value_string("mysql-user");
args.password = sb_get_value_string("mysql-password");
args.db = sb_get_value_string("mysql-db");
args.ssl_cipher = sb_get_value_string("mysql-ssl-cipher");
args.ssl_key = sb_get_value_string("mysql-ssl-key");
args.ssl_cert = sb_get_value_string("mysql-ssl-cert");
args.ssl_ca = sb_get_value_string("mysql-ssl-ca");
#ifdef HAVE_MYSQL_OPT_SSL_MODE
const char * const ssl_mode_string = sb_get_value_string("mysql-ssl");
args.ssl_mode = 0;
for (int i = 0; ssl_mode_names[i].name != NULL; i++) {
if (!strcasecmp(ssl_mode_string, ssl_mode_names[i].name)) {
args.ssl_mode = ssl_mode_names[i].mode;
break;
}
}
if (args.ssl_mode == 0)
{
log_text(LOG_FATAL, "Invalid value for --mysql-ssl: '%s'", ssl_mode_string);
return 1;
}
args.use_ssl = (args.ssl_mode != SSL_MODE_DISABLED);
#else
args.use_ssl = sb_get_value_flag("mysql-ssl");
#endif
args.use_compression = sb_get_value_flag("mysql-compression");
args.compression_alg = sb_get_value_string("mysql-compression-algorithms");
args.debug = sb_get_value_flag("mysql-debug");
if (args.debug)
sb_globals.verbosity = LOG_DEBUG;
args.ignored_errors = sb_get_value_list("mysql-ignore-errors");
args.dry_run = sb_get_value_flag("mysql-dry-run");
use_ps = 0;
mysql_drv_caps.prepared_statements = 1;
if (db_globals.ps_mode != DB_PS_MODE_DISABLE)
use_ps = 1;
DEBUG("mysql_library_init(%d, %p, %p)", 0, NULL, NULL);
mysql_library_init(0, NULL, NULL);
return 0;
}
/* Thread-local driver initialization */
int mysql_drv_thread_init(int thread_id)
{
(void) thread_id; /* unused */
const my_bool rc = mysql_thread_init();
DEBUG("mysql_thread_init() = %d", (int) rc);
return rc != 0;
}
/* Thread-local driver deinitialization */
int mysql_drv_thread_done(int thread_id)
{
(void) thread_id; /* unused */
DEBUG("mysql_thread_end(%s)", "");
mysql_thread_end();
return 0;
}
/* Describe database capabilities */
int mysql_drv_describe(drv_caps_t *caps)
{
*caps = mysql_drv_caps;
return 0;
}
static int mysql_drv_real_connect(db_mysql_conn_t *db_mysql_con)
{
MYSQL *con = db_mysql_con->mysql;
#ifdef HAVE_MYSQL_OPT_SSL_MODE
DEBUG("mysql_options(%p,%s,%d)", con, "MYSQL_OPT_SSL_MODE", args.ssl_mode);
mysql_options(con, MYSQL_OPT_SSL_MODE, &args.ssl_mode);
#endif
if (args.use_ssl)
{
DEBUG("mysql_ssl_set(%p, \"%s\", \"%s\", \"%s\", NULL, \"%s\")", con,
SAFESTR(args.ssl_key), SAFESTR(args.ssl_cert), SAFESTR(args.ssl_ca),
SAFESTR(args.ssl_cipher));
mysql_ssl_set(con, args.ssl_key, args.ssl_cert, args.ssl_ca, NULL,
args.ssl_cipher);
}
if (args.use_compression)
{
DEBUG("mysql_options(%p, %s, %s)",con, "MYSQL_OPT_COMPRESS", "NULL");
mysql_options(con, MYSQL_OPT_COMPRESS, NULL);
DEBUG("mysql_options(%p, %s, %s)",con, "MYSQL_OPT_COMPRESSION_ALGORITHMS", args.compression_alg);
mysql_options(con, MYSQL_OPT_COMPRESSION_ALGORITHMS, args.compression_alg);
}
DEBUG("mysql_real_connect(%p, \"%s\", \"%s\", \"%s\", \"%s\", %u, \"%s\", %s)",
con,
SAFESTR(db_mysql_con->host),
SAFESTR(db_mysql_con->user),
SAFESTR(db_mysql_con->password),
SAFESTR(db_mysql_con->db),
db_mysql_con->port,
SAFESTR(db_mysql_con->socket),
(MYSQL_VERSION_ID >= 50000) ? "CLIENT_MULTI_STATEMENTS" : "0"
);
return mysql_real_connect(con,
db_mysql_con->host,
db_mysql_con->user,
db_mysql_con->password,
db_mysql_con->db,
db_mysql_con->port,
db_mysql_con->socket,
#if MYSQL_VERSION_ID >= 50000
CLIENT_MULTI_STATEMENTS
#else
0
#endif
) == NULL;
}
/* Connect to MySQL database */
int mysql_drv_connect(db_conn_t *sb_conn)
{
MYSQL *con;
db_mysql_conn_t *db_mysql_con;
if (args.dry_run)
return 0;
db_mysql_con = (db_mysql_conn_t *) calloc(1, sizeof(db_mysql_conn_t));
if (db_mysql_con == NULL)
return 1;
con = (MYSQL *) malloc(sizeof(MYSQL));
if (con == NULL)
return 1;
db_mysql_con->mysql = con;
DEBUG("mysql_init(%p)", con);
mysql_init(con);
pthread_mutex_lock(&pos_mutex);
if (SB_LIST_IS_EMPTY(args.sockets))
{
db_mysql_con->socket = NULL;
db_mysql_con->host = SB_LIST_ENTRY(hosts_pos, value_t, listitem)->data;
db_mysql_con->port =
atoi(SB_LIST_ENTRY(ports_pos, value_t, listitem)->data);
/*
Pick the next port in args.ports. If there are no more ports in the list,
move to the next available host and get the first port again.
*/
ports_pos = SB_LIST_ITEM_NEXT(ports_pos);
if (ports_pos == args.ports) {
hosts_pos = SB_LIST_ITEM_NEXT(hosts_pos);
if (hosts_pos == args.hosts)
hosts_pos = SB_LIST_ITEM_NEXT(hosts_pos);
ports_pos = SB_LIST_ITEM_NEXT(ports_pos);
}
}
else
{
db_mysql_con->host = "localhost";
/*
The sockets list may be empty. So unlike hosts/ports the loop invariant
here is that sockets_pos points to the previous one and should be
advanced before using it, not after.
*/
sockets_pos = SB_LIST_ITEM_NEXT(sockets_pos);
if (sockets_pos == args.sockets)
sockets_pos = SB_LIST_ITEM_NEXT(sockets_pos);
db_mysql_con->socket = SB_LIST_ENTRY(sockets_pos, value_t, listitem)->data;
}
pthread_mutex_unlock(&pos_mutex);
db_mysql_con->user = args.user;
db_mysql_con->password = args.password;
db_mysql_con->db = args.db;
if (mysql_drv_real_connect(db_mysql_con))
{
if (!SB_LIST_IS_EMPTY(args.sockets))
log_text(LOG_FATAL, "unable to connect to MySQL server on socket '%s', "
"aborting...", db_mysql_con->socket);
else
log_text(LOG_FATAL, "unable to connect to MySQL server on host '%s', "
"port %u, aborting...",
db_mysql_con->host, db_mysql_con->port);
log_text(LOG_FATAL, "error %d: %s", mysql_errno(con),
mysql_error(con));
free(db_mysql_con);
free(con);
return 1;
}
if (args.use_ssl)
{
DEBUG("mysql_get_ssl_cipher(con): \"%s\"",
SAFESTR(mysql_get_ssl_cipher(con)));
}
sb_conn->ptr = db_mysql_con;
return 0;
}
/* Disconnect from MySQL database */
int mysql_drv_disconnect(db_conn_t *sb_conn)
{
db_mysql_conn_t *db_mysql_con = sb_conn->ptr;
if (args.dry_run)
return 0;
if (db_mysql_con != NULL && db_mysql_con->mysql != NULL)
{
DEBUG("mysql_close(%p)", db_mysql_con->mysql);
mysql_close(db_mysql_con->mysql);
free(db_mysql_con->mysql);
free(db_mysql_con);
}
return 0;
}
/* Prepare statement */
int mysql_drv_prepare(db_stmt_t *stmt, const char *query, size_t len)
{
MYSQL_STMT *mystmt;
unsigned int rc;
if (args.dry_run)
return 0;
db_mysql_conn_t *db_mysql_con = (db_mysql_conn_t *) stmt->connection->ptr;
MYSQL *con = db_mysql_con->mysql;
if (con == NULL)
return 1;
if (use_ps)
{
mystmt = mysql_stmt_init(con);
DEBUG("mysql_stmt_init(%p) = %p", con, mystmt);
if (mystmt == NULL)
{
log_text(LOG_FATAL, "mysql_stmt_init() failed");
return 1;
}
stmt->ptr = (void *)mystmt;
DEBUG("mysql_stmt_prepare(%p, \"%s\", %u) = %p", mystmt, query,
(unsigned int) len, stmt->ptr);
if (mysql_stmt_prepare(mystmt, query, len))
{
/* Check if this statement in not supported */
rc = mysql_errno(con);
DEBUG("mysql_errno(%p) = %u", con, rc);
if (rc == ER_UNSUPPORTED_PS)
{
log_text(LOG_INFO,
"Failed to prepare query \"%s\" (%d: %s), using emulation",
query, rc, mysql_error(con));
goto emulate;
}
else
{
log_text(LOG_FATAL, "mysql_stmt_prepare() failed");
log_text(LOG_FATAL, "MySQL error: %d \"%s\"", rc,
mysql_error(con));
DEBUG("mysql_stmt_close(%p)", mystmt);
mysql_stmt_close(mystmt);
return 1;
}
}
stmt->query = strdup(query);
return 0;
}
emulate:
/* Use client-side PS */
stmt->emulated = 1;
stmt->query = strdup(query);
return 0;
}
static void convert_to_mysql_bind(MYSQL_BIND *mybind, db_bind_t *bind)
{
mybind->buffer_type = get_mysql_bind_type(bind->type);
mybind->buffer = bind->buffer;
mybind->buffer_length = bind->max_len;
mybind->length = bind->data_len;
/*
Reuse the buffer passed by the caller to avoid conversions. This is only
valid if sizeof(char) == sizeof(mybind->is_null[0]). Depending on the
version of the MySQL client library, the type of MYSQL_BIND::is_null[0] can
be either my_bool or bool, but sizeof(bool) is not defined by the C
standard. We assume it to be 1 on most platforms to simplify code and Lua
API.
*/
#if SIZEOF_BOOL > 1
# error This code assumes sizeof(bool) == 1!
#endif
mybind->is_null = (my_bool *) bind->is_null;
}
/* Bind parameters for prepared statement */
int mysql_drv_bind_param(db_stmt_t *stmt, db_bind_t *params, size_t len)
{
MYSQL_BIND *bind;
unsigned int i;
my_bool rc;
unsigned long param_count;
if (args.dry_run)
return 0;
db_mysql_conn_t *db_mysql_con = (db_mysql_conn_t *) stmt->connection->ptr;
MYSQL *con = db_mysql_con->mysql;
if (con == NULL)
return 1;
if (!stmt->emulated)
{
if (stmt->ptr == NULL)
return 1;
/* Validate parameters count */
param_count = mysql_stmt_param_count(stmt->ptr);
DEBUG("mysql_stmt_param_count(%p) = %lu", stmt->ptr, param_count);
if (param_count != len)
{
log_text(LOG_FATAL, "Wrong number of parameters to mysql_stmt_bind_param");
return 1;
}
/* Convert sysbench bind structures to MySQL ones */
bind = (MYSQL_BIND *)calloc(len, sizeof(MYSQL_BIND));
if (bind == NULL)
return 1;
for (i = 0; i < len; i++)
convert_to_mysql_bind(&bind[i], ¶ms[i]);
rc = mysql_stmt_bind_param(stmt->ptr, bind);
DEBUG("mysql_stmt_bind_param(%p, %p) = %d", stmt->ptr, bind, rc);
if (rc)
{
log_text(LOG_FATAL, "mysql_stmt_bind_param() failed");
log_text(LOG_FATAL, "MySQL error: %d \"%s\"", mysql_errno(con),
mysql_error(con));
free(bind);
return 1;
}
free(bind);
return 0;
}
/* Use emulation */
if (stmt->bound_param != NULL)
free(stmt->bound_param);
stmt->bound_param = (db_bind_t *)malloc(len * sizeof(db_bind_t));
if (stmt->bound_param == NULL)
return 1;
memcpy(stmt->bound_param, params, len * sizeof(db_bind_t));
stmt->bound_param_len = len;
return 0;
}
/* Bind results for prepared statement */
int mysql_drv_bind_result(db_stmt_t *stmt, db_bind_t *params, size_t len)
{
MYSQL_BIND *bind;
unsigned int i;
my_bool rc;
if (args.dry_run)
return 0;
db_mysql_conn_t *db_mysql_con =(db_mysql_conn_t *) stmt->connection->ptr;
MYSQL *con = db_mysql_con->mysql;
if (con == NULL || stmt->ptr == NULL)
return 1;
/* Convert sysbench bind structures to MySQL ones */
bind = (MYSQL_BIND *)calloc(len, sizeof(MYSQL_BIND));
if (bind == NULL)
return 1;
for (i = 0; i < len; i++)
convert_to_mysql_bind(&bind[i], ¶ms[i]);
rc = mysql_stmt_bind_result(stmt->ptr, bind);
DEBUG("mysql_stmt_bind_result(%p, %p) = %d", stmt->ptr, bind, rc);
if (rc)
{
free(bind);
return 1;
}
free(bind);
return 0;
}
/* Reset connection to the server by reconnecting with the same parameters. */
static int mysql_drv_reconnect(db_conn_t *sb_con)
{
db_mysql_conn_t *db_mysql_con = (db_mysql_conn_t *) sb_con->ptr;
MYSQL *con = db_mysql_con->mysql;
log_text(LOG_DEBUG, "Reconnecting");
DEBUG("mysql_close(%p)", con);
mysql_close(con);
while (mysql_drv_real_connect(db_mysql_con))
{
if (sb_globals.error)
return DB_ERROR_FATAL;
usleep(1000);
}
log_text(LOG_DEBUG, "Reconnected");
return DB_ERROR_IGNORABLE;
}
/*
Check if the error in a given connection should be fatal or ignored according
to the list of errors in --mysql-ignore-errors.
*/
static db_error_t check_error(db_conn_t *sb_con, const char *func,
const char *query, sb_counter_type_t *counter)
{
sb_list_item_t *pos;
unsigned int tmp;
db_mysql_conn_t *db_mysql_con = (db_mysql_conn_t *) sb_con->ptr;
MYSQL *con = db_mysql_con->mysql;
const unsigned int error = mysql_errno(con);
DEBUG("mysql_errno(%p) = %u", con, sb_con->sql_errno);
sb_con->sql_errno = (int) error;
sb_con->sql_state = mysql_sqlstate(con);
DEBUG("mysql_state(%p) = %s", con, SAFESTR(sb_con->sql_state));
sb_con->sql_errmsg = mysql_error(con);
DEBUG("mysql_error(%p) = %s", con, SAFESTR(sb_con->sql_errmsg));
/*
Check if the error code is specified in --mysql-ignore-errors, and return
DB_ERROR_IGNORABLE if so, or DB_ERROR_FATAL otherwise
*/
SB_LIST_FOR_EACH(pos, args.ignored_errors)
{
const char *val = SB_LIST_ENTRY(pos, value_t, listitem)->data;
tmp = (unsigned int) atoi(val);
if (error == tmp || !strcmp(val, "all"))
{
log_text(LOG_DEBUG, "Ignoring error %u %s, ", error, sb_con->sql_errmsg);
/* Check if we should reconnect */
switch (error)
{
case CR_SERVER_LOST:
case CR_SERVER_GONE_ERROR:
case CR_TCP_CONNECTION:
case CR_SERVER_LOST_EXTENDED:
*counter = SB_CNT_RECONNECT;
return mysql_drv_reconnect(sb_con);
default:
break;
}
*counter = SB_CNT_ERROR;
return DB_ERROR_IGNORABLE;
}
}
if (query)
log_text(LOG_FATAL, "%s returned error %u (%s) for query '%s'",
func, error, sb_con->sql_errmsg, query);
else
log_text(LOG_FATAL, "%s returned error %u (%s)",
func, error, sb_con->sql_errmsg);
*counter = SB_CNT_ERROR;
return DB_ERROR_FATAL;
}
/* Execute prepared statement */
db_error_t mysql_drv_execute(db_stmt_t *stmt, db_result_t *rs)
{
db_conn_t *con = stmt->connection;
char *buf = NULL;
unsigned int buflen = 0;
unsigned int i, j, vcnt;
char need_realloc;
int n;
if (args.dry_run)
return DB_ERROR_NONE;
con->sql_errno = 0;
con->sql_state = NULL;
con->sql_errmsg = NULL;
if (!stmt->emulated)
{
if (stmt->ptr == NULL)
{
log_text(LOG_DEBUG,
"ERROR: exiting mysql_drv_execute(), uninitialized statement");
return DB_ERROR_FATAL;
}
int err = mysql_stmt_execute(stmt->ptr);
DEBUG("mysql_stmt_execute(%p) = %d", stmt->ptr, err);
if (err)
return check_error(con, "mysql_stmt_execute()", stmt->query,
&rs->counter);
err = mysql_stmt_store_result(stmt->ptr);
DEBUG("mysql_stmt_store_result(%p) = %d", stmt->ptr, err);
if (err)
return check_error(con, "mysql_stmt_store_result()", NULL, &rs->counter);
if (mysql_stmt_errno(stmt->ptr) == 0 &&
mysql_stmt_field_count(stmt->ptr) == 0)
{
rs->nrows = (uint32_t) mysql_stmt_affected_rows(stmt->ptr);
DEBUG("mysql_stmt_affected_rows(%p) = %u", stmt->ptr,
(unsigned) rs->nrows);
rs->counter = (rs->nrows > 0) ? SB_CNT_WRITE : SB_CNT_OTHER;
return DB_ERROR_NONE;
}
rs->counter = SB_CNT_READ;
rs->nrows = (uint32_t) mysql_stmt_num_rows(stmt->ptr);
DEBUG("mysql_stmt_num_rows(%p) = %u", rs->statement->ptr,
(unsigned) (rs->nrows));
rs->nfields = (uint32_t) mysql_stmt_field_count(stmt->ptr);
DEBUG("mysql_stmt_field_count(%p) = %u", rs->statement->ptr,
(unsigned) (rs->nfields));
return DB_ERROR_NONE;
}
/* Use emulation */
/* Build the actual query string from parameters list */
need_realloc = 1;
vcnt = 0;
for (i = 0, j = 0; stmt->query[i] != '\0'; i++)
{
again:
if (j+1 >= buflen || need_realloc)
{
buflen = (buflen > 0) ? buflen * 2 : 256;
buf = realloc(buf, buflen);
if (buf == NULL)
{
log_text(LOG_DEBUG, "ERROR: exiting mysql_drv_execute(), memory allocation failure");
return DB_ERROR_FATAL;
}
need_realloc = 0;
}
if (stmt->query[i] != '?')
{
buf[j++] = stmt->query[i];
continue;
}
n = db_print_value(stmt->bound_param + vcnt, buf + j, (int)(buflen - j));
if (n < 0)
{
need_realloc = 1;
goto again;
}
j += (unsigned int)n;
vcnt++;
}
buf[j] = '\0';
db_error_t rc = mysql_drv_query(con, buf, j, rs);
free(buf);
return rc;
}
/* Retrieve the next result of a prepared statement */
db_error_t mysql_drv_stmt_next_result(db_stmt_t *stmt, db_result_t *rs)
{
db_conn_t *con = stmt->connection;
if (args.dry_run)
return DB_ERROR_NONE;
con->sql_errno = 0;
con->sql_state = NULL;
con->sql_errmsg = NULL;
if (stmt->emulated)
return mysql_drv_next_result(con, rs);
if (stmt->ptr == NULL)
{
log_text(LOG_DEBUG,
"ERROR: exiting mysql_drv_stmt_next_result(), "
"uninitialized statement");
return DB_ERROR_FATAL;
}
int err = mysql_stmt_next_result(stmt->ptr);
DEBUG("mysql_stmt_next_result(%p) = %d", stmt->ptr, err);
if (SB_UNLIKELY(err > 0))
return check_error(con, "mysql_drv_stmt_next_result()", stmt->query,
&rs->counter);
if (err == -1)
{