MariaDB Connector/C++ enables C++ applications to establish client connections to MariaDB database products over TLS.
MariaDB Connector/C++ supports two different formats for connection URLs, the JDBC syntax and the compatibility syntax.
MariaDB Connector/C++ supports a connection URL syntax similar to JDBC.
The JDBC syntax for connection URLs is:
The connection URL:
Requires jdbc:mariadb:// as the protocol component.
Requires the in the hostDescription field.
Accepts an optional database name. If no database is provided, the connection will not select a database.
Some example connection URLs using the JDBC syntax:
jdbc:mariadb:192.0.2.1/
jdbc:mariadb:192.0.2.1/?user=db_user&password=db_user_password
jdbc:mariadb:192.0.2.1/database?user=db_user&password=db_user_password
MariaDB Connector/C++ supports a connection URL syntax for compatibility with MySQL Connector/C++.
The compatibility syntax for connection URLs is only supported for the connection method.
The compatibility syntax for connection URLs is:
The connection URL:
Requires tcp: as the protocol component to connect via TCP/IP.
Requires unix: as the protocol component to connect via Unix socket file. The hostDescription field should be set to localhost, and the localSocket should be set in the properties when you call the connection method.
Requires pipe:// as the protocol component to connect via Windows named pipe. The
Some example connection URLs using the compatibility syntax:
tcp:192.0.2.1/
tcp:192.0.2.1:3307/
tcp:mariadb.example.com/
tcp:mariadb.example.com:3307/
The host description syntax for MariaDB Connector/C++ is:
The host description:
Requires the host field to set the destination host to connect.
Accepts the host field as a host name, IPv4 address, or IPv6 address to connect via TCP/IP.
Accepts the host field as localhost to connect via Unix socket file, when the localSocket
Some example host descriptions:
192.0.2.1
192.0.2.1:3307
mariadb.example.com
mariadb.example.com:3307
MariaDB Connector/C++ accepts optional connection parameters in multiple contexts for both :
They can be specified in a .
They can be specified in a Properties object.
MariaDB Connector/C++ supports several optional connection parameters:
Two categories of methods are available to establish a connection.
MariaDB Connector/C++ can connect using the non-static connect() methods in the sql::Driver class.
The non-static connect() methods in the sql::Driver class have the following prototypes:
Connection* connect(const SQLString& url, Properties& props);
Connection* connect(const SQLString& host, const SQLString& user, const SQLString& pwd);
Connection* connect(const Properties& props);
The non-static connect() methods in the sql::Driver class:
Require an instance of the sql::Driver class to establish a connection.
Accept both forms of .
Provide two prototypes that do not use connection URLs at all.
Return nullptr as the Connection* value when an error occurs, so applications should check the return value before use.
For example:
MariaDB Connector/C++ can connect using the static getConnection() methods in the sql::DriverManager class.
The static getConnection() methods in the sql::DriverManager class have the following prototypes:
static Connection* getConnection(const SQLString& url);
static Connection* getConnection(const SQLString& url, Properties& props);
static Connection* getConnection(const SQLString& url, const SQLString& user, const SQLString& pwd);
The static getConnection() methods in the sql::DriverManager class:
Do not require an instance of the sql::DriverManager class to establish a connection, because they are static.
Accept only the .
Throw an exception when an error occurs, so applications should use try { .. } catch ( .. ) { .. } to catch the exception.
For example:
The following code demonstrates how to connect using the :
The following code demonstrates how to connect with TLS (Transport Layer Security, the successor to SSL) for the :
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key=value format.jdbc:mariadb:192.0.2.1:3307/database?user=db_user&password=db_user_passwordjdbc:mariadb:mariadb.example.com/database?user=db_user&password=db_user_password
jdbc:mariadb:mariadb.example.com:3307/database?user=db_user&password=db_user_password
jdbc:mariadb:localhost/database?localSocket=/var/lib/mysql/mysql.sock&user=db_user&password=db_user_password
hostDescriptionlocalhostpipeRequires the host description in the hostDescription field.
unix:localhost/
pipe:localhost/
Accepts an optional portNumber field to set the TCP/IP port. If it is not provided, the TCP port 3306 is used by default.
Defines the connect timeout value in milliseconds. When set to 0, there is no connect timeout.
int
30000
enabledTlsCipherSuites
A list of permitted ciphers or cipher suites to use for TLS.
string
• enabledSslCipherSuites • enabledSSLCipherSuites
hostName
The host name, IPv4 address, or IPv6 address to connect via TCP/IP. This parameter is only supported by the connection method that does not use a connection URL. If a is provided, the host name, IPv4 address, or IPv6 address should be specified in the connection URL.
jdbcCompliantTruncation
This mode is enabled by default. This mode configures the connector to add STRICT_TRANS_TABLES to , which causes ES to handle truncation issues as errors instead of warnings.
bool
TRUE
keyPassword
Password for the private key.
string
• MARIADB_OPT_TLS_PASSPHRASE
localSocket
Defines the Unix socket file to use for connections to localhost via Unix domain socket. Specify the path of Unix socket file, which can be obtained by querying the system variable: SHOW GLOBAL VARIABLES LIKE'socket';
string
• socket ( connection method only)
log
Non-zero value turns on logging and determines logging level. 0 = no logging 1 = error 2 = warning 3 = info 4 = debug 5 = trace
int
0
logname
The name of file to write the log in. If logname set, and log is not, log will be set to 1(error). Default name is mariadbccpp.log, and it's written to %TEMP% or %USERPROFILE% or current dir on Windows, and in $HOME or in /tmp on other systems. Logging is synchronized between threads, but not between processes.
string
mariadbccpp.log
password
Defines the password of the user account to connect with.
pipe
Defines the name of the named pipe to use for connections to localhost via named pipe on Windows. Specify the name of the named pipe, which is MySQL by default.
string
prepStmtCacheSize
Defines the number of prepared statements that are cached for each connection. This parameter only applies if cachePrepStmts is enabled.
int
250
prepStmtCacheSqlLimit
Defines the maximum length for a prepared statement in the cache. This parameter only applies if cachePrepStmts is enabled. This value consists of length of query itself + length of schema name + 1
int
2048
rewriteBatchedStatements
An optimized mode of executeBatch/executeLargeBatch PreparedStatement methods execution. For INSERT queries, the connector will construct a single query using batch parameter sets. If used with useBulkStmts, rewriteBatchedStatements takes precedence.
schema
The database to select for the connection. If no database is provided, the connection will not select a database. This parameter is only supported by the connection method that does not use a connection URL. If a is provided, the database should be specified in the connection URL.
serverRsaPublicKeyFile
The name of the file that contains the RSA public key of the database server. The format of this file must be in PEM format. This option is used by the caching_sha2_password client authentication plugin.
string
• rsaKey
socketTimeout
Defines the network socket timeout (SO_TIMEOUT) in milliseconds. When set to 0, there is no socket timeout. This connection parameter is not intended to set a maximum time for statements. To set a maximum time for statements, please see the system variable.
int
0
• OPT_READ_TIMEOUT
tcpRcvBuf
The buffer size for TCP/IP and socket communication. tcpSndBuf changes the same buffer value, and the biggest value of the two is selected.
int
0x4000
• tcpSndBuf
tcpSndBuf
The buffer size for TCP/IP and socket communication. tcpRcvBuf changes the same buffer value, and the biggest value of the two is selected.
int
0x4000
• tcpRcvBuf
tlsCA
A path to a PEM file that should contain one or more X509 certificates for trusted Certificate Authorities (CAs).
string
• tlsCa • sslCA
tlsCAPath
A path to a directory that contains one or more PEM files that should each contain one X509 certificate for a trusted Certificate Authority (CA) to use. The directory specified by this option must be processed by the openssl rehash command. This option is only supported if the connector was built with OpenSSL.
string
• tlsCaPath • sslCAPath
tlsCert
Path to the X509 certificate file.
string
• sslCert
tlsCRL
Path to a PEM file that should contain one or more revoked X509 certificates.
string
• tlsCrl • sslCRL
tlsCRLPath
A path to a directory that contains one or more PEM files that should each contain one revoked X509 certificate. The directory specified by this option must be processed by the openssl rehash command. This option is only supported if the connector was built with OpenSSL.
string
• tlsCrlPath • sslCRLPath
tlsKey
File path to a private key file.
string
• sslKey
tlsPeerFP
A SHA1 fingerprint of a server certificate for validation during the TLS handshake.
string
• tlsPeerFp • MARIADB_OPT_SSL_FP
tlsPeerFPList
A file containing one or more SHA1 fingerprints of server certificates for validation during the TLS handshake.
string
• tlsPeerFpList • MARIADB_OPT_SSL_FP_LIST
trustServerCertificate
When using TLS, do not check server's certificate.
bool
TRUE
useBulkStmts
An optimized mode of executeBatch/executeLargeBatch PreparedStatement methods execution that uses the MariaDB bulk execution feature. If used with rewriteBatchedStatements, rewriteBatchedStatements takes precedence.
useCompression
Compresses network traffic between the client and server.
bool
FALSE
• CLIENT_COMPRESS
user
Defines the user name of the user account to connect with.
• userName ( connection method only)
useServerPrepStmts
Defines whether the connector uses server-side prepared statements using the , , and statements. By default, the connector uses client-side prepared statements.
bool
FALSE
useTls
Whether to force TLS. This enables TLS with the default system settings.
bool
FALSE
• useSsl • useSSL
autoReconnect
Defines whether the connector automatically reconnects after a connection failure.
bool
FALSE
• OPT_RECONNECT
cachePrepStmts
Defines whether the prepared statement cache is enabled.
bool
FALSE
connectTimeout
jdbc:mariadb://<hostDescription>/[<database>] [?<key1>=<value1>[&<key2>=<value2>]](tcp|unix|pipe)://<hostDescription>[/]<host>[:<portNumber>]jdbc:mariadb://192.0.2.1:3306/database?user=db_user&password=db_user_password// Instantiate Driver
sql::Driver* driver = sql::mariadb::get_driver_instance();
// Configure Connection
// The URL or TCP connection string format is
// ``jdbc:mariadb://host:port/database``.
sql::SQLString url("jdbc:mariadb://192.0.2.1:3306/test");
// Use a properties map for the other connection options
sql::Properties properties({
{"user", "db_user"},
{"password", "db_user_password"},
});
// Establish Connection
// Use a smart pointer for extra safety
std::unique_ptr<sql::Connection> conn(driver->connect(url, properties));
if (!conn) {
cerr << "Invalid database connection" << endl;
exit (EXIT_FAILURE);
}try {
// Configure Connection
// The URL or TCP connection string format is
// ``jdbc:mariadb://host:port/database``.
sql::SQLString url("jdbc:mariadb://192.0.2.1:3306/test");
// Use a properties map for the other connection options
sql::Properties properties({
{"user", "db_user"},
{"password", "db_user_password"},
});
// Establish Connection
// Use a smart pointer for extra safety
std::unique_ptr<sql::Connection> conn(DriverManager::getConnection(url, properties));
} catch (...) {
cerr << "Invalid database connection" << endl;
exit (EXIT_FAILURE);
}// Includes
#include <iostream>
#include <mariadb/conncpp.hpp>
// Main Process
int main(int argc, char **argv)
{
try {
// Instantiate Driver
sql::Driver* driver = sql::mariadb::get_driver_instance();
// Configure Connection
// The URL or TCP connection string format is
// ``jdbc:mariadb://host:port/database``.
sql::SQLString url("jdbc:mariadb://192.0.2.1:3306/test");
// Use a properties map for the other connection options
sql::Properties properties({
{"user", "db_user"},
{"password", "db_user_password"},
});
// Establish Connection
// Use a smart pointer for extra safety
std::unique_ptr<sql::Connection> conn(driver->connect(url, properties));
// Use Connection
// ...
// Close Connection
conn->close();
}
// Catch Exceptions
catch (sql::SQLException& e) {
std::cerr << "Error Connecting to the database: "
<< e.what() << std::endl;
// Exit (Failed)
return 1;
}
// Exit (Success)
return 0;
}// Includes
#include <iostream>
#include <mariadb/conncpp.hpp>
// Main Process
int main(int argc, char **argv)
{
try {
// Instantiate Driver
sql::Driver* driver = sql::mariadb::get_driver_instance();
// Configure Connection
// The URL or TCP connection string format is
// ``jdbc:mariadb://host:port/database``.
sql::SQLString url("jdbc:mariadb://192.0.2.1:3306/test");
// Use a properties map for the user name and password
//The ``useTls`` option enables TLS
//The ``tlsCA`` option specifies path to a PEM file that contains a X509 certificate for trusted Certificate Authorities (CAs).
sql::Properties properties({
{"user", "db_user"},
{"password", "db_user_password"},
{"useTls", "true"},
{"tlsCA", "tls-ca-root.pem"}
});
// Establish Connection
// Use a smart pointer for extra safety
std::unique_ptr<sql::Connection> conn(driver->connect(url, properties));
// Use Connection
// ...
// Close Connection
conn->close();
}
// Catch Exceptions
catch (sql::SQLException& e) {
std::cerr << "Error Connecting to the database: "
<< e.what() << std::endl;
// Exit (Failed)
return 1;
}
// Exit (Success)
return 0;
}