The Connector class is responsible for connecting components together and for connecting components with the outside world. A Connector creates SessionImpl objects.Every connector library (like the SQLite or the ODBC connector) provides a subclass of this class, an instance of which is registered with the SessionFactory.
Now lets see the constructors and destructors inside this class-
Constructor: A constructor is a member function of a class that has the same name as the class name. It helps to initialize the object of a class.
Connector(); //creates the Connector
Destructor: A destructor is a member function of a class that destroys the object of a class.It also has the same name as of the class but with a prefix ~.
~Connector(); //destroys the Connector
Member FunctionsBelow are some member functions used in the class Connector-
static void bindStringToLongVarChar
bool flag = true
If set to true (default), std::string is bound to SQL_LONGVARCHAR.
This can cause issues with SQL Server, resulting in an error ("The data types varchar and text are incompatible in the equal to operator") when comparing against a VARCHAR.
Set this to false to bind std::string to SQL_VARCHAR.
NOTE: This is a global setting, affecting all sessions. This setting should not be changed after the first Session has been created.
Poco::AutoPtr < Poco::Data::SessionImpl > createSession
const std::string & connectionString,
std::size_t timeout = Poco::Data::SessionImpl::LOGIN_TIMEOUT_DEFAULT
Creates a ODBC SessionImpl object and initializes it with the given connectionString.
name virtual inline
const std::string & name() const;
Returns the name associated with this connector.
static void registerConnector();
Registers the Connector under the Keyword Connector::KEY at the Poco::Data::SessionFactory
stringBoundToLongVarChar static inline
static bool stringBoundToLongVarChar();
Returns true if std::string is bound to SQL_LONGVARCHAR, otherwise false (bound to SQL_VARCHAR).
static void unregisterConnector();
Unregisters the Connector under the Keyword Connector::KEY at the Poco::Data::SessionFactory
static const std::string KEY;
Keyword for creating ODBC sessions.