public:

CDatabase(const wstring delim = L",");

~CDatabase();

bool operator<<(const wstring & os);

bool ConnectedOk() const;

void operator>>(wstring & str) const;

private:

/******************************************/

/* Structure to store information about */

/* a column.

struct Binding{

SQLLEN cDisplaySize; /* size to display */

WCHAR *wszBuffer; /* display buffer */

SQLLEN indPtr; /* size or null */

BOOL fChar; /* character col? */

struct Binding *sNext; /* linked list */

};

void Disconnect();

void HandleDiagnosticRecord(SQLHANDLE hHandle, SQLSMALLINT hType, RETCODE RetCode);

void CDatabase::getAnswer(SQLSMALLINT & cCols);

bool CDatabase::allocateBindings(SQLSMALLINT & cCols);

bool CDatabase::getTitles();

CDatabase(CDatabase const&) = delete;

CDatabase operator=(CDatabase const&) = delete;

private:

//2,147,483,647; 4,294,968,320 65536

//1MB = 1024 * 1024 Bytes

enum { MAX_WIDTH_OF_DATA_IN_COLOMN = 8 * 1024 * 1024 }; // in characters

enum{ NULL_SIZE = 6 }; // size of <NULL>

std::list<Binding> bindings_;

wstring delim_;

wstring answer_;

bool connected_;

SQLHENV hEnv_; // ODBC Environment handle

SQLHDBC hDbc_; // õç õýíäë

SQLHSTMT hStmt_; // ODBC Statement handle