PqField.h

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#ifndef __DCL_PQ_FIELD_H__
#define __DCL_PQ_FIELD_H__      20260106
 
__DCL_BEGIN_NAMESPACE
 
class OutputStream;
 
class PqField : public SQL::Field
{
    DECLARE_CLASSINFO(PqField)
protected:
    int         __index;
    Oid         __type;
    int         __size;
    int         __format;
    size_t      __maxDataSize;
 
protected:
    PqQuery* query() const;
    PqConnection* conn() const;
 
public:
    PqField();
    virtual ~PqField();
 
    bool init(SQL::Query* _query, int _index, const PGresult* _res);
 
    // interfaces
    virtual const wchar_t* serverDataTypeName() const;
    virtual bool __getDataSize(size_t* _size, bool _maxsize);
 
    virtual bool __getData(
        void* _buf,
        size_t* _size,
        SQL::DataType  _bufType
    );
 
protected:
    // implementation
    bool getInteger(void* _buf, size_t* _size);
    bool getUInteger(void* _buf, size_t* _size);
    bool getFloat(void* _buf, size_t* _size);
    bool getDate(SQL::Date* _buf, size_t* _size);
    bool getTime(SQL::Time* _buf, size_t* _size);
    bool getTimeStamp(SQL::TimeStamp* _buf, size_t* _size);
    bool getInterval(SQL::Interval* _buf, size_t* _size);
    bool getNumeric(char* _buf, size_t* _size);
    bool getBytes(char* _buf, size_t* _size);
    bool writeTo(OutputStream* _output, size_t* _size);
};
 
inline PqQuery* PqField::query() const 
{ 
    return (PqQuery*)Field::__queryHandle; 
}
 
inline PqConnection* PqField::conn() const
{
    return query()->conn();
}
 
__DCL_END_NAMESPACE
 
#endif  // __DCL_PQ_FIELD_H__