oracl.h

这是书上的代码

	 OParameterCollection GetParameters(void) const;

    // overloaded operators
    ODatabase &operator=(const ODatabase &other);
    
    // execute an arbitrary SQL statement
    oresult ExecuteSQL(const char *sqlstmt) const;
    long	GetRowsProcessed(void) const;

	oresult RemoveFromPool(void) const;

    //new methods in 8.1.6
	OMetaData Describe(const char *SchemaObjectName) throw(OException);
	oresult BeginTrans(void) const;
	oresult CommitTrans(void) const;
	oresult Rollback(void) const;

	 // properties
    const char *GetName(void) const;     // return database name (from the connection)
    const char *GetConnectString(void) const;  // return connect string (without password)
	const char *GetRdbmsVersion(void) const;		// returns RDBMS Version
	long        GetOptions(void) const;
    
    // error handling
    long ServerErrorNumber(void) const;
    const char *GetServerErrorText(void) const;
    oresult ServerErrorReset(void);
    int ServerErrorSQLPos(void) const;
    
	//new properties in 8.1.6
	bool GetAutoCommit(void);
	oresult SetAutoCommit(bool autocommit);
    void SetCacheMaximumSize(long maxsize) throw(OException);
    void SetCacheOptimalSize(long size) throw(OException);

    // function used by other classes to construct ODatabase objects (don't call this!)
    oresult OpenHelper(void *idisp, void *otheri);

private:
    long	m_numrows;
    char    *m_dbname;
    char    *m_dbconnect;
	char    *m_errtext;
	char	*m_version;
    
    // internal helper routines
    oresult Cleanup(void);
    oresult Copy(const ODatabase &other);
	 oresult GetUserPwd(const char *username, const char *pwd, char **retname);
};

class OEXPORT OValue
{
public:
	// construction & destruction
    OValue(void);
    OValue(int intval);       // allows OValue val = 3
    OValue(long longval);     // allows OValue val = 99L;
    OValue(double doubleval); // allows initialization with a double
    OValue(const char *tval); // allows initialization with a string
    OValue(const OValue &other); // copy constructor
	OValue(short *intval);		// Added for ARRAYINSERT
	OValue(int *intval);		// Added for ARRAYINSERT
	OValue(long *longval);		// Added for ARRAYINSERT
	OValue(double *doubleval);// Added for ARRAYINSERT
	OValue(char **tval);		// Added for ARRAYINSERT
	OValue(const OBlob &val) throw(OException);
	OValue(const OClob &val) throw(OException);
	OValue(const OBfile &val) throw(OException);
	OValue(const OObject &val) throw(OException);
	OValue(const ORef &val) throw(OException);
	OValue(const OCollection &val) throw(OException);
	OValue(const OMetaData &val) throw(OException);

	OValue(void* dp, int type); 
	
	~OValue(void);
   
	OValue &operator=(const OValue &other);
    int operator==(const OValue &other) const;
    int operator!=(const OValue &other) const;
    
    // setting the data & type
    oresult Clear(void);    // clear the values
    oresult SetValue(const OValue &val);
    oresult SetValue(const char *val); // sets string value (copies text)
    oresult SetValue(int val);     // sets to int value
    oresult SetValue(long val);
    oresult SetValue(double dval); // sets to double value 
    // oresult SetValue(const void *longval, long len);  // set to long value (not implemented)
	oresult SetValue(char **val);	// Added for ARRAYINSERT
	oresult SetValue(short *val);	// Added for ARRAYINSERT
	oresult SetValue(int *val);		// Added for ARRAYINSERT
	oresult SetValue(long *val);	// Added for ARRAYINSERT
	oresult SetValue(double *dval);	// Added for ARRAYINSERT
	oresult SetValue(const OBlob &val);
	oresult SetValue(const OClob &val);
	oresult SetValue(const OBfile &val);
	oresult SetValue(const OObject &val);
	oresult SetValue(const ORef &val);
	oresult SetValue(const OCollection &val);
	oresult SetValue(const OMetaData &val);

	oresult SetValue(void* raw, int type);
	
	oresult SetEmpty(void); //sets to "empty" object

    oboolean IsNull(void) const;  // returns TRUE if value is NULL (which includes uninitialized)
    long GetObjType(void) const;

    // getting data (overloaded cast operators)
    operator int() const;
    operator long() const;
    operator const char *() const; // returns 0 if instance isn't string (no allocation)
    operator double() const;
    
	operator OBlob () const throw(OException);
	operator OClob () const	throw(OException);
	operator OBfile () const throw(OException);
	operator OObject () const throw(OException);
	operator ORef () const throw(OException);
	operator OCollection () const throw(OException);
	operator OMetaData () const throw(OException);

    // conversions to implementation-specific representations (used by OField)
    oresult FromLocalType(void *localv, int type=0);

    // helper routine for implementation of other classes
    void *Internal(void) const;  
	int IsEqual(const OValue &other) const;

private:
    OOLEvar  *m_value;  // pointer to data representation 

    // helper routines
    oresult Copy(const OValue &other);
    oresult Cleanup(void);
};

// ----- ODynaset -----------------------------------------------

class OEXPORT ODynaset : public OOracleObject
{
public:
    // construction & destruction
    ODynaset(void);
	ODynaset(const ODynaset &other);
	ODynaset(const ODatabase &odb, const char *sql_statement,
					long options = ODYNASET_DEFAULT, OSnapshotID *snapID = NULL);  // construct & open
//	Added for custom dynaset
	ODynaset(const ODatabase &odb, const char *sql_statement,
					unsigned int slicesize, unsigned int perblock,
					unsigned int blocks, unsigned int fetchlimit,
					unsigned int fetchsize, long options = ODYNASET_DEFAULT,
					OSnapshotID *snapID = NULL);

	~ODynaset(void);

	// Open takes an SQL query as an argument.  This constructs a set of records which can
	//    then be accessed.
	oresult Open(const ODatabase &odb, const char *sql_statement,
						long options = ODYNASET_DEFAULT, OSnapshotID *snapID = NULL);  // creates a dynaset object
	//	Added for custom dynaset
	oresult Open(const ODatabase &odb, const char *sql_statement,
					unsigned int slicesize, unsigned int perblock,
					unsigned int blocks, unsigned int fetchlimit,
					unsigned int fetchsize, long options = ODYNASET_DEFAULT,
					OSnapshotID *snapID = NULL);

	 // The clone of a dynaset is looking at the original data, but has a different navigational
    //    position.  Useful if you want to navigate through a set of data without side-effects
    oresult Close(void);

    // getting other objects
    ODynaset Clone(void) const;  // clone a dynaset
	ODatabase GetDatabase(void) const;
    OFieldCollection GetFields(void) const;
    OSession GetSession(void) const;
	OField GetField(int index) const;
    OField GetField(const char *fieldname) const;
	int GetFieldOriginalNameIndex(const char *fieldname) const;
    OConnection GetConnection(void) const;
	ODynasetMark GetMark(void) const;  // bookmark at current position
    ODynasetMark GetLastModifiedMark(void) const;  // get bookmark at last modified record 
    
	 // overloaded operators
    ODynaset &operator=(const ODynaset &other);
    
	 // the sql statement of the dynaset
    oresult SetSQL(const char *sql_statement);  // sets new sql statement for the dynaset
    const char *GetSQL(void) const;  // gets sql statement
	oresult Refresh(void);  // refresh dynaset with current sql statement

    // navigation methods
	oresult MoveFirst(void);   // go to first record in the set
    oresult MoveLast(void);    // go to last record in the set.  Note that this requires that all the records
                            //    in the query be downloaded from the server.  Can be expensive.

	 // MovePrev and MoveNext take a "gopast" argument.  If it is TRUE we can navigate to an
	 //   invalid record before the first or after the last.  If "gopast" is FALSE, then we won't
    //   go before the first or after the last record.  
	 oresult MovePrev(oboolean gopast = TRUE);    // go to previous record
	 oresult MoveNext(oboolean gopast = TRUE);    // go to next record - the most frequently used
	//	extra move methods
	 oresult MovePrevN(long rows, oboolean gopast = TRUE);    // go to previous (n) record
	 oresult MoveNextN(long rows, oboolean gopast = TRUE);    // go to next (n) record
	 oresult MoveRel(long rows, oboolean gopast = TRUE);    // go to relative record (n)
	 oresult MoveTo(long rownum, oboolean gopast = TRUE);    // go to record (n)

	 oresult MoveToMark(const ODynasetMark &odmark);  // repositions to mark (see ODynasetMark class)
     oboolean IsEOF(void) const;  // true if at end of dynaset.  Set to TRUE when you have tried to go
                                //     beyond the end
	 oboolean IsBOF(void) const;  // true if at begin of dynaset
     oboolean IsValidRecord(void) const;  // true if current row is valid
    
	 // editing
     oboolean CanTransact(void) const;  // returns TRUE if transaction processing is enabled 
     oboolean CanUpdate(void) const;  // returns TRUE if this dynaset is updatable
	 int GetEditMode(void) const;  // returns current edit mode: ODYNASET_EDIT_*
	 oresult StartEdit(void);  // starts edit operation
	 oresult CancelEdit(void); // cancels edit operation
     oresult Update(void);     // finishes editing
	 oresult DuplicateRecord(void);  // copy the current record, adds a new record, sets field to copied values

	 // Find methods
	 oresult FindFirst(const char *sql);
	 oresult FindNext(const char *sql = 0);
	 oresult FindPrevious(const char *sql = 0);
	 oresult FindLast(const char *sql);
	 oboolean NoMatch(void);							// TRUE if find failed

	 // Tunable cache and fetch parameters
	 unsigned int GetCacheSliceSize (void);
	 unsigned int GetCacheSlicePerBlock (void);
	 unsigned int GetCacheBlocks (void);
	 unsigned int GetFetchLimit (void);
	 unsigned int GetFetchSize (void);
	 void SetCacheSliceSize (unsigned int slice);
	 void SetCacheSlicePerBlock (unsigned int perblock);
	 void SetCacheBlocks (unsigned int blocks);
	 void SetFetchLimit (unsigned int flimit);
	 void SetFetchSize (unsigned int fsize);
	 oboolean IsCacheChanged(void);	// TRUE if cache or fetch parameters changed

	 // paste to clipboard functions
	 oresult PlsqlOpen(const ODatabase &odb, const char *sqlst, 
							const char *CursorName, long options);
	 oresult PlsqlOpen(const ODatabase &odb, const char *sqlst, const char *CursorName, 
					unsigned int slicesize, unsigned int perblock,
					unsigned int blocks, unsigned int fetchlimit,
					unsigned int fetchsize, long options);

	 // others
	oboolean CanRefresh(void) const;  // our dynasets can always requery
    oboolean CanScroll(void) const;    // always scrollable
	oboolean CanMark(void) const;
    
    long GetOptions(void) const;

    // record manipulation
    oresult AddNewRecord(void);
	oresult DeleteRecord(void);
    
    // record access
	int GetFieldCount(void) const;  // returns # of fields in a record
    long GetRecordCount(void) const;  // (dangerous!) gets total number of records in dynaset
                         // this routine downloads the entire dynaset to the client   
	int GetFieldIndex(const char *fieldname) const;  // gets the index of a field by name

	 // all the Get and Set methods can refer to a column either by index (column position in the
    //    query) or by fieldname (the name of the column as specified in the query).  GetFieldIndex
	 //    can be used to find the index of columns - which is more efficient
    short GetFieldServerType(int index) const;
    short GetFieldServerType(const char *fieldname) const;
	short GetFieldPrecision(int index) const;
    short GetFieldPrecision(const char *fieldname) const;
    short GetFieldScale(int index) const;
	short GetFieldScale(const char *fieldname) const;
    oboolean IsFieldNullOK(int index) const;
    oboolean IsFieldNullOK(const char *fieldname) const;

    long GetFieldSize(int index) const;
    long GetFieldSize(const char *fieldname) const;
	long GetFieldServerSize(int index) const;
    long GetFieldServerSize(const char *fieldname) const;
	oboolean IsFieldTruncated(int index) const;
	oboolean IsFieldTruncated(const char *fieldname) const;
    
	 // get data from a field, either by name or index
    oresult GetFieldValue(int index, OValue *val) const;
	oresult GetFieldValue(const char *fieldname, OValue *val) const;
    oresult GetFieldValue(int index, int *val) const;
	oresult GetFieldValue(const char *fieldname, int *val) const;
    oresult GetFieldValue(int index, long *val) const;
	oresult GetFieldValue(const char *fieldname, long *val) const;
    oresult GetFieldValue(int index, double *val) const;
	oresult GetFieldValue(const char *fieldname, double *val) const;
	oresult GetFieldValue(int index, char *val, unsigned short maxlen) const;
	oresult GetFieldValue(const char *fieldname, char *val, unsigned short maxlen) const;
	oresult GetFieldValue(int index, void __huge *longval, long len, long *readlen) const;
	oresult GetFieldValue(const char *fieldname, void __huge *longval, long len, long *readlen) const;

	oresult GetFieldValue(int index, OBlob  *val) const;
	oresult GetFieldValue(int index, OClob  *val) const;
	oresult GetFieldValue(int index, OBfile *val) const;
	oresult GetFieldValue(int index, ORef   *val) const;
	oresult GetFieldValue(int index, OObject *val) const;
	oresult GetFieldValue(int index, OCollection *val) const;

	oresult GetFieldValue(const char *fieldname, OBlob  *val) const;
	oresult GetFieldValue(const char *fieldname, OClob  *val) const;
	oresult GetFieldValue(const char *fieldname, OBfile *val) const;
	oresult GetFieldValue(const char *fieldname, ORef   *val) const;
	oresult GetFieldValue(const char *fieldname, OObject *val) const;
	oresult GetFieldValue(const char *fieldname, OCollection *val) const;

	oresult GetFieldChunk(int index, void *chunkp, long offset, unsigned short len) const;
	oresult GetFieldChunk(const char *fieldname, void *chunkp, long offset,
							unsigned short len) const;
	oresult GetFieldChunk(int index, void *chunkp, long offset,
							unsigned short len, unsigned short *bytesread) const;
	oresult GetFieldChunk(const char *fieldname, void *chunkp, long offset,
							unsigned short len, unsigned short *bytesread) const;

	// set data in a field, either by name or index
	oresult SetFieldValue(int index, const OValue &val);
	oresult SetFieldValue(const char *fieldname, const OValue &val);
	oresult SetFieldValue(int index, int val);
	oresult SetFieldValue(const char *fieldname, int val);
	oresult SetFieldValue(int index, long val);
	oresult SetFieldValue(const char *fieldname, long val);
	oresult SetFieldValue(int index, double val);
	oresult SetFieldValue(const char *fieldname, double val);
	oresult SetFieldValue(int index, const char *val);
	oresult SetFieldValue(const char *fieldname, const char *val);
	oresult SetFieldValue(int index, const void __huge *longval, long len);
	oresult SetFieldValue(const char *fieldname, const void __huge *longval, long len);

	oresult SetFieldValue(int index, const OBlob  &val);
	oresult SetFieldValue(int index, const OClob  &val);
	oresult SetFieldValue(int index, const OBfile &val);
	oresult SetFieldValue(int index, const ORef   &val);
	oresult SetFieldValue(int index, const OObject &val);
	oresult SetFieldValue(int index, const OCollection &val);

	oresult SetFieldValue(const char *fieldname, const OBlob  &val);
	oresult SetFieldValue(const char *fieldname, const OClob  &val);
	oresult SetFieldValue(const char *fieldname, const OBfile &val);
	oresult SetFieldValue(const char *fieldname, const ORef   &val);
	oresult SetFieldValue(const char *fieldname, const OObject &val);
	oresult SetFieldValue(const char *fieldname, const OCollection &val);

	oresult AppendFieldChunk(int index, const void *chunkp, unsigned short len);
	oresult AppendFieldChunk(const char *fieldname, const void *chunkp, unsigned short len);

	// function used by other classes to construct ODynaset objects (don't call this!)
	oresult OpenHelper(void *idisp, void *otheri);