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windows-nt/Source/XPSP1/NT/public/sdk/inc/mfc42/afxdb.h

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2020-09-26 03:20:57 -05:00
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#ifndef __AFXDB_H__
#define __AFXDB_H__
#ifdef _AFX_NO_DB_SUPPORT
#error Database classes not supported in this library variant.
#endif
#ifndef __AFXEXT_H__
#include <afxext.h>
#endif
#ifndef __AFXDB__H__
#include <afxdb_.h> // shared header DAO database classes
#endif
// include standard SQL/ODBC "C" APIs
#ifndef __SQL
#define SQL_NOUNICODEMAP
#include <sql.h> // core
#endif
#ifndef __SQLEXT
#include <sqlext.h> // extensions
#endif
#ifdef _AFX_MINREBUILD
#pragma component(minrebuild, off)
#endif
#ifndef _AFX_FULLTYPEINFO
#pragma component(mintypeinfo, on)
#endif
#ifndef _AFX_NOFORCE_LIBS
/////////////////////////////////////////////////////////////////////////////
// Win32 libraries
#ifdef _AFXDLL
#if defined(_DEBUG) && !defined(_AFX_MONOLITHIC)
#ifndef _UNICODE
#pragma comment(lib, "mfcd42d.lib")
#else
#pragma comment(lib, "mfcd42ud.lib")
#endif
#endif
#endif
#pragma comment(lib, "odbc32.lib")
#pragma comment(lib, "odbccp32.lib")
#endif //!_AFX_NOFORCE_LIBS
/////////////////////////////////////////////////////////////////////////////
#ifdef _AFX_PACKING
#pragma pack(push, _AFX_PACKING)
#endif
/////////////////////////////////////////////////////////////////////////////
// AFXDB - MFC SQL/ODBC/Database support
// Classes declared in this file
//CException
class CDBException; // abnormal return value
//CFieldExchange
class CFieldExchange; // Recordset Field Exchange
//CObject
class CDatabase; // Connecting to databases
class CRecordset; // Data result sets
//CObject
//CCmdTarget;
//CWnd
//CView
//CScrollView
//CFormView
class CRecordView; // view records with a form
// Non CObject classes
class CDBVariant;
struct CRecordsetStatus;
struct CFieldInfo;
struct CODBCFieldInfo;
struct CODBCParamInfo;
/////////////////////////////////////////////////////////////////////////////
// ODBC helpers
// return code left in 'nRetCode'
// This MACRO is now out-of-date (kept for backward compatibility)
#define AFX_ODBC_CALL(SQLFunc) \
do \
{ \
} while ((nRetCode = (SQLFunc)) == SQL_STILL_EXECUTING)
// Not really required, but kept for compatibilty
#define AFX_SQL_SYNC(SQLFunc) \
do \
{ \
nRetCode = SQLFunc; \
} while (0)
// Now out-of-date (prs not used) but kept for compatibility
#define AFX_SQL_ASYNC(prs, SQLFunc) AFX_ODBC_CALL(SQLFunc)
// Max display length in chars of timestamp (date & time) value
#define TIMESTAMP_PRECISION 23
// AFXDLL support
#undef AFX_DATA
#define AFX_DATA AFX_DB_DATA
// Miscellaneous sizing info
#define MAX_CURRENCY 30 // Max size of Currency($) string
#define MAX_TNAME_LEN 64 // Max size of table names
#if _MFC_VER >= 0x0600
#define MAX_FNAME_LEN 256 // Max size of field names
#else
#define MAX_FNAME_LEN 64 // Max size of field names
#endif
#define MAX_DBNAME_LEN 32 // Max size of a database name
#define MAX_DNAME_LEN 256 // Max size of Recordset names
#define MAX_CONNECT_LEN 512 // Max size of Connect string
#define MAX_CURSOR_NAME 18 // Max size of a cursor name
#define DEFAULT_FIELD_TYPE SQL_TYPE_NULL // pick "C" data type to match SQL data type
// Timeout and net wait defaults
#define DEFAULT_LOGIN_TIMEOUT 15 // seconds to before fail on connect
#define DEFAULT_QUERY_TIMEOUT 15 // seconds to before fail waiting for results
// Field Flags, used to indicate status of fields
#define AFX_SQL_FIELD_FLAG_DIRTY 0x1
#define AFX_SQL_FIELD_FLAG_NULL 0x2
// Update options flags
#define AFX_SQL_SETPOSUPDATES 0x0001
#define AFX_SQL_POSITIONEDSQL 0x0002
#define AFX_SQL_GDBOUND 0x0004
/////////////////////////////////////////////////////////////////////////////
// CDBException - something gone wrong
// Dbkit extended error codes
#define AFX_SQL_ERROR 1000
#define AFX_SQL_ERROR_CONNECT_FAIL AFX_SQL_ERROR+1
#define AFX_SQL_ERROR_RECORDSET_FORWARD_ONLY AFX_SQL_ERROR+2
#define AFX_SQL_ERROR_EMPTY_COLUMN_LIST AFX_SQL_ERROR+3
#define AFX_SQL_ERROR_FIELD_SCHEMA_MISMATCH AFX_SQL_ERROR+4
#define AFX_SQL_ERROR_ILLEGAL_MODE AFX_SQL_ERROR+5
#define AFX_SQL_ERROR_MULTIPLE_ROWS_AFFECTED AFX_SQL_ERROR+6
#define AFX_SQL_ERROR_NO_CURRENT_RECORD AFX_SQL_ERROR+7
#define AFX_SQL_ERROR_NO_ROWS_AFFECTED AFX_SQL_ERROR+8
#define AFX_SQL_ERROR_RECORDSET_READONLY AFX_SQL_ERROR+9
#define AFX_SQL_ERROR_SQL_NO_TOTAL AFX_SQL_ERROR+10
#define AFX_SQL_ERROR_ODBC_LOAD_FAILED AFX_SQL_ERROR+11
#define AFX_SQL_ERROR_DYNASET_NOT_SUPPORTED AFX_SQL_ERROR+12
#define AFX_SQL_ERROR_SNAPSHOT_NOT_SUPPORTED AFX_SQL_ERROR+13
#define AFX_SQL_ERROR_API_CONFORMANCE AFX_SQL_ERROR+14
#define AFX_SQL_ERROR_SQL_CONFORMANCE AFX_SQL_ERROR+15
#define AFX_SQL_ERROR_NO_DATA_FOUND AFX_SQL_ERROR+16
#define AFX_SQL_ERROR_ROW_UPDATE_NOT_SUPPORTED AFX_SQL_ERROR+17
#define AFX_SQL_ERROR_ODBC_V2_REQUIRED AFX_SQL_ERROR+18
#define AFX_SQL_ERROR_NO_POSITIONED_UPDATES AFX_SQL_ERROR+19
#define AFX_SQL_ERROR_LOCK_MODE_NOT_SUPPORTED AFX_SQL_ERROR+20
#define AFX_SQL_ERROR_DATA_TRUNCATED AFX_SQL_ERROR+21
#define AFX_SQL_ERROR_ROW_FETCH AFX_SQL_ERROR+22
#define AFX_SQL_ERROR_INCORRECT_ODBC AFX_SQL_ERROR+23
#define AFX_SQL_ERROR_UPDATE_DELETE_FAILED AFX_SQL_ERROR+24
#define AFX_SQL_ERROR_DYNAMIC_CURSOR_NOT_SUPPORTED AFX_SQL_ERROR+25
#define AFX_SQL_ERROR_FIELD_NOT_FOUND AFX_SQL_ERROR+26
#define AFX_SQL_ERROR_BOOKMARKS_NOT_SUPPORTED AFX_SQL_ERROR+27
#define AFX_SQL_ERROR_BOOKMARKS_NOT_ENABLED AFX_SQL_ERROR+28
#define AFX_SQL_ERROR_MAX AFX_SQL_ERROR+29
class CDBException : public CException
{
DECLARE_DYNAMIC(CDBException)
// Attributes
public:
RETCODE m_nRetCode;
CString m_strError;
CString m_strStateNativeOrigin;
// Implementation (use AfxThrowDBException to create)
public:
CDBException(RETCODE nRetCode = SQL_SUCCESS);
virtual void BuildErrorString(CDatabase* pdb, HSTMT hstmt,
BOOL bTrace = TRUE);
void Empty();
virtual ~CDBException();
virtual BOOL GetErrorMessage(LPTSTR lpszError, UINT nMaxError,
PUINT pnHelpContext = NULL);
#ifdef _DEBUG
void TraceErrorMessage(LPCTSTR szTrace) const;
#endif // DEBUG
};
void AFXAPI AfxThrowDBException(RETCODE nRetCode, CDatabase* pdb, HSTMT hstmt);
//////////////////////////////////////////////////////////////////////////////
// CDatabase - a SQL Database
class CDatabase : public CObject
{
DECLARE_DYNAMIC(CDatabase)
// Constructors
public:
CDatabase();
enum DbOpenOptions
{
openExclusive = 0x0001, // Not implemented
openReadOnly = 0x0002, // Open database read only
useCursorLib = 0x0004, // Use ODBC cursor lib
noOdbcDialog = 0x0008, // Don't display ODBC Connect dialog
forceOdbcDialog = 0x0010, // Always display ODBC connect dialog
};
virtual BOOL Open(LPCTSTR lpszDSN, BOOL bExclusive = FALSE,
BOOL bReadonly = FALSE, LPCTSTR lpszConnect = _T("ODBC;"),
BOOL bUseCursorLib = TRUE);
virtual BOOL OpenEx(LPCTSTR lpszConnectString, DWORD dwOptions = 0);
virtual void Close();
// Attributes
public:
HDBC m_hdbc;
BOOL IsOpen() const; // Database successfully opened?
BOOL CanUpdate() const;
BOOL CanTransact() const; // Are Transactions supported?
CString GetDatabaseName() const;
const CString& GetConnect() const;
DWORD GetBookmarkPersistence() const;
int GetCursorCommitBehavior() const;
int GetCursorRollbackBehavior() const;
// Operations
public:
void SetLoginTimeout(DWORD dwSeconds);
void SetQueryTimeout(DWORD dwSeconds);
// transaction control
BOOL BeginTrans();
BOOL CommitTrans();
BOOL Rollback();
void ExecuteSQL(LPCTSTR lpszSQL);
// Cancel asynchronous operation
void Cancel();
// Overridables
public:
// set special options
virtual void OnSetOptions(HSTMT hstmt);
// Implementation
public:
virtual ~CDatabase();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
BOOL m_bTransactionPending;
#endif //_DEBUG
// general error check
virtual BOOL Check(RETCODE nRetCode) const;
BOOL PASCAL CheckHstmt(RETCODE, HSTMT hstmt) const;
// Note: CDatabase::BindParameters is now documented and is no longer
// officially 'implementation.' Feel free to use it. It stays here
// because moving it would break binary compatibility.
virtual void BindParameters(HSTMT hstmt);
void ReplaceBrackets(LPTSTR lpchSQL);
BOOL m_bStripTrailingSpaces;
BOOL m_bIncRecordCountOnAdd;
BOOL m_bAddForUpdate;
char m_chIDQuoteChar;
char m_reserved1[3]; // pad to even 4 bytes
void SetSynchronousMode(BOOL bSynchronous); // Obsolete, doe nothing
protected:
CString m_strConnect;
CPtrList m_listRecordsets; // maintain list to ensure CRecordsets all closed
int nRefCount;
BOOL m_bUpdatable;
BOOL m_bTransactions;
SWORD m_nTransactionCapable;
SWORD m_nCursorCommitBehavior;
SWORD m_nCursorRollbackBehavior;
DWORD m_dwUpdateOptions;
DWORD m_dwBookmarkAttributes; // cache driver bookmark persistence
DWORD m_dwLoginTimeout;
HSTMT m_hstmt;
DWORD m_dwQueryTimeout;
virtual void ThrowDBException(RETCODE nRetCode);
void AllocConnect(DWORD dwOptions);
BOOL Connect(DWORD dwOptions);
void VerifyConnect();
void GetConnectInfo();
void Free();
// friend classes that call protected CDatabase overridables
friend class CRecordset;
friend class CFieldExchange;
friend class CDBException;
};
//////////////////////////////////////////////////////////////////////////////
// CFieldExchange - for field exchange
class CFieldExchange
{
// Attributes
public:
enum RFX_Operation
{
BindParam, // register users parameters with ODBC SQLBindParameter
RebindParam, // migrate param values to proxy array before Requery
BindFieldToColumn, // register users fields with ODBC SQLBindCol
BindFieldForUpdate, // temporarily bind columns before update (via SQLSetPos)
UnbindFieldForUpdate, // unbind columns after update (via SQLSetPos)
Fixup, // Set string lengths, clear status bits
MarkForAddNew, // Prepare fields and flags for addnew operation
MarkForUpdate, // Prepare fields and flags for update operation
Name, // append dirty field name
NameValue, // append dirty name=value
Value, // append dirty value or parameter marker
SetFieldNull, // Set status bit for null value
StoreField, // archive values of current record
LoadField, // reload archived values into current record
AllocCache, // allocate cache used for dirty field check
AllocMultiRowBuffer, // allocate buffer holding multi rows of data
DeleteMultiRowBuffer, // delete buffer holding multi rows of data
#ifdef _DEBUG
DumpField, // dump bound field name and value
#endif
};
UINT m_nOperation; // Type of exchange operation
CRecordset* m_prs; // recordset handle
// Operations
enum FieldType
{
noFieldType = -1,
outputColumn = 0,
param = SQL_PARAM_INPUT,
inputParam = param,
outputParam = SQL_PARAM_OUTPUT,
inoutParam = SQL_PARAM_INPUT_OUTPUT,
};
// Operations (for implementors of RFX procs)
BOOL IsFieldType(UINT* pnField);
// Indicate purpose of subsequent RFX calls
void SetFieldType(UINT nFieldType);
// Implementation
CFieldExchange(UINT nOperation, CRecordset* prs, void* pvField = NULL);
void Default(LPCTSTR szName,
void* pv, LONG* plLength, int nCType, UINT cbValue, UINT cbPrecision);
// long binary helpers
long GetLongBinarySize(int nField);
void GetLongBinaryData(int nField, CLongBinary& lb, long* plSize);
BYTE* ReallocLongBinary(CLongBinary& lb, long lSizeRequired,
long lReallocSize);
// Current type of field
UINT m_nFieldType;
UINT m_nFieldFound;
CString* m_pstr; // Field name or destination for building various SQL clauses
BOOL m_bField; // Value to set for SetField operation
void* m_pvField; // For indicating an operation on a specific field
LPCTSTR m_lpszSeparator; // append after field names
UINT m_nFields; // count of fields for various operations
UINT m_nParams; // count of fields for various operations
UINT m_nParamFields; // count of fields for various operations
HSTMT m_hstmt; // For SQLBindParameter on update statement
long m_lDefaultLBFetchSize; // For fetching CLongBinary data of unknown len
long m_lDefaultLBReallocSize; // For fetching CLongBinary data of unknown len
#ifdef _DEBUG
CDumpContext* m_pdcDump;
#endif //_DEBUG
};
#if _MFC_VER >= 0x0600
/////////////////////////////////////////////////////////////////////////////
// Global helper
HENV AFXAPI AfxGetHENV();
#endif
/////////////////////////////////////////////////////////////////////////////
// Recordset Field Exchange helpers
void AFXAPI AfxStoreField(CRecordset& rs, UINT nField, void* pvField);
void AFXAPI AfxLoadField(CRecordset& rs, UINT nField,
void* pvField, long* plLength);
BOOL AFXAPI AfxCompareValueByRef(void* pvData, void* pvCache, int nDataType);
void AFXAPI AfxCopyValueByRef(void* pvCache, void* pvData,
long* plLength, int nDataType);
/////////////////////////////////////////////////////////////////////////////
// Standard Recordset Field Exchange routines
// text data
void AFXAPI RFX_Text(CFieldExchange* pFX, LPCTSTR szName, CString& value,
// Default max length for char and varchar, default datasource type
int nMaxLength = 255, int nColumnType = SQL_VARCHAR, short nScale = 0);
#if _MFC_VER >= 0x0600
void AFXAPI RFX_Text(CFieldExchange* pFX, LPCTSTR szName, LPTSTR value,
int nMaxLength, int nColumnType = SQL_VARCHAR, short nScale = 0);
#endif
// boolean data
void AFXAPI RFX_Bool(CFieldExchange* pFX, LPCTSTR szName, BOOL& value);
// integer data
void AFXAPI RFX_Long(CFieldExchange* pFX, LPCTSTR szName, long& value);
void AFXAPI RFX_Int(CFieldExchange* pFX, LPCTSTR szName, int& value);
void AFXAPI RFX_Single(CFieldExchange* pFX, LPCTSTR szName, float& value);
void AFXAPI RFX_Double(CFieldExchange* pFX, LPCTSTR szName, double& value);
// date and time
void AFXAPI RFX_Date(CFieldExchange* pFX, LPCTSTR szName, CTime& value);
void AFXAPI RFX_Date(CFieldExchange* pFX, LPCTSTR szName, TIMESTAMP_STRUCT& value);
#if _MFC_VER >= 0x0600
void AFXAPI RFX_Date(CFieldExchange* pFX, LPCTSTR szName, COleDateTime& value);
#endif
// Binary data
void AFXAPI RFX_Binary(CFieldExchange* pFX, LPCTSTR szName, CByteArray& value,
// Default max length is for binary and varbinary
int nMaxLength = 255);
void AFXAPI RFX_Byte(CFieldExchange* pFX, LPCTSTR szName, BYTE& value);
void AFXAPI RFX_LongBinary(CFieldExchange* pFX, LPCTSTR szName, CLongBinary& value);
/////////////////////////////////////////////////////////////////////////////
// Bulk Recordset Field Exchange helpers
void AFXAPI AfxRFXBulkDefault(CFieldExchange* pFX, LPCTSTR szName,
void* pv, long* rgLengths, int nCType, UINT cbValue);
/////////////////////////////////////////////////////////////////////////////
// Bulk Recordset Field Exchange routines
void AFXAPI RFX_Text_Bulk(CFieldExchange* pFX, LPCTSTR szName,
LPSTR* prgStrVals, long** prgLengths, int nMaxLength);
void AFXAPI RFX_Bool_Bulk(CFieldExchange* pFX, LPCTSTR szName,
BOOL** prgBoolVals, long** prgLengths);
void AFXAPI RFX_Int_Bulk(CFieldExchange* pFX, LPCTSTR szName,
int** prgIntVals, long** prgLengths);
void AFXAPI RFX_Long_Bulk(CFieldExchange* pFX, LPCTSTR szName,
long** prgLongVals, long** prgLengths);
void AFXAPI RFX_Single_Bulk(CFieldExchange* pFX, LPCTSTR szName,
float** prgFltVals, long** prgLengths);
void AFXAPI RFX_Double_Bulk(CFieldExchange* pFX, LPCTSTR szName,
double** prgDblVals, long** prgLengths);
void AFXAPI RFX_Date_Bulk(CFieldExchange* pFX, LPCTSTR szName,
TIMESTAMP_STRUCT** prgTSVals, long** prgLengths);
void AFXAPI RFX_Byte_Bulk(CFieldExchange* pFX, LPCTSTR szName,
BYTE** prgByteVals, long** prgLengths);
void AFXAPI RFX_Binary_Bulk(CFieldExchange* pFX, LPCTSTR szName,
BYTE** prgByteVals, long** prgLengths, int nMaxLength);
/////////////////////////////////////////////////////////////////////////////
// Database Dialog Data Exchange cover routines
// Cover routines provide database semantics on top of DDX routines
// simple text operations
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, BYTE& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, int& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, UINT& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, long& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, DWORD& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, CString& value,
CRecordset* pRecordset);
#if _MFC_VER >= 0x0600
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, LPTSTR pstrValue,
int nMaxLen, CRecordset* pRecordset);
#endif
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, double& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, float& value,
CRecordset* pRecordset);
#if _MFC_VER >= 0x0600
void AFXAPI DDX_FieldText(CDataExchange* pDX, int nIDC, CTime& value,
CRecordset* pRecordset);
#endif
// special control types
void AFXAPI DDX_FieldCheck(CDataExchange* pDX, int nIDC, int& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldRadio(CDataExchange* pDX, int nIDC, int& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldLBString(CDataExchange* pDX, int nIDC,
CString& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldCBString(CDataExchange* pDX, int nIDC,
CString& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldLBIndex(CDataExchange* pDX, int nIDC, int& index,
CRecordset* pRecordset);
void AFXAPI DDX_FieldCBIndex(CDataExchange* pDX, int nIDC, int& index,
CRecordset* pRecordset);
void AFXAPI DDX_FieldLBStringExact(CDataExchange* pDX, int nIDC,
CString& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldCBStringExact(CDataExchange* pDX, int nIDC,
CString& value,
CRecordset* pRecordset);
void AFXAPI DDX_FieldScroll(CDataExchange* pDX, int nIDC, int& value,
CRecordset* pRecordset);
//////////////////////////////////////////////////////////////////////////////
// CRecordset - the result of a SQL Statement
#define AFX_DB_USE_DEFAULT_TYPE (0xFFFFFFFF)
// Most Move constants out of date
// #define AFX_MOVE_FIRST 0x80000000L
// #define AFX_MOVE_PREVIOUS (-1L)
#define AFX_MOVE_REFRESH 0L
// #define AFX_MOVE_NEXT (+1L)
// #define AFX_MOVE_LAST 0x7fffffffL
#define AFX_RECORDSET_STATUS_OPEN (+1L)
#define AFX_RECORDSET_STATUS_CLOSED 0L
#define AFX_RECORDSET_STATUS_UNKNOWN (-1L)
class CRecordset : public CObject
{
DECLARE_DYNAMIC(CRecordset)
// Constructor
public:
CRecordset(CDatabase* pDatabase = NULL);
public:
virtual ~CRecordset();
enum OpenType
{
dynaset, // uses SQLExtendedFetch, keyset driven cursor
snapshot, // uses SQLExtendedFetch, static cursor
forwardOnly, // uses SQLFetch
dynamic // uses SQLExtendedFetch, dynamic cursor
};
enum OpenOptions
{
none = 0x0,
readOnly = 0x0004,
appendOnly = 0x0008,
skipDeletedRecords = 0x0010, // turn on skipping of deleted records, Will slow Move(n).
noDirtyFieldCheck = 0x0020, // disable automatic dirty field checking
useBookmarks = 0x0100, // turn on bookmark support
useMultiRowFetch = 0x0200, // turn on multi-row fetch model
userAllocMultiRowBuffers = 0x0400, // if multi-row fetch on, user will alloc memory for buffers
useExtendedFetch = 0x0800, // use SQLExtendedFetch with forwardOnly type recordsets
executeDirect = 0x2000, // Directly execute SQL rather than prepared execute
optimizeBulkAdd = 0x4000, // Use prepared HSTMT for multiple AddNews, dirty fields must not change.
firstBulkAdd = 0x8000, // INTERNAL to MFC, don't specify on Open.
};
virtual BOOL Open(UINT nOpenType = AFX_DB_USE_DEFAULT_TYPE,
LPCTSTR lpszSQL = NULL, DWORD dwOptions = none);
virtual void Close();
// Attributes
public:
HSTMT m_hstmt; // Source statement for this resultset
CDatabase* m_pDatabase; // Source database for this resultset
CString m_strFilter; // Where clause
CString m_strSort; // Order By Clause
BOOL CanAppend() const; // Can AddNew be called?
BOOL CanRestart() const; // Can Requery be called to restart a query?
BOOL CanScroll() const; // Can MovePrev and MoveFirst be called?
BOOL CanTransact() const; // Are Transactions supported?
BOOL CanUpdate() const; // Can Edit/AddNew/Delete be called?
BOOL CanBookmark() const; // Can Get/SetBookmark be called?
const CString& GetSQL() const; // SQL executed for this recordset
const CString& GetTableName() const; // Table name
BOOL IsOpen() const; // Recordset successfully opened?
BOOL IsBOF() const; // Beginning Of File
BOOL IsEOF() const; // End Of File
BOOL IsDeleted() const; // On a deleted record
BOOL IsFieldDirty(void *pv); // has field been updated?
BOOL IsFieldNull(void *pv); // is field NULL valued?
BOOL IsFieldNullable(void *pv); // can field be set to a NULL value
long GetRecordCount() const; // Records seen so far or -1 if unknown
void GetStatus(CRecordsetStatus& rStatus) const;
// Operations
public:
// cursor operations
void MoveNext();
void MovePrev();
void MoveFirst();
void MoveLast();
virtual void Move(long nRows, WORD wFetchType = SQL_FETCH_RELATIVE);
void SetAbsolutePosition(long nRows);
void GetBookmark(CDBVariant& varBookmark);
void SetBookmark(const CDBVariant& varBookmark);
virtual void SetRowsetSize(DWORD dwNewRowsetSize);
DWORD GetRowsetSize() const;
DWORD GetRowsFetched() const;
virtual void CheckRowsetError(RETCODE nRetCode);
void RefreshRowset(WORD wRow, WORD wLockType = SQL_LOCK_NO_CHANGE);
void SetRowsetCursorPosition(WORD wRow, WORD wLockType = SQL_LOCK_NO_CHANGE);
WORD GetRowStatus(WORD wRow) const;
// edit buffer operations
virtual void AddNew(); // add new record at the end
virtual void Edit(); // start editing
virtual BOOL Update(); // update it
virtual void Delete(); // delete the current record
void CancelUpdate(); // cancel pending Edit/AddNew
BOOL FlushResultSet() const;
// field operations
short GetODBCFieldCount() const;
void GetODBCFieldInfo(short nIndex, CODBCFieldInfo& fieldinfo);
void GetODBCFieldInfo(LPCTSTR lpszName, CODBCFieldInfo& fieldinfo);
void GetFieldValue(LPCTSTR lpszName, CDBVariant& varValue,
short nFieldType = DEFAULT_FIELD_TYPE);
void GetFieldValue(short nIndex, CDBVariant& varValue,
short nFieldType = DEFAULT_FIELD_TYPE);
void GetFieldValue(LPCTSTR lpszName, CString& strValue);
void GetFieldValue(short nIndex, CString& strValue);
void SetFieldDirty(void *pv, BOOL bDirty = TRUE);
void SetFieldNull(void *pv, BOOL bNull = TRUE);
void SetParamNull(int nIndex, BOOL bNull = TRUE);
// locking control during Edit
enum LockMode
{
optimistic,
pessimistic,
};
void SetLockingMode(UINT nMode);
// Recordset operations
virtual BOOL Requery(); // Re-execute query based on new params
// Cancel asynchronous operation
void Cancel();
// Overridables
public:
// Get default connect string
virtual CString GetDefaultConnect();
// Get SQL to execute
virtual CString GetDefaultSQL();
// set special options
virtual void OnSetOptions(HSTMT hstmt);
// for recordset field exchange
virtual void DoFieldExchange(CFieldExchange* pFX);
virtual void DoBulkFieldExchange(CFieldExchange* pFX);
// Implementation
public:
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif //_DEBUG
virtual BOOL Check(RETCODE nRetCode) const; // general error check
void InitRecord();
void ResetCursor();
void CheckRowsetCurrencyStatus(UWORD wFetchType, long nRows);
RETCODE FetchData(UWORD wFetchType, SDWORD nRow,
DWORD* pdwRowsFetched);
void SkipDeletedRecords(UWORD wFetchType, long nRows,
DWORD* pdwRowsFetched, RETCODE* pnRetCode);
virtual void SetRowsetCurrencyStatus(RETCODE nRetCode,
UWORD wFetchType, long nRows, DWORD dwRowsFetched);
virtual void PreBindFields(); // called before data fields are bound
UINT m_nFields; // number of RFX fields
UINT m_nParams; // number of RFX params
BOOL m_bCheckCacheForDirtyFields; // switch for dirty field checking
BOOL m_bRebindParams; // date or UNICODE text parameter existence flag
BOOL m_bLongBinaryColumns; // long binary column existence flag
BOOL m_bUseUpdateSQL; // uses SQL-based updates
DWORD m_dwOptions; // archive dwOptions on Open
SWORD m_nResultCols; // number of columns in result set
BOOL m_bUseODBCCursorLib; // uses ODBC cursor lib if m_pDatabase not Open
CODBCFieldInfo* m_rgODBCFieldInfos; // Array of field info structs with ODBC meta-data
CFieldInfo* m_rgFieldInfos; // Array of field info structs with MFC specific field data
CMapPtrToPtr m_mapFieldIndex; // Map of member address to field index
CMapPtrToPtr m_mapParamIndex; // Map of member address to field index
BOOL IsSQLUpdatable(LPCTSTR lpszSQL);
BOOL IsSelectQueryUpdatable(LPCTSTR lpszSQL);
static BOOL PASCAL IsJoin(LPCTSTR lpszJoinClause);
static LPCTSTR PASCAL FindSQLToken(LPCTSTR lpszSQL, LPCTSTR lpszSQLToken);
// RFX Operations on fields of CRecordset
UINT BindParams(HSTMT hstmt);
void RebindParams(HSTMT hstmt);
UINT BindFieldsToColumns();
void BindFieldsForUpdate();
void UnbindFieldsForUpdate();
void Fixups();
UINT AppendNames(CString* pstr, LPCTSTR szSeparator);
UINT AppendValues(HSTMT hstmt, CString* pstr, LPCTSTR szSeparator);
UINT AppendNamesValues(HSTMT hstmt, CString* pstr, LPCTSTR szSeparator);
void StoreFields();
void LoadFields();
void MarkForAddNew();
void MarkForUpdate();
void AllocDataCache();
void FreeDataCache();
#ifdef _DEBUG
void DumpFields(CDumpContext& dc) const;
#endif //_DEBUG
// RFX operation helper functions
virtual void ThrowDBException(RETCODE nRetCode, HSTMT hstmt = SQL_NULL_HSTMT);
int GetBoundFieldIndex(void* pv);
int GetBoundParamIndex(void* pv);
short GetFieldIndexByName(LPCTSTR lpszFieldName);
void AllocStatusArrays();
long* GetFieldLengthBuffer(DWORD nField, int nFieldType); // for fields & params
BYTE GetFieldStatus(DWORD nField);
void SetFieldStatus(DWORD nField, BYTE bFlags);
void ClearFieldStatus();
BOOL IsFieldStatusDirty(DWORD nField) const;
void SetDirtyFieldStatus(DWORD nField);
void ClearDirtyFieldStatus(DWORD nField);
BOOL IsFieldStatusNull(DWORD nField) const;
void SetNullFieldStatus(DWORD nField);
void ClearNullFieldStatus(DWORD nField);
BOOL IsParamStatusNull(DWORD nField) const;
void SetNullParamStatus(DWORD nField);
void ClearNullParamStatus(DWORD nField);
BOOL IsFieldNullable(DWORD nField) const;
void** m_pvFieldProxy;
void** m_pvParamProxy;
UINT m_nProxyFields;
UINT m_nProxyParams;
// GetFieldValue helpers
static short PASCAL GetDefaultFieldType(short nSQLType);
static void* PASCAL GetDataBuffer(CDBVariant& varValue, short nFieldType,
int* pnLen, short nSQLType, UDWORD nPrecision);
static int PASCAL GetTextLen(short nSQLType, UDWORD nPrecision);
static long PASCAL GetData(CDatabase* pdb, HSTMT hstmt, short nFieldIndex,
short nFieldType, LPVOID pvData, int nLen, short nSQLType);
static void PASCAL GetLongBinaryDataAndCleanup(CDatabase* pdb, HSTMT hstmt,
short nFieldIndex, long nActualSize, LPVOID* ppvData, int nLen,
CDBVariant& varValue, short nSQLType);
static void PASCAL GetLongCharDataAndCleanup(CDatabase* pdb, HSTMT hstmt,
short nFieldIndex, long nActualSize, LPVOID* ppvData, int nLen,
CString& strValue, short nSQLType);
protected:
UINT m_nOpenType;
UINT m_nDefaultType;
enum EditMode
{
noMode,
edit,
addnew
};
long m_lOpen;
UINT m_nEditMode;
BOOL m_bEOFSeen;
long m_lRecordCount;
long m_lCurrentRecord;
CString m_strCursorName;
// Perform operation based on m_nEditMode
BOOL UpdateInsertDelete();
BOOL m_nLockMode; // Control concurrency for Edit()
UDWORD m_dwDriverConcurrency; // driver supported concurrency types
UDWORD m_dwConcurrency; // requested concurrency type
UWORD* m_rgRowStatus; // row status used by SQLExtendedFetch and SQLSetPos
DWORD m_dwRowsFetched; // number of rows fetched by SQLExtendedFetch
HSTMT m_hstmtUpdate;
BOOL m_bRecordsetDb;
BOOL m_bBOF;
BOOL m_bEOF;
BOOL m_bUpdatable; // Is recordset updatable?
BOOL m_bAppendable;
CString m_strSQL; // SQL statement for recordset
CString m_strUpdateSQL; // SQL statement for updates
CString m_strTableName; // source table of recordset
BOOL m_bScrollable; // supports MovePrev
BOOL m_bDeleted;
int m_nFieldsBound;
BYTE* m_pbFieldFlags;
BYTE* m_pbParamFlags;
LONG* m_plParamLength;
DWORD m_dwInitialGetDataLen; // Initial GetFieldValue alloc size for long data
DWORD m_dwRowsetSize;
DWORD m_dwAllocatedRowsetSize;
protected:
CString m_strRequerySQL; // archive SQL string for use in Requery()
CString m_strRequeryFilter; // archive filter string for use in Requery()
CString m_strRequerySort; // archive sort string for use in Requery()
void SetState(int nOpenType, LPCTSTR lpszSQL, DWORD dwOptions);
BOOL AllocHstmt();
void BuildSQL(LPCTSTR lpszSQL);
void PrepareAndExecute();
void BuildSelectSQL();
void AppendFilterAndSortSQL();
BOOL IsRecordsetUpdatable();
void VerifyDriverBehavior();
DWORD VerifyCursorSupport();
void EnableBookmarks();
void SetUpdateMethod();
void SetConcurrencyAndCursorType(HSTMT hstmt, DWORD dwScrollOptions);
void AllocAndCacheFieldInfo();
void AllocRowset();
void FreeRowset();
void ExecuteSetPosUpdate();
void PrepareUpdateHstmt();
void BuildUpdateSQL();
void ExecuteUpdateSQL();
void SendLongBinaryData(HSTMT hstmt);
virtual long GetLBFetchSize(long lOldSize); // CLongBinary fetch chunking
virtual long GetLBReallocSize(long lOldSize); // CLongBinary realloc chunking
friend class CFieldExchange;
friend class CRecordView;
};
/////////////////////////////////////////////////////////////////////////////
// Info helper definitions
#define AFX_CURRENT_RECORD_UNDEFINED (-2)
#define AFX_CURRENT_RECORD_BOF (-1)
// For returning status for a recordset
struct CRecordsetStatus
{
long m_lCurrentRecord; // -2=Unknown,-1=BOF,0=1st record. . .
BOOL m_bRecordCountFinal;// Have we counted all records?
};
// Must maintian data binding info
struct CFieldInfo
{
// MFC specific info
void* m_pvDataCache;
long m_nLength;
int m_nDataType;
BYTE m_bStatus;
#ifdef _DEBUG
void* m_pvBindAddress;
#endif
};
struct CODBCFieldInfo
{
// meta data from ODBC
CString m_strName;
SWORD m_nSQLType;
UDWORD m_nPrecision;
SWORD m_nScale;
SWORD m_nNullability;
};
struct CODBCParamInfo
{
// meta data from ODBC
SWORD m_nSQLType;
UDWORD m_nPrecision;
SWORD m_nScale;
SWORD m_nNullability;
};
/////////////////////////////////////////////////////////////////////////////
// CDBVariant
#define DBVT_NULL 0
#define DBVT_BOOL 1
#define DBVT_UCHAR 2
#define DBVT_SHORT 3
#define DBVT_LONG 4
#define DBVT_SINGLE 5
#define DBVT_DOUBLE 6
#define DBVT_DATE 7
#define DBVT_STRING 8
#define DBVT_BINARY 9
class CDBVariant
{
// Constructor
public:
CDBVariant();
// Attributes
public:
DWORD m_dwType;
union
{
BOOL m_boolVal;
unsigned char m_chVal;
short m_iVal;
long m_lVal;
float m_fltVal;
double m_dblVal;
TIMESTAMP_STRUCT* m_pdate;
CString* m_pstring;
CLongBinary* m_pbinary;
};
// Operations
void Clear();
// Implementation
public:
virtual ~CDBVariant();
};
/////////////////////////////////////////////////////////////////////////////
// CRecordView - form for viewing data records
#ifdef _AFXDLL
class CRecordView : public CFormView
#else
class AFX_NOVTABLE CRecordView : public CFormView
#endif
{
DECLARE_DYNAMIC(CRecordView)
// Construction
protected: // must derive your own class
CRecordView(LPCTSTR lpszTemplateName);
CRecordView(UINT nIDTemplate);
// Attributes
public:
virtual CRecordset* OnGetRecordset() = 0;
BOOL IsOnLastRecord();
BOOL IsOnFirstRecord();
// Operations
public:
virtual BOOL OnMove(UINT nIDMoveCommand);
// Implementation
public:
virtual ~CRecordView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
virtual void OnInitialUpdate();
protected:
BOOL m_bOnFirstRecord;
BOOL m_bOnLastRecord;
//{{AFX_MSG(CRecordView)
afx_msg void OnUpdateRecordFirst(CCmdUI* pCmdUI);
afx_msg void OnUpdateRecordPrev(CCmdUI* pCmdUI);
afx_msg void OnUpdateRecordNext(CCmdUI* pCmdUI);
afx_msg void OnUpdateRecordLast(CCmdUI* pCmdUI);
//}}AFX_MSG
afx_msg void OnMove(int cx, int cy);
DECLARE_MESSAGE_MAP()
};
/////////////////////////////////////////////////////////////////////////////
// Inline function declarations
#ifdef _AFX_PACKING
#pragma pack(pop)
#endif
#ifdef _AFX_ENABLE_INLINES
#define _AFXDBCORE_INLINE AFX_INLINE
#define _AFXDBRFX_INLINE AFX_INLINE
#define _AFXDBVIEW_INLINE AFX_INLINE
#include <afxdb.inl>
#undef _AFXDBVIEW_INLINE
#undef _AFXDBCORE_INLINE
#undef _AFXDBRFX_INLINE
#endif
#undef AFX_DATA
#define AFX_DATA
#ifdef _AFX_MINREBUILD
#pragma component(minrebuild, on)
#endif
#ifndef _AFX_FULLTYPEINFO
#pragma component(mintypeinfo, off)
#endif
#endif //__AFXDB_H__
/////////////////////////////////////////////////////////////////////////////
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