include/wx/dbtable.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dbtable.h
   3 // Purpose:     Declaration of the wxDbTable class.
   4 // Author:      Doug Card
   5 // Modified by: George Tasker
   6 //              Bart Jourquin
   7 //              Mark Johnson
   8 // Created:     9.96
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) 1996 Remstar International, Inc.
  11 // Licence:     wxWindows licence
  12 ///////////////////////////////////////////////////////////////////////////////
  13
  14 /*
  15 // SYNOPSIS START
  16 // SYNOPSIS STOP
  17 */
  18
  19 #ifndef DBTABLE_DOT_H
  20 #define DBTABLE_DOT_H
  21
  22 #include "wx/version.h"
  23
  24 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  25   #pragma interface "dbtable.h"
  26 #endif
  27
  28 #include "wx/db.h"
  29
  30 #include "wx/variant.h"
  31 #include "wx/dbkeyg.h"
  32
  33 const int   wxDB_ROWID_LEN       = 24;  // 18 is the max, 24 is in case it gets larger
  34 const int   wxDB_DEFAULT_CURSOR  = 0;
  35 const bool  wxDB_QUERY_ONLY      = TRUE;
  36 const bool  wxDB_DISABLE_VIEW    = TRUE;
  37
  38 // Used to indicate end of a variable length list of
  39 // column numbers passed to member functions
  40 const int   wxDB_NO_MORE_COLUMN_NUMBERS = -1;
  41
  42 // The following class is used to define a column of a table.
  43 // The wxDbTable constructor will dynamically allocate as many of
  44 // these as there are columns in the table.  The class derived
  45 // from wxDbTable must initialize these column definitions in it's
  46 // constructor.  These column definitions provide inf. to the
  47 // wxDbTable class which allows it to create a table in the data
  48 // source, exchange data between the data source and the C++
  49 // object, and so on.
  50 class WXDLLIMPEXP_ODBC wxDbColDef
  51 {
  52 public:
  53     wxChar  ColName[DB_MAX_COLUMN_NAME_LEN+1];  // Column Name
  54     int     DbDataType;                         // Logical Data Type; e.g. DB_DATA_TYPE_INTEGER
  55     SWORD   SqlCtype;                           // C data type; e.g. SQL_C_LONG
  56     void   *PtrDataObj;                         // Address of the data object
  57     int     SzDataObj;                          // Size, in bytes, of the data object
  58     bool    KeyField;                           // TRUE if this column is part of the PRIMARY KEY to the table; Date fields should NOT be KeyFields.
  59     bool    Updateable;                         // Specifies whether this column is updateable
  60     bool    InsertAllowed;                      // Specifies whether this column should be included in an INSERT statement
  61     bool    DerivedCol;                         // Specifies whether this column is a derived value
  62     SDWORD  CbValue;                            // Internal use only!!!
  63     bool    Null;                               // NOT FULLY IMPLEMENTED - Allows NULL values in Inserts and Updates
  64
  65     wxDbColDef();
  66
  67     bool    Initialize();
  68 };  // wxDbColDef
  69
  70
  71 class WXDLLIMPEXP_ODBC wxDbColDataPtr
  72 {
  73 public:
  74     void    *PtrDataObj;
  75     int      SzDataObj;
  76     SWORD    SqlCtype;
  77 };  // wxDbColDataPtr
  78
  79
  80 // This structure is used when creating secondary indexes.
  81 class WXDLLIMPEXP_ODBC wxDbIdxDef
  82 {
  83 public:
  84     wxChar  ColName[DB_MAX_COLUMN_NAME_LEN+1];
  85     bool    Ascending;
  86 };  // wxDbIdxDef
  87
  88
  89 class WXDLLIMPEXP_ODBC wxDbTable
  90 {
  91 private:
  92     ULONG       tableID;  // Used for debugging.  This can help to match up mismatched constructors/destructors
  93
  94     // Private member variables
  95     UDWORD      cursorType;
  96     bool        insertable;
  97
  98     // Private member functions
  99     bool        initialize(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
 100                        const wxString &qryTblName, bool qryOnly, const wxString &tblPath);
 101     void        cleanup();
 102
 103     void        setCbValueForColumn(int columnIndex);
 104     bool        bindParams(bool forUpdate);  // called by the other 'bind' functions
 105     bool        bindInsertParams(void);
 106     bool        bindUpdateParams(void);
 107
 108     bool        bindCols(HSTMT cursor);
 109     bool        getRec(UWORD fetchType);
 110     bool        execDelete(const wxString &pSqlStmt);
 111     bool        execUpdate(const wxString &pSqlStmt);
 112     bool        query(int queryType, bool forUpdate, bool distinct, const wxString &pSqlStmt=wxEmptyString);
 113
 114 #if !wxODBC_BACKWARD_COMPATABILITY
 115 // these were public
 116     // Where, Order By and From clauses
 117     wxString    where;               // Standard SQL where clause, minus the word WHERE
 118     wxString    orderBy;             // Standard SQL order by clause, minus the ORDER BY
 119     wxString    from;                // Allows for joins in a wxDbTable::Query().  Format: ",tbl,tbl..."
 120
 121     // ODBC Handles
 122     HENV        henv;           // ODBC Environment handle
 123     HDBC        hdbc;           // ODBC DB Connection handle
 124     HSTMT       hstmt;          // ODBC Statement handle
 125     HSTMT      *hstmtDefault;   // Default cursor
 126     HSTMT       hstmtInsert;    // ODBC Statement handle used specifically for inserts
 127     HSTMT       hstmtDelete;    // ODBC Statement handle used specifically for deletes
 128     HSTMT       hstmtUpdate;    // ODBC Statement handle used specifically for updates
 129     HSTMT       hstmtInternal;  // ODBC Statement handle used internally only
 130     HSTMT      *hstmtCount;     // ODBC Statement handle used by Count() function (No binding of columns)
 131
 132     // Flags
 133     bool        selectForUpdate;
 134
 135     // Pointer to the database object this table belongs to
 136     wxDb       *pDb;
 137
 138     // Table Inf.
 139     wxString    tablePath;                                 // needed for dBase tables
 140     wxString    tableName;                                 // Table name
 141     wxString    queryTableName;                            // Query Table Name
 142     UWORD       noCols;                                    // # of columns in the table
 143     bool        queryOnly;                                 // Query Only, no inserts, updates or deletes
 144
 145     // Column Definitions
 146     wxDbColDef *colDefs;         // Array of wxDbColDef structures
 147 #endif
 148 public:
 149 #if wxODBC_BACKWARD_COMPATABILITY
 150     // Where, Order By and From clauses
 151     char       *where;          // Standard SQL where clause, minus the word WHERE
 152     char       *orderBy;        // Standard SQL order by clause, minus the ORDER BY
 153     char       *from;           // Allows for joins in a wxDbTable::Query().  Format: ",tbl,tbl..."
 154
 155     // ODBC Handles
 156     HENV        henv;           // ODBC Environment handle
 157     HDBC        hdbc;           // ODBC DB Connection handle
 158     HSTMT       hstmt;          // ODBC Statement handle
 159     HSTMT      *hstmtDefault;   // Default cursor
 160     HSTMT       hstmtInsert;    // ODBC Statement handle used specifically for inserts
 161     HSTMT       hstmtDelete;    // ODBC Statement handle used specifically for deletes
 162     HSTMT       hstmtUpdate;    // ODBC Statement handle used specifically for updates
 163     HSTMT       hstmtInternal;  // ODBC Statement handle used internally only
 164     HSTMT      *hstmtCount;     // ODBC Statement handle used by Count() function (No binding of columns)
 165
 166     // Flags
 167     bool        selectForUpdate;
 168
 169     // Pointer to the database object this table belongs to
 170     wxDb       *pDb;
 171
 172     // Table Inf.
 173     char        tablePath[wxDB_PATH_MAX];                  // needed for dBase tables
 174     char        tableName[DB_MAX_TABLE_NAME_LEN+1];        // Table name
 175     char        queryTableName[DB_MAX_TABLE_NAME_LEN+1];   // Query Table Name
 176     UWORD       noCols;                                    // # of columns in the table
 177     bool        queryOnly;                                 // Query Only, no inserts, updates or deletes
 178
 179     // Column Definitions
 180     wxDbColDef *colDefs;         // Array of wxDbColDef structures
 181 #endif
 182     // Public member functions
 183     wxDbTable(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
 184               const wxString &qryTblName=wxEmptyString, bool qryOnly = !wxDB_QUERY_ONLY,
 185               const wxString &tblPath=wxEmptyString);
 186
 187     // DEPRECATED
 188     wxDbTable(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
 189               const wxChar *qryTblName=wxEmptyString, bool qryOnly = !wxDB_QUERY_ONLY,
 190               const wxString &tblPath=wxEmptyString);
 191
 192     virtual ~wxDbTable();
 193
 194     bool            Open(bool checkPrivileges=FALSE, bool checkTableExists=TRUE);
 195     bool            CreateTable(bool attemptDrop=TRUE);
 196     bool            DropTable(void);
 197     bool            CreateIndex(const wxString &idxName, bool unique, UWORD noIdxCols,
 198                                 wxDbIdxDef *pIdxDefs, bool attemptDrop=TRUE);
 199     bool            DropIndex(const wxString &idxName);
 200
 201     // Accessors
 202
 203     // The member variables returned by these accessors are all
 204     // set when the wxDbTable instance is created and cannot be
 205     // changed, hence there is no corresponding SetXxxx function
 206     wxDb           *GetDb()              { return pDb; }
 207     const wxString &GetTableName()       { return tableName; }
 208     const wxString &GetQueryTableName()  { return queryTableName; }
 209     const wxString &GetTablePath()       { return tablePath; }
 210
 211     UWORD           GetNumberOfColumns() { return noCols; }  // number of "defined" columns for this wxDbTable instance
 212
 213     const wxString &GetFromClause()      { return from; }
 214     const wxString &GetOrderByClause()   { return orderBy; }
 215     const wxString &GetWhereClause()     { return where; }
 216
 217     bool            IsQueryOnly()        { return queryOnly; }
 218 #if wxODBC_BACKWARD_COMPATABILITY
 219     void            SetFromClause(const char *From) { from = (char *)From; }
 220     void            SetOrderByClause(const char *OrderBy) { orderBy = (char *)OrderBy; }
 221     void            SetWhereClause(const char *Where) { where = (char *)Where; }
 222 #else
 223     void            SetFromClause(const wxString &From) { from = From; }
 224     void            SetOrderByClause(const wxString &OrderBy) { orderBy = OrderBy; }
 225     bool            SetOrderByColNums(UWORD first, ...);
 226     void            SetWhereClause(const wxString &Where) { where = Where; }
 227     void            From(const wxString &From) { from = From; }
 228     void            OrderBy(const wxString &OrderBy) { orderBy = OrderBy; }
 229     void            Where(const wxString &Where) { where = Where; }
 230     const wxString &Where()   { return where; }
 231     const wxString &OrderBy() { return orderBy; }
 232     const wxString &From()    { return from; }
 233 #endif
 234     int             Insert(void);
 235     bool            Update(void);
 236     bool            Update(const wxString &pSqlStmt);
 237     bool            UpdateWhere(const wxString &pWhereClause);
 238     bool            Delete(void);
 239     bool            DeleteWhere(const wxString &pWhereClause);
 240     bool            DeleteMatching(void);
 241     virtual bool    Query(bool forUpdate = FALSE, bool distinct = FALSE);
 242     bool            QueryBySqlStmt(const wxString &pSqlStmt);
 243     bool            QueryMatching(bool forUpdate = FALSE, bool distinct = FALSE);
 244     bool            QueryOnKeyFields(bool forUpdate = FALSE, bool distinct = FALSE);
 245     bool            Refresh(void);
 246     bool            GetNext(void)   { return(getRec(SQL_FETCH_NEXT));  }
 247     bool            operator++(int) { return(getRec(SQL_FETCH_NEXT));  }
 248
 249     /***** These four functions only work with wxDb instances that are defined  *****
 250      ***** as not being FwdOnlyCursors                                          *****/
 251     bool            GetPrev(void);
 252     bool            operator--(int);
 253     bool            GetFirst(void);
 254     bool            GetLast(void);
 255
 256     bool            IsCursorClosedOnCommit(void);
 257     UWORD           GetRowNum(void);
 258
 259     void            BuildSelectStmt(wxString &pSqlStmt, int typeOfSelect, bool distinct);
 260     void            BuildSelectStmt(wxChar *pSqlStmt, int typeOfSelect, bool distinct);
 261
 262     void            BuildDeleteStmt(wxString &pSqlStmt, int typeOfDel, const wxString &pWhereClause=wxEmptyString);
 263     void            BuildDeleteStmt(wxChar *pSqlStmt, int typeOfDel, const wxString &pWhereClause=wxEmptyString);
 264
 265     void            BuildUpdateStmt(wxString &pSqlStmt, int typeOfUpd, const wxString &pWhereClause=wxEmptyString);
 266     void            BuildUpdateStmt(wxChar *pSqlStmt, int typeOfUpd, const wxString &pWhereClause=wxEmptyString);
 267
 268     void            BuildWhereClause(wxString &pWhereClause, int typeOfWhere, const wxString &qualTableName=wxEmptyString, bool useLikeComparison=FALSE);
 269     void            BuildWhereClause(wxChar *pWhereClause, int typeOfWhere, const wxString &qualTableName=wxEmptyString, bool useLikeComparison=FALSE);
 270
 271 #if wxODBC_BACKWARD_COMPATABILITY
 272 // The following member functions are deprecated.  You should use the BuildXxxxxStmt functions (above)
 273     void            GetSelectStmt(char *pSqlStmt, int typeOfSelect, bool distinct)
 274                            { BuildSelectStmt(pSqlStmt,typeOfSelect,distinct); }
 275     void            GetDeleteStmt(char *pSqlStmt, int typeOfDel, const char *pWhereClause = NULL)
 276                            { BuildDeleteStmt(pSqlStmt,typeOfDel,pWhereClause); }
 277     void            GetUpdateStmt(char *pSqlStmt, int typeOfUpd, const char *pWhereClause = NULL)
 278                            { BuildUpdateStmt(pSqlStmt,typeOfUpd,pWhereClause); }
 279     void            GetWhereClause(char *pWhereClause, int typeOfWhere,
 280                                    const char *qualTableName = NULL, bool useLikeComparison=FALSE)
 281                            { BuildWhereClause(pWhereClause,typeOfWhere,qualTableName,useLikeComparison); }
 282 #endif
 283     bool            CanSelectForUpdate(void);
 284     bool            CanUpdByROWID(void);
 285     void            ClearMemberVar(UWORD colNo, bool setToNull=FALSE);
 286     void            ClearMemberVars(bool setToNull=FALSE);
 287     bool            SetQueryTimeout(UDWORD nSeconds);
 288
 289     wxDbColDef     *GetColDefs() { return colDefs; }
 290     void            SetColDefs(UWORD index, const wxString &fieldName, int dataType,
 291                                void *pData, SWORD cType,
 292                                int size, bool keyField = FALSE, bool upd = TRUE,
 293                                bool insAllow = TRUE, bool derivedCol = FALSE);
 294     wxDbColDataPtr *SetColDefs(wxDbColInf *colInfs, UWORD numCols);
 295
 296     bool            CloseCursor(HSTMT cursor);
 297     bool            DeleteCursor(HSTMT *hstmtDel);
 298     void            SetCursor(HSTMT *hstmtActivate = (void **) wxDB_DEFAULT_CURSOR);
 299     HSTMT           GetCursor(void) { return(hstmt); }
 300     HSTMT          *GetNewCursor(bool setCursor = FALSE, bool bindColumns = TRUE);
 301 #if wxODBC_BACKWARD_COMPATABILITY
 302 // The following member function is deprecated.  You should use the GetNewCursor
 303     HSTMT          *NewCursor(bool setCursor = FALSE, bool bindColumns = TRUE) {  return GetNewCursor(setCursor,bindColumns); }
 304 #endif
 305
 306     ULONG           Count(const wxString &args=_T("*"));
 307     int             DB_STATUS(void) { return(pDb->DB_STATUS); }
 308
 309     bool            IsColNull(UWORD colNo) const;
 310     bool            SetColNull(UWORD colNo, bool set=TRUE);
 311     bool            SetColNull(const wxString &colName, bool set=TRUE);
 312 #if wxODBC_BACKWARD_COMPATABILITY
 313 // The following member functions are deprecated.  You should use the SetColNull()
 314     bool            SetNull(int colNo, bool set=TRUE) { return (SetNull(colNo,set)); }
 315     bool            SetNull(const char *colName, bool set=TRUE) { return (SetNull(colName,set)); }
 316 #endif
 317 #ifdef __WXDEBUG__
 318     ULONG           GetTableID() { return tableID; }
 319 #endif
 320
 321 //TODO: Need to Document
 322     typedef     enum  { WX_ROW_MODE_QUERY , WX_ROW_MODE_INDIVIDUAL } rowmode_t;
 323     virtual     void         SetRowMode(const rowmode_t rowmode);
 324     virtual     wxVariant    GetCol(const int colNo) const ;
 325     virtual     void         SetCol(const int colNo, const wxVariant value);
 326     virtual     GenericKey   GetKey(void);
 327     virtual     void         SetKey(const GenericKey &key);
 328
 329     private:
 330         HSTMT      *m_hstmtGridQuery;
 331         rowmode_t   m_rowmode;
 332         size_t      m_keysize;
 333
 334 //      typedef enum {unmodified=0, UpdatePending, InsertPending } recStatus;
 335
 336 //      recStatus  get_ModifiedStatus() { return m_recstatus; }
 337
 338 //      void modify() {
 339 //          if (m_recstatus==unmodified)
 340 //              m_recstatus=UpdatePending;
 341 //      }
 342 //  protected:
 343 //      void insertify() {m_recstatus=InsertPending; }
 344 //      void unmodify() {m_recstatus=unmodified; }
 345 //      recStatus m_recstatus;
 346 //TODO: Need to Document
 347 };  // wxDbTable
 348
 349
 350 // Change this to 0 to remove use of all deprecated functions
 351 #if wxODBC_BACKWARD_COMPATABILITY
 352 //#################################################################################
 353 //############### DEPRECATED functions for backward compatability #################
 354 //#################################################################################
 355
 356 // Backward compability.  These will eventually go away
 357 typedef wxDbTable       wxTable;
 358 typedef wxDbIdxDef      wxIdxDef;
 359 typedef wxDbIdxDef      CidxDef;
 360 typedef wxDbColDef      wxColDef;
 361 typedef wxDbColDef      CcolDef;
 362 typedef wxDbColDataPtr  wxColDataPtr;
 363 typedef wxDbColDataPtr  CcolDataPtr;
 364
 365 const int   ROWID           = wxDB_ROWID_LEN;
 366 const int   DEFAULT_CURSOR  = wxDB_DEFAULT_CURSOR;
 367 const bool  QUERY_ONLY      = wxDB_QUERY_ONLY;
 368 const bool  DISABLE_VIEW    = wxDB_DISABLE_VIEW;
 369 #endif
 370
 371 #endif