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