include/wx/db.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/db.h
   3 // Purpose:     Header file wxDb class.  The wxDb class represents a connection
   4 //              to an ODBC data source.  The wxDb class allows operations on the data
   5 //              source such as opening and closing the data source.
   6 // Author:      Doug Card
   7 // Modified by: George Tasker
   8 //              Bart Jourquin
   9 //              Mark Johnson, wxWindows@mj10777.de
  10 // Mods:        Dec, 1998:
  11 //                -Added support for SQL statement logging and database cataloging
  12 //                     April, 1999
  13 //                -Added QUERY_ONLY mode support to reduce default number of cursors
  14 //                -Added additional SQL logging code
  15 //                -Added DEBUG-ONLY tracking of Ctable objects to detect orphaned DB connections
  16 //                -Set ODBC option to only read committed writes to the DB so all
  17 //                     databases operate the same in that respect
  18 //
  19 // Created:     9.96
  20 // RCS-ID:      $Id$
  21 // Copyright:   (c) 1996 Remstar International, Inc.
  22 // Licence:     wxWindows licence, plus:
  23 // Notice:      This class library and its intellectual design are free of charge for use,
  24 //              modification, enhancement, debugging under the following conditions:
  25 //              1) These classes may only be used as part of the implementation of a
  26 //                 wxWindows-based application
  27 //              2) All enhancements and bug fixes are to be submitted back to the wxWindows
  28 //                 user groups free of all charges for use with the wxWindows library.
  29 //              3) These classes may not be distributed as part of any other class library,
  30 //                 DLL, text (written or electronic), other than a complete distribution of
  31 //                 the wxWindows GUI development toolkit.
  32 //
  33 ///////////////////////////////////////////////////////////////////////////////
  34
  35 #ifndef _WX_DB_H_
  36 #define _WX_DB_H_
  37
  38
  39 // BJO 20000503: introduce new GetColumns members which are more database independant and
  40 //               return columns in the order they were created
  41 #define OLD_GETCOLUMNS 1
  42 #define EXPERIMENTAL_WXDB_FUNCTIONS 1
  43
  44 #include "wx/version.h"
  45
  46 #if defined(__GNUG__) && !defined(__APPLE__)
  47     #pragma interface "db.h"
  48 #endif
  49
  50 #include "wx/setup.h"
  51
  52 #include "wx/defs.h"
  53 #include "wx/string.h"
  54
  55 #if defined(__VISUALC__)
  56     // we need to include standard Windows headers but we can't include
  57     // <windows.h> directly when using MFC because it includes it itself in a
  58     // different manner
  59     #if wxUSE_MFC
  60         #include <afxwin.h>
  61     #else // !wxUSE_MFC
  62         #ifndef STRICT
  63             #define STRICT 1
  64         #endif
  65
  66         #include <windows.h>
  67         #include "wx/msw/winundef.h"
  68     #endif // wxUSE_MFC/!wxUSE_MFC
  69
  70     // If you use the wxDbCreateDataSource() function with MSW/VC6,
  71     // you cannot use the iODBC headers, you must use the VC headers,
  72     // plus the odbcinst.h header - gt Nov 2 2000
  73     //
  74     // Must add "odbccp32.lib" in \wx2\wxWindows\src\makevc.env to the WINLIBS= line
  75     //
  76     #include "sql.h"
  77     #include "sqlext.h"
  78     #include "odbcinst.h"
  79 #else
  80     #if defined(__WINDOWS__) && defined(HAVE_W32API_H)
  81         #include <windows.h>
  82         #include "wx/msw/winundef.h"
  83     #endif
  84     // Use the ones from the library
  85     extern "C" {
  86         #include <sql.h>
  87         #include <sqlext.h>
  88     }
  89 #endif
  90
  91
  92 typedef float SFLOAT;
  93 typedef double SDOUBLE;
  94 typedef unsigned int UINT;
  95 #define ULONG UDWORD
  96
  97 #ifndef wxODBC_FWD_ONLY_CURSORS
  98 #define wxODBC_FWD_ONLY_CURSORS 1
  99 #endif
 100
 101 enum enumDummy {enumDum1};
 102
 103 #ifndef SQL_C_BOOLEAN
 104 #define SQL_C_BOOLEAN(datatype) (sizeof(datatype) == 1 ? SQL_C_UTINYINT : (sizeof(datatype) == 2 ? SQL_C_USHORT : SQL_C_ULONG))
 105 //#  define SQL_C_BOOLEAN (sizeof(int) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
 106 #endif
 107
 108 #ifndef SQL_C_ENUM
 109 #define SQL_C_ENUM (sizeof(enumDummy) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
 110 #endif
 111
 112 #ifndef SQL_C_BLOB
 113     #ifdef SQL_LONGVARBINARY
 114         #define SQL_C_BLOB SQL_LONGVARBINARY
 115     #elif SQL_VARBINARY
 116         #define SQL_C_BLOB SQL_VARBINARY
 117     #endif
 118 #endif
 119 /*
 120 #ifndef TRUE
 121 #define TRUE true
 122 #endif
 123
 124 #ifndef FALSE
 125 #define FALSE false
 126 #endif
 127 */
 128 const int wxDB_PATH_MAX                 = 254;
 129
 130 WXDLLIMPEXP_DATA_ODBC(extern wxChar const *) SQL_LOG_FILENAME;
 131 WXDLLIMPEXP_DATA_ODBC(extern wxChar const *) SQL_CATALOG_FILENAME;
 132
 133 // Database Globals
 134 const int DB_TYPE_NAME_LEN            = 40;
 135 const int DB_MAX_STATEMENT_LEN        = 4096;
 136 const int DB_MAX_WHERE_CLAUSE_LEN     = 2048;
 137 const int DB_MAX_ERROR_MSG_LEN        = 512;
 138 const int DB_MAX_ERROR_HISTORY        = 5;
 139 const int DB_MAX_TABLE_NAME_LEN       = 128;
 140 const int DB_MAX_COLUMN_NAME_LEN      = 128;
 141
 142 const int DB_DATA_TYPE_VARCHAR        = 1;
 143 const int DB_DATA_TYPE_INTEGER        = 2;
 144 const int DB_DATA_TYPE_FLOAT          = 3;
 145 const int DB_DATA_TYPE_DATE           = 4;
 146 const int DB_DATA_TYPE_BLOB           = 5;
 147
 148 const int DB_SELECT_KEYFIELDS         = 1;
 149 const int DB_SELECT_WHERE             = 2;
 150 const int DB_SELECT_MATCHING          = 3;
 151 const int DB_SELECT_STATEMENT         = 4;
 152
 153 const int DB_UPD_KEYFIELDS            = 1;
 154 const int DB_UPD_WHERE                = 2;
 155
 156 const int DB_DEL_KEYFIELDS            = 1;
 157 const int DB_DEL_WHERE                = 2;
 158 const int DB_DEL_MATCHING             = 3;
 159
 160 const int DB_WHERE_KEYFIELDS          = 1;
 161 const int DB_WHERE_MATCHING           = 2;
 162
 163 const int DB_GRANT_SELECT             = 1;
 164 const int DB_GRANT_INSERT             = 2;
 165 const int DB_GRANT_UPDATE             = 4;
 166 const int DB_GRANT_DELETE             = 8;
 167 const int DB_GRANT_ALL                = DB_GRANT_SELECT | DB_GRANT_INSERT | DB_GRANT_UPDATE | DB_GRANT_DELETE;
 168
 169 // ODBC Error codes (derived from ODBC SqlState codes)
 170 enum wxODBC_ERRORS
 171 {
 172     DB_FAILURE                        = 0,
 173     DB_SUCCESS                        = 1,
 174     DB_ERR_NOT_IN_USE,
 175     DB_ERR_GENERAL_WARNING,                            // SqlState = '01000'
 176     DB_ERR_DISCONNECT_ERROR,                           // SqlState = '01002'
 177     DB_ERR_DATA_TRUNCATED,                             // SqlState = '01004'
 178     DB_ERR_PRIV_NOT_REVOKED,                           // SqlState = '01006'
 179     DB_ERR_INVALID_CONN_STR_ATTR,                      // SqlState = '01S00'
 180     DB_ERR_ERROR_IN_ROW,                               // SqlState = '01S01'
 181     DB_ERR_OPTION_VALUE_CHANGED,                       // SqlState = '01S02'
 182     DB_ERR_NO_ROWS_UPD_OR_DEL,                         // SqlState = '01S03'
 183     DB_ERR_MULTI_ROWS_UPD_OR_DEL,                      // SqlState = '01S04'
 184     DB_ERR_WRONG_NO_OF_PARAMS,                         // SqlState = '07001'
 185     DB_ERR_DATA_TYPE_ATTR_VIOL,                        // SqlState = '07006'
 186     DB_ERR_UNABLE_TO_CONNECT,                          // SqlState = '08001'
 187     DB_ERR_CONNECTION_IN_USE,                          // SqlState = '08002'
 188     DB_ERR_CONNECTION_NOT_OPEN,                        // SqlState = '08003'
 189     DB_ERR_REJECTED_CONNECTION,                        // SqlState = '08004'
 190     DB_ERR_CONN_FAIL_IN_TRANS,                         // SqlState = '08007'
 191     DB_ERR_COMM_LINK_FAILURE,                          // SqlState = '08S01'
 192     DB_ERR_INSERT_VALUE_LIST_MISMATCH,                 // SqlState = '21S01'
 193     DB_ERR_DERIVED_TABLE_MISMATCH,                     // SqlState = '21S02'
 194     DB_ERR_STRING_RIGHT_TRUNC,                         // SqlState = '22001'
 195     DB_ERR_NUMERIC_VALUE_OUT_OF_RNG,                   // SqlState = '22003'
 196     DB_ERR_ERROR_IN_ASSIGNMENT,                        // SqlState = '22005'
 197     DB_ERR_DATETIME_FLD_OVERFLOW,                      // SqlState = '22008'
 198     DB_ERR_DIVIDE_BY_ZERO,                             // SqlState = '22012'
 199     DB_ERR_STR_DATA_LENGTH_MISMATCH,                   // SqlState = '22026'
 200     DB_ERR_INTEGRITY_CONSTRAINT_VIOL,                  // SqlState = '23000'
 201     DB_ERR_INVALID_CURSOR_STATE,                       // SqlState = '24000'
 202     DB_ERR_INVALID_TRANS_STATE,                        // SqlState = '25000'
 203     DB_ERR_INVALID_AUTH_SPEC,                          // SqlState = '28000'
 204     DB_ERR_INVALID_CURSOR_NAME,                        // SqlState = '34000'
 205     DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL,                // SqlState = '37000'
 206     DB_ERR_DUPLICATE_CURSOR_NAME,                      // SqlState = '3C000'
 207     DB_ERR_SERIALIZATION_FAILURE,                      // SqlState = '40001'
 208     DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL2,               // SqlState = '42000'
 209     DB_ERR_OPERATION_ABORTED,                          // SqlState = '70100'
 210     DB_ERR_UNSUPPORTED_FUNCTION,                       // SqlState = 'IM001'
 211     DB_ERR_NO_DATA_SOURCE,                             // SqlState = 'IM002'
 212     DB_ERR_DRIVER_LOAD_ERROR,                          // SqlState = 'IM003'
 213     DB_ERR_SQLALLOCENV_FAILED,                         // SqlState = 'IM004'
 214     DB_ERR_SQLALLOCCONNECT_FAILED,                     // SqlState = 'IM005'
 215     DB_ERR_SQLSETCONNECTOPTION_FAILED,                 // SqlState = 'IM006'
 216     DB_ERR_NO_DATA_SOURCE_DLG_PROHIB,                  // SqlState = 'IM007'
 217     DB_ERR_DIALOG_FAILED,                              // SqlState = 'IM008'
 218     DB_ERR_UNABLE_TO_LOAD_TRANSLATION_DLL,             // SqlState = 'IM009'
 219     DB_ERR_DATA_SOURCE_NAME_TOO_LONG,                  // SqlState = 'IM010'
 220     DB_ERR_DRIVER_NAME_TOO_LONG,                       // SqlState = 'IM011'
 221     DB_ERR_DRIVER_KEYWORD_SYNTAX_ERROR,                // SqlState = 'IM012'
 222     DB_ERR_TRACE_FILE_ERROR,                           // SqlState = 'IM013'
 223     DB_ERR_TABLE_OR_VIEW_ALREADY_EXISTS,               // SqlState = 'S0001'
 224     DB_ERR_TABLE_NOT_FOUND,                            // SqlState = 'S0002'
 225     DB_ERR_INDEX_ALREADY_EXISTS,                       // SqlState = 'S0011'
 226     DB_ERR_INDEX_NOT_FOUND,                            // SqlState = 'S0012'
 227     DB_ERR_COLUMN_ALREADY_EXISTS,                      // SqlState = 'S0021'
 228     DB_ERR_COLUMN_NOT_FOUND,                           // SqlState = 'S0022'
 229     DB_ERR_NO_DEFAULT_FOR_COLUMN,                      // SqlState = 'S0023'
 230     DB_ERR_GENERAL_ERROR,                              // SqlState = 'S1000'
 231     DB_ERR_MEMORY_ALLOCATION_FAILURE,                  // SqlState = 'S1001'
 232     DB_ERR_INVALID_COLUMN_NUMBER,                      // SqlState = 'S1002'
 233     DB_ERR_PROGRAM_TYPE_OUT_OF_RANGE,                  // SqlState = 'S1003'
 234     DB_ERR_SQL_DATA_TYPE_OUT_OF_RANGE,                 // SqlState = 'S1004'
 235     DB_ERR_OPERATION_CANCELLED,                        // SqlState = 'S1008'
 236     DB_ERR_INVALID_ARGUMENT_VALUE,                     // SqlState = 'S1009'
 237     DB_ERR_FUNCTION_SEQUENCE_ERROR,                    // SqlState = 'S1010'
 238     DB_ERR_OPERATION_INVALID_AT_THIS_TIME,             // SqlState = 'S1011'
 239     DB_ERR_INVALID_TRANS_OPERATION_CODE,               // SqlState = 'S1012'
 240     DB_ERR_NO_CURSOR_NAME_AVAIL,                       // SqlState = 'S1015'
 241     DB_ERR_INVALID_STR_OR_BUF_LEN,                     // SqlState = 'S1090'
 242     DB_ERR_DESCRIPTOR_TYPE_OUT_OF_RANGE,               // SqlState = 'S1091'
 243     DB_ERR_OPTION_TYPE_OUT_OF_RANGE,                   // SqlState = 'S1092'
 244     DB_ERR_INVALID_PARAM_NO,                           // SqlState = 'S1093'
 245     DB_ERR_INVALID_SCALE_VALUE,                        // SqlState = 'S1094'
 246     DB_ERR_FUNCTION_TYPE_OUT_OF_RANGE,                 // SqlState = 'S1095'
 247     DB_ERR_INF_TYPE_OUT_OF_RANGE,                      // SqlState = 'S1096'
 248     DB_ERR_COLUMN_TYPE_OUT_OF_RANGE,                   // SqlState = 'S1097'
 249     DB_ERR_SCOPE_TYPE_OUT_OF_RANGE,                    // SqlState = 'S1098'
 250     DB_ERR_NULLABLE_TYPE_OUT_OF_RANGE,                 // SqlState = 'S1099'
 251     DB_ERR_UNIQUENESS_OPTION_TYPE_OUT_OF_RANGE,        // SqlState = 'S1100'
 252     DB_ERR_ACCURACY_OPTION_TYPE_OUT_OF_RANGE,          // SqlState = 'S1101'
 253     DB_ERR_DIRECTION_OPTION_OUT_OF_RANGE,              // SqlState = 'S1103'
 254     DB_ERR_INVALID_PRECISION_VALUE,                    // SqlState = 'S1104'
 255     DB_ERR_INVALID_PARAM_TYPE,                         // SqlState = 'S1105'
 256     DB_ERR_FETCH_TYPE_OUT_OF_RANGE,                    // SqlState = 'S1106'
 257     DB_ERR_ROW_VALUE_OUT_OF_RANGE,                     // SqlState = 'S1107'
 258     DB_ERR_CONCURRENCY_OPTION_OUT_OF_RANGE,            // SqlState = 'S1108'
 259     DB_ERR_INVALID_CURSOR_POSITION,                    // SqlState = 'S1109'
 260     DB_ERR_INVALID_DRIVER_COMPLETION,                  // SqlState = 'S1110'
 261     DB_ERR_INVALID_BOOKMARK_VALUE,                     // SqlState = 'S1111'
 262     DB_ERR_DRIVER_NOT_CAPABLE,                         // SqlState = 'S1C00'
 263     DB_ERR_TIMEOUT_EXPIRED                             // SqlState = 'S1T00'
 264 };
 265
 266 #ifndef MAXNAME
 267 #define MAXNAME         31
 268 #endif
 269
 270 #ifndef SQL_MAX_AUTHSTR_LEN
 271 // There does not seem to be a standard for this, so I am
 272 // defaulting to the value that MS uses
 273 #define SQL_MAX_AUTHSTR_LEN MAXNAME
 274 #endif
 275
 276 class WXDLLIMPEXP_ODBC wxDbConnectInf
 277 {
 278     private:
 279         bool freeHenvOnDestroy;
 280
 281     public:
 282         HENV Henv;
 283         wxChar Dsn[SQL_MAX_DSN_LENGTH+1];                  // Data Source Name
 284         wxChar Uid[SQL_MAX_USER_NAME_LEN+1];               // User ID
 285         wxChar AuthStr[SQL_MAX_AUTHSTR_LEN+1];             // Authorization string (password)
 286
 287         wxString Description;                              // Not sure what the max length is
 288         wxString FileType;                                 // Not sure what the max length is
 289
 290         // Optionals needed for some databases like dBase
 291         wxString DefaultDir;                               // Directory that db file resides in
 292
 293     public:
 294
 295         wxDbConnectInf();
 296         wxDbConnectInf(HENV henv, const wxString &dsn, const wxString &userID=wxEmptyString,
 297                        const wxString &password=wxEmptyString, const wxString &defaultDir=wxEmptyString,
 298                        const wxString &description=wxEmptyString, const wxString &fileType=wxEmptyString);
 299
 300         ~wxDbConnectInf();
 301
 302         bool             Initialize();
 303
 304         bool             AllocHenv();
 305         void             FreeHenv();
 306
 307         // Accessors
 308         const HENV       &GetHenv()          { return Henv; };
 309
 310         const wxChar    *GetDsn()           { return Dsn; };
 311
 312         const wxChar    *GetUid()           { return Uid; };
 313         const wxChar    *GetUserID()        { return Uid; };
 314
 315         const wxChar    *GetAuthStr()       { return AuthStr; };
 316         const wxChar    *GetPassword()      { return AuthStr; };
 317
 318         const wxChar    *GetDescription()   { return Description; };
 319         const wxChar    *GetFileType()      { return FileType; };
 320         const wxChar    *GetDefaultDir()    { return DefaultDir; };
 321
 322         void             SetHenv(const HENV henv)               { Henv = henv; };
 323
 324         void             SetDsn(const wxString &dsn);
 325
 326         void             SetUserID(const wxString &userID);
 327         void             SetUid(const wxString &uid)            { SetUserID(uid); };
 328
 329         void             SetPassword(const wxString &password);
 330         void             SetAuthStr(const wxString &authstr)    { SetPassword(authstr); };
 331
 332         void             SetDescription(const wxString &desc)   { Description   = desc;     };
 333         void             SetFileType(const wxString &fileType)  { FileType      = fileType; };
 334         void             SetDefaultDir(const wxString &defDir)  { DefaultDir    = defDir;   };
 335 };  // class wxDbConnectInf
 336
 337
 338 struct WXDLLIMPEXP_ODBC wxDbSqlTypeInfo
 339 {
 340     wxString    TypeName;
 341     SWORD       FsqlType;
 342     long        Precision;
 343     short       CaseSensitive;
 344 //    short     MinimumScale;
 345     short       MaximumScale;
 346 };
 347
 348
 349 class WXDLLIMPEXP_ODBC wxDbColFor
 350 {
 351 public:
 352     wxString       s_Field;              // Formated String for Output
 353     wxString       s_Format[7];          // Formated Objects - TIMESTAMP has the biggest (7)
 354     wxString       s_Amount[7];          // Formated Objects - amount of things that can be formatted
 355     int            i_Amount[7];          // Formated Objects - TT MM YYYY HH MM SS m
 356     int            i_Nation;             // 0 = timestamp , 1=EU, 2=UK, 3=International, 4=US
 357     int            i_dbDataType;         // conversion of the 'sqlDataType' to the generic data type used by these classes
 358     SWORD          i_sqlDataType;
 359
 360     wxDbColFor();
 361     ~wxDbColFor();
 362
 363     void           Initialize();
 364     int            Format(int Nation, int dbDataType, SWORD sqlDataType, short columnSize, short decimalDigits);
 365 };
 366
 367
 368 class WXDLLIMPEXP_ODBC wxDbColInf
 369 {
 370 public:
 371     wxChar       catalog[128+1];
 372     wxChar       schema[128+1];
 373     wxChar       tableName[DB_MAX_TABLE_NAME_LEN+1];
 374     wxChar       colName[DB_MAX_COLUMN_NAME_LEN+1];
 375     SWORD        sqlDataType;
 376     wxChar       typeName[128+1];
 377     SWORD        columnSize;
 378     SWORD        bufferLength;
 379     short        decimalDigits;
 380     short        numPrecRadix;
 381     short        nullable;
 382     wxChar       remarks[254+1];
 383     int          dbDataType;  // conversion of the 'sqlDataType' to the generic data type used by these classes
 384  // mj10777.19991224 : new
 385     int          PkCol;       // Primary key column       0=No; 1= First Key, 2 = Second Key etc.
 386     wxChar       PkTableName[DB_MAX_TABLE_NAME_LEN+1]; // Tables that use this PKey as a FKey
 387     int          FkCol;       // Foreign key column       0=No; 1= First Key, 2 = Second Key etc.
 388     wxChar       FkTableName[DB_MAX_TABLE_NAME_LEN+1]; // Foreign key table name
 389     wxDbColFor  *pColFor;                              // How should this columns be formatted
 390
 391     wxDbColInf();
 392     ~wxDbColInf();
 393
 394     bool Initialize();
 395 };
 396
 397
 398 class WXDLLIMPEXP_ODBC wxDbTableInf        // Description of a Table
 399 {
 400 public:
 401     wxChar      tableName[DB_MAX_TABLE_NAME_LEN+1];
 402     wxChar      tableType[254+1];           // "TABLE" or "SYSTEM TABLE" etc.
 403     wxChar      tableRemarks[254+1];
 404     UWORD       numCols;                    // How many Columns does this Table have: GetColumnCount(..);
 405     wxDbColInf *pColInf;                    // pColInf = NULL ; User can later call GetColumns(..);
 406
 407     wxDbTableInf();
 408     ~wxDbTableInf();
 409
 410     bool             Initialize();
 411 };
 412
 413
 414 class WXDLLIMPEXP_ODBC wxDbInf     // Description of a Database
 415 {
 416 public:
 417     wxChar        catalog[128+1];
 418     wxChar        schema[128+1];
 419     int           numTables;           // How many tables does this database have
 420     wxDbTableInf *pTableInf;           // pTableInf = new wxDbTableInf[numTables];
 421
 422     wxDbInf();
 423     ~wxDbInf();
 424
 425     bool          Initialize();
 426 };
 427
 428
 429 enum wxDbSqlLogState
 430 {
 431     sqlLogOFF,
 432     sqlLogON
 433 };
 434
 435 // These are the databases currently tested and working with these classes
 436 // See the comments in wxDb::Dbms() for exceptions/issues with
 437 // each of these database engines
 438 enum wxDBMS
 439 {
 440     dbmsUNIDENTIFIED,
 441     dbmsORACLE,
 442     dbmsSYBASE_ASA,        // Adaptive Server Anywhere
 443     dbmsSYBASE_ASE,        // Adaptive Server Enterprise
 444     dbmsMS_SQL_SERVER,
 445     dbmsMY_SQL,
 446     dbmsPOSTGRES,
 447     dbmsACCESS,
 448     dbmsDBASE,
 449     dbmsINFORMIX,
 450     dbmsVIRTUOSO,
 451     dbmsDB2,
 452     dbmsINTERBASE,
 453     dbmsPERVASIVE_SQL,
 454     dbmsXBASE_SEQUITER
 455 };
 456
 457
 458 // The wxDb::errorList is copied to this variable when the wxDb object
 459 // is closed.  This way, the error list is still available after the
 460 // database object is closed.  This is necessary if the database
 461 // connection fails so the calling application can show the operator
 462 // why the connection failed.  Note: as each wxDb object is closed, it
 463 // will overwrite the errors of the previously destroyed wxDb object in
 464 // this variable.
 465
 466 WXDLLIMPEXP_DATA_BASE(extern wxChar)
 467     DBerrorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
 468
 469
 470 class WXDLLIMPEXP_ODBC wxDb
 471 {
 472 private:
 473     bool             dbIsOpen;
 474     bool             dbIsCached;      // Was connection created by caching functions
 475     wxString         dsn;             // Data source name
 476     wxString         uid;             // User ID
 477     wxString         authStr;         // Authorization string (password)
 478     FILE            *fpSqlLog;        // Sql Log file pointer
 479     wxDbSqlLogState  sqlLogState;     // On or Off
 480     bool             fwdOnlyCursors;
 481     wxDBMS           dbmsType;        // Type of datasource - i.e. Oracle, dBase, SQLServer, etc
 482
 483     // Private member functions
 484     bool             getDbInfo(void);
 485     bool             getDataTypeInfo(SWORD fSqlType, wxDbSqlTypeInfo &structSQLTypeInfo);
 486     bool             setConnectionOptions(void);
 487     void             logError(const wxString &errMsg, const wxString &SQLState);
 488     const wxChar    *convertUserID(const wxChar *userID, wxString &UserID);
 489     void             initialize();
 490
 491 #if !wxODBC_BACKWARD_COMPATABILITY
 492     // ODBC handles
 493     HENV  henv;        // ODBC Environment handle
 494     HDBC  hdbc;        // ODBC DB Connection handle
 495     HSTMT hstmt;       // ODBC Statement handle
 496
 497     //Error reporting mode
 498     bool silent;
 499
 500     // Number of Ctable objects connected to this db object.  FOR INTERNAL USE ONLY!!!
 501     unsigned int nTables;
 502
 503     // Information about logical data types VARCHAR, INTEGER, FLOAT and DATE.
 504      //
 505     // This information is obtained from the ODBC driver by use of the
 506     // SQLGetTypeInfo() function.  The key piece of information is the
 507     // type name the data source uses for each logical data type.
 508     // e.g. VARCHAR; Oracle calls it VARCHAR2.
 509     wxDbSqlTypeInfo typeInfVarchar;
 510     wxDbSqlTypeInfo typeInfInteger;
 511     wxDbSqlTypeInfo typeInfFloat;
 512     wxDbSqlTypeInfo typeInfDate;
 513     wxDbSqlTypeInfo typeInfBlob;
 514 #endif
 515
 516 public:
 517
 518     void             setCached(bool cached)  { dbIsCached = cached; };  // This function must only be called by wxDbGetConnection() and wxDbCloseConnections!!!
 519     bool             IsCached() { return dbIsCached; };
 520
 521     bool             GetDataTypeInfo(SWORD fSqlType, wxDbSqlTypeInfo &structSQLTypeInfo)
 522                             { return getDataTypeInfo(fSqlType, structSQLTypeInfo); }
 523
 524 #if wxODBC_BACKWARD_COMPATABILITY
 525     // ODBC handles
 526     HENV  henv;        // ODBC Environment handle
 527     HDBC  hdbc;        // ODBC DB Connection handle
 528     HSTMT hstmt;       // ODBC Statement handle
 529
 530     //Error reporting mode
 531     bool silent;
 532
 533     // Number of Ctable objects connected to this db object.  FOR INTERNAL USE ONLY!!!
 534     unsigned int nTables;
 535 #endif
 536
 537     // The following structure contains database information gathered from the
 538     // datasource when the datasource is first opened.
 539     struct
 540     {
 541         wxChar dbmsName[40];                             // Name of the dbms product
 542         wxChar dbmsVer[64];                              // Version # of the dbms product
 543         wxChar driverName[40];                           // Driver name
 544         wxChar odbcVer[60];                              // ODBC version of the driver
 545         wxChar drvMgrOdbcVer[60];                        // ODBC version of the driver manager
 546         wxChar driverVer[60];                            // Driver version
 547         wxChar serverName[80];                           // Server Name, typically a connect string
 548         wxChar databaseName[128];                        // Database filename
 549         wxChar outerJoins[2];                            // Indicates whether the data source supports outer joins
 550         wxChar procedureSupport[2];                      // Indicates whether the data source supports stored procedures
 551         wxChar accessibleTables[2];                      // Indicates whether the data source only reports accessible tables in SQLTables.
 552         UWORD  maxConnections;                           // Maximum # of connections the data source supports
 553         UWORD  maxStmts;                                 // Maximum # of HSTMTs per HDBC
 554         UWORD  apiConfLvl;                               // ODBC API conformance level
 555         UWORD  cliConfLvl;                               // Indicates whether the data source is SAG compliant
 556         UWORD  sqlConfLvl;                               // SQL conformance level
 557         UWORD  cursorCommitBehavior;                     // Indicates how cursors are affected by a db commit
 558         UWORD  cursorRollbackBehavior;                   // Indicates how cursors are affected by a db rollback
 559         UWORD  supportNotNullClause;                     // Indicates if data source supports NOT NULL clause
 560         wxChar supportIEF[2];                            // Integrity Enhancement Facility (Referential Integrity)
 561         UDWORD txnIsolation;                             // Default transaction isolation level supported by the driver
 562         UDWORD txnIsolationOptions;                      // Transaction isolation level options available
 563         UDWORD fetchDirections;                          // Fetch directions supported
 564         UDWORD lockTypes;                                // Lock types supported in SQLSetPos
 565         UDWORD posOperations;                            // Position operations supported in SQLSetPos
 566         UDWORD posStmts;                                 // Position statements supported
 567         UDWORD scrollConcurrency;                        // Concurrency control options supported for scrollable cursors
 568         UDWORD scrollOptions;                            // Scroll Options supported for scrollable cursors
 569         UDWORD staticSensitivity;                        // Indicates if additions, deletions and updates can be detected
 570         UWORD  txnCapable;                               // Indicates if the data source supports transactions
 571         UDWORD loginTimeout;                             // Number seconds to wait for a login request
 572     } dbInf;
 573
 574     // ODBC Error Inf.
 575     SWORD  cbErrorMsg;
 576     int    DB_STATUS;
 577     wxChar errorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
 578     wxChar errorMsg[SQL_MAX_MESSAGE_LENGTH];
 579     SDWORD nativeError;
 580     wxChar sqlState[20];
 581
 582 #if wxODBC_BACKWARD_COMPATABILITY
 583     // Information about logical data types VARCHAR, INTEGER, FLOAT and DATE.
 584      //
 585     // This information is obtained from the ODBC driver by use of the
 586     // SQLGetTypeInfo() function.  The key piece of information is the
 587     // type name the data source uses for each logical data type.
 588     // e.g. VARCHAR; Oracle calls it VARCHAR2.
 589     wxDbSqlTypeInfo typeInfVarchar;
 590     wxDbSqlTypeInfo typeInfInteger;
 591     wxDbSqlTypeInfo typeInfFloat;
 592     wxDbSqlTypeInfo typeInfDate;
 593     wxDbSqlTypeInfo typeInfBlob;
 594 #endif
 595
 596     // Public member functions
 597     wxDb(const HENV &aHenv, bool FwdOnlyCursors=(bool)wxODBC_FWD_ONLY_CURSORS);
 598     ~wxDb();
 599
 600     // Data Source Name, User ID, Password and whether open should fail on data type not supported
 601     bool         Open(const wxString &Dsn, const wxString &Uid, const wxString &AuthStr, bool failOnDataTypeUnsupported=TRUE);
 602     bool         Open(wxDbConnectInf *dbConnectInf);
 603     bool         Open(wxDb *copyDb);  // pointer to a wxDb whose connection info should be copied rather than re-queried
 604     void         Close(void);
 605     bool         CommitTrans(void);
 606     bool         RollbackTrans(void);
 607     bool         DispAllErrors(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
 608     bool         GetNextError(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
 609     void         DispNextError(void);
 610     bool         CreateView(const wxString &viewName, const wxString &colList, const wxString &pSqlStmt, bool attemptDrop=TRUE);
 611     bool         DropView(const wxString &viewName);
 612     bool         ExecSql(const wxString &pSqlStmt);
 613     bool         GetNext(void);
 614     bool         GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned);
 615     bool         Grant(int privileges, const wxString &tableName, const wxString &userList = wxT("PUBLIC"));
 616     int          TranslateSqlState(const wxString &SQLState);
 617     wxDbInf     *GetCatalog(const wxChar *userID=NULL);
 618     bool         Catalog(const wxChar *userID=NULL, const wxString &fileName=SQL_CATALOG_FILENAME);
 619     int          GetKeyFields(const wxString &tableName, wxDbColInf* colInf, UWORD noCols);
 620
 621     wxDbColInf  *GetColumns(wxChar *tableName[], const wxChar *userID=NULL);
 622     wxDbColInf  *GetColumns(const wxString &tableName, UWORD *numCols, const wxChar *userID=NULL);
 623
 624     int             GetColumnCount(const wxString &tableName, const wxChar *userID=NULL);
 625     const wxChar   *GetDatabaseName(void)  {return dbInf.dbmsName;}
 626     const wxString &GetDataSource(void)    {return dsn;}
 627     const wxString &GetDatasourceName(void){return dsn;}
 628     const wxString &GetUsername(void)      {return uid;}
 629     const wxString &GetPassword(void)      {return authStr;}
 630     bool            IsOpen(void)           {return dbIsOpen;}
 631     HENV            GetHENV(void)          {return henv;}
 632     HDBC            GetHDBC(void)          {return hdbc;}
 633     HSTMT           GetHSTMT(void)         {return hstmt;}
 634     int             GetTableCount()        {return nTables;}  // number of tables using this connection
 635     wxDbSqlTypeInfo GetTypeInfVarchar()    {return typeInfVarchar;}
 636     wxDbSqlTypeInfo GetTypeInfInteger()    {return typeInfInteger;}
 637     wxDbSqlTypeInfo GetTypeInfFloat()      {return typeInfFloat;}
 638     wxDbSqlTypeInfo GetTypeInfDate()       {return typeInfDate;}
 639     wxDbSqlTypeInfo GetTypeInfBlob()       {return typeInfBlob;}
 640
 641     // tableName can refer to a table, view, alias or synonym
 642     bool         TableExists(const wxString &tableName, const wxChar *userID=NULL,
 643                              const wxString &tablePath=wxEmptyString);
 644     bool         TablePrivileges(const wxString &tableName, const wxString &priv,
 645                                  const wxChar *userID=NULL, const wxChar *schema=NULL,
 646                                  const wxString &path=wxEmptyString);
 647
 648     // These two functions return the table name or column name in a form ready
 649     // for use in SQL statements.  For example, if the datasource allows spaces
 650     // in the table name or column name, the returned string will have the
 651     // correct enclosing marks around the name to allow it to be properly
 652     // included in a SQL statement
 653     const wxString  SQLTableName(const wxChar *tableName);
 654     const wxString  SQLColumnName(const wxChar *colName);
 655
 656     void         LogError(const wxString &errMsg, const wxString &SQLState = wxEmptyString)
 657                         { logError(errMsg, SQLState); }
 658     void         SetDebugErrorMessages(bool state) { silent = !state; }
 659     bool         SetSqlLogging(wxDbSqlLogState state, const wxString &filename = SQL_LOG_FILENAME,
 660                                bool append = FALSE);
 661     bool         WriteSqlLog(const wxString &logMsg);
 662
 663     wxDBMS       Dbms(void);
 664     bool         ModifyColumn(const wxString &tableName, const wxString &columnName,
 665                               int dataType, ULONG columnLength=0,
 666                               const wxString &optionalParam=wxEmptyString);
 667
 668     bool         FwdOnlyCursors(void)  {return fwdOnlyCursors;}
 669
 670     // These two functions are provided strictly for use by wxDbTable.
 671     // DO NOT USE THESE FUNCTIONS, OR MEMORY LEAKS MAY OCCUR
 672     void         incrementTableCount() { nTables++; return; }
 673     void         decrementTableCount() { nTables--; return; }
 674
 675 };  // wxDb
 676
 677
 678 // This structure forms a node in a linked list.  The linked list of "DbList" objects
 679 // keeps track of allocated database connections.  This allows the application to
 680 // open more than one database connection through ODBC for multiple transaction support
 681 // or for multiple database support.
 682 struct wxDbList
 683 {
 684     wxDbList *PtrPrev;       // Pointer to previous item in the list
 685     wxString  Dsn;           // Data Source Name
 686     wxString  Uid;           // User ID
 687     wxString  AuthStr;       // Authorization string (password)
 688     wxDb     *PtrDb;         // Pointer to the wxDb object
 689     bool      Free;          // Is item free or in use?
 690     wxDbList *PtrNext;       // Pointer to next item in the list
 691 };
 692
 693
 694 #ifdef __WXDEBUG__
 695 #include "wx/object.h"
 696 class wxTablesInUse : public wxObject
 697 {
 698     public:
 699         const wxChar  *tableName;
 700         ULONG          tableID;
 701         class wxDb    *pDb;
 702 };  // wxTablesInUse
 703 #endif
 704
 705
 706 // The following routines allow a user to get new database connections, free them
 707 // for other code segments to use, or close all of them when the application has
 708 // completed.
 709 wxDb  WXDLLIMPEXP_ODBC *wxDbGetConnection(wxDbConnectInf *pDbConfig, bool FwdOnlyCursors=(bool)wxODBC_FWD_ONLY_CURSORS);
 710 bool  WXDLLIMPEXP_ODBC  wxDbFreeConnection(wxDb *pDb);
 711 void  WXDLLIMPEXP_ODBC  wxDbCloseConnections(void);
 712 int   WXDLLIMPEXP_ODBC  wxDbConnectionsInUse(void);
 713
 714
 715 // Writes a message to the wxLog window (stdout usually) when an internal error
 716 // situation occurs.  This function only works in DEBUG builds
 717 const wxChar WXDLLIMPEXP_ODBC *
 718 wxDbLogExtendedErrorMsg(const wxChar *userText,
 719                         wxDb *pDb,
 720                         const wxChar *ErrFile,
 721                         int ErrLine);
 722
 723
 724 // This function sets the sql log state for all open wxDb objects
 725 bool WXDLLIMPEXP_ODBC
 726 wxDbSqlLog(wxDbSqlLogState state, const wxString &filename = SQL_LOG_FILENAME);
 727
 728
 729 #if 0
 730 // MSW/VC6 ONLY!!!  Experimental
 731 int WXDLLEXPORT wxDbCreateDataSource(const wxString &driverName, const wxString &dsn, const wxString &description=wxEmptyString,
 732                                      bool sysDSN=FALSE, const wxString &defDir=wxEmptyString, wxWindow *parent=NULL);
 733 #endif
 734
 735 // This routine allows you to query a driver manager
 736 // for a list of available datasources.  Call this routine
 737 // the first time using SQL_FETCH_FIRST.  Continue to call it
 738 // using SQL_FETCH_NEXT until you've exhausted the list.
 739 bool WXDLLIMPEXP_ODBC
 740 wxDbGetDataSource(HENV henv, wxChar *Dsn, SWORD DsnMax, wxChar *DsDesc,
 741                   SWORD DsDescMax, UWORD direction = SQL_FETCH_NEXT);
 742
 743
 744 // Change this to 0 to remove use of all deprecated functions
 745 #if wxODBC_BACKWARD_COMPATABILITY
 746 //#################################################################################
 747 //############### DEPRECATED functions for backward compatability #################
 748 //#################################################################################
 749
 750 // Backward compability structures/classes.  This will eventually go away
 751 const int DB_PATH_MAX      = wxDB_PATH_MAX;
 752
 753 typedef wxDb                 wxDB;
 754 typedef wxDbTableInf         wxTableInf;
 755 typedef wxDbColInf           wxColInf;
 756 typedef wxDbColInf           CcolInf;
 757 typedef wxDbColFor           wxColFor;
 758 typedef wxDbSqlTypeInfo      SqlTypeInfo;
 759 typedef wxDbSqlTypeInfo      wxSqlTypeInfo;
 760 typedef enum wxDbSqlLogState sqlLog;
 761 typedef enum wxDbSqlLogState wxSqlLogState;
 762 typedef enum wxDBMS          dbms;
 763 typedef enum wxDBMS          DBMS;
 764 typedef wxODBC_ERRORS        ODBC_ERRORS;
 765 typedef wxDbConnectInf       DbStuff;
 766 typedef wxDbList             DbList;
 767 #ifdef __WXDEBUG__
 768 typedef wxTablesInUse        CstructTablesInUse;
 769 #endif
 770
 771 // Deprecated function names that are replaced by the function names listed above
 772 wxDB  WXDLLIMPEXP_ODBC
 773 *GetDbConnection(DbStuff *pDbStuff, bool FwdOnlyCursors=(bool)wxODBC_FWD_ONLY_CURSORS);
 774 bool  WXDLLIMPEXP_ODBC  FreeDbConnection(wxDB *pDb);
 775 void  WXDLLIMPEXP_ODBC  CloseDbConnections(void);
 776 int   WXDLLIMPEXP_ODBC  NumberDbConnectionsInUse(void);
 777
 778 bool SqlLog(sqlLog state, const wxChar *filename = SQL_LOG_FILENAME);
 779
 780 bool WXDLLIMPEXP_ODBC
 781 GetDataSource(HENV henv, char *Dsn, SWORD DsnMax, char *DsDesc, SWORD DsDescMax,
 782               UWORD direction = SQL_FETCH_NEXT);
 783
 784 #endif  // Deprecated structures/classes/functions
 785
 786 #endif // _WX_DB_H_
 787