include/wx/db.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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:
   8 // Mods:        Dec, 1998: Added support for SQL statement logging and database
   9 //              cataloging
  10 // Created:     9.96
  11 // RCS-ID:      $Id$
  12 // Copyright:   (c) 1996 Remstar International, Inc.
  13 // Licence:     wxWindows licence, plus:
  14 // Notice:              This class library and its intellectual design are free of charge for use,
  15 //              modification, enhancement, debugging under the following conditions:
  16 //              1) These classes may only be used as part of the implementation of a
  17 //                 wxWindows-based application
  18 //              2) All enhancements and bug fixes are to be submitted back to the wxWindows
  19 //                 user groups free of all charges for use with the wxWindows library.
  20 //              3) These classes may not be distributed as part of any other class library,
  21 //                 DLL, text (written or electronic), other than a complete distribution of
  22 //                 the wxWindows GUI development toolkit.
  23 //
  24 ///////////////////////////////////////////////////////////////////////////////
  25
  26 /*
  27 // SYNOPSIS START
  28 // SYNOPSIS STOP
  29 */
  30
  31 #ifndef DB_DOT_H
  32 #define DB_DOT_H
  33
  34 #ifdef __GNUG__
  35 #pragma interface "db.h"
  36 #endif
  37
  38 #if defined(__WXMSW__) || defined(WIN32)
  39 #include <windows.h>
  40 #endif
  41
  42
  43 #ifdef __WXGTK__
  44
  45 extern "C" {
  46 #include <../iodbc/isql.h>
  47 #include <../iodbc/isqlext.h>
  48 #include <../iodbc/odbc_funcs.h>
  49 #include <../iodbc/odbc_types.h>
  50
  51 typedef float   SFLOAT;
  52 typedef double  SDOUBLE;
  53 #define ULONG UDWORD
  54
  55 }
  56
  57 #else
  58
  59 #define ODBCVER 0x0250
  60 #include <sql.h>
  61 #include <sqlext.h>
  62
  63 #endif
  64
  65 enum            enumDummy               {enumDum1};
  66
  67 #define SQL_C_BOOLEAN (sizeof(int) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
  68 #define SQL_C_ENUM (sizeof(enumDummy) == 2 ? SQL_C_USHORT : SQL_C_ULONG)    //glt 2-21-97
  69
  70 // Database Globals
  71 const int DB_TYPE_NAME_LEN                                              = 40;
  72 const int DB_MAX_STATEMENT_LEN                                  = 2048;
  73 const int DB_MAX_WHERE_CLAUSE_LEN                               = 1024;
  74 const int DB_MAX_ERROR_MSG_LEN                                  = 512;
  75 const int DB_MAX_ERROR_HISTORY                                  = 5;
  76 const int DB_MAX_TABLE_NAME_LEN                         = 128;
  77 const int DB_MAX_COLUMN_NAME_LEN                                = 128;
  78
  79 const int DB_DATA_TYPE_VARCHAR                                  = 1;
  80 const int DB_DATA_TYPE_INTEGER                                  = 2;
  81 const int DB_DATA_TYPE_FLOAT                                    = 3;
  82 const int DB_DATA_TYPE_DATE                                             = 4;
  83
  84 const int DB_SELECT_KEYFIELDS                                   = 1;
  85 const int DB_SELECT_WHERE                                               = 2;
  86 const int DB_SELECT_MATCHING                                    = 3;
  87 const int DB_SELECT_STATEMENT                                   = 4;
  88
  89 const int DB_UPD_KEYFIELDS                                              = 1;
  90 const int DB_UPD_WHERE                                                  = 2;
  91
  92 const int DB_DEL_KEYFIELDS                                              = 1;
  93 const int DB_DEL_WHERE                                                  = 2;
  94 const int DB_DEL_MATCHING                                               = 3;
  95
  96 const int DB_WHERE_KEYFIELDS                                    = 1;
  97 const int DB_WHERE_MATCHING                                             = 2;
  98
  99 const int DB_CURSOR0                                                            = 0;
 100 const int DB_CURSOR1                                                            = 1;
 101 const int DB_CURSOR2                                                            = 2;
 102 //const int DB_CURSOR3                                                  = 3;
 103 //const int DB_CURSOR4                                                  = 4;
 104 //const int DB_CURSOR5                                                  = 5;
 105
 106 const int DB_GRANT_SELECT                                               = 1;
 107 const int DB_GRANT_INSERT                                               = 2;
 108 const int DB_GRANT_UPDATE                                               = 4;
 109 const int DB_GRANT_DELETE                                               = 8;
 110 const int DB_GRANT_ALL                                                  = DB_GRANT_SELECT | DB_GRANT_INSERT | DB_GRANT_UPDATE | DB_GRANT_DELETE;
 111
 112 // ODBC Error codes (derived from ODBC SqlState codes)
 113 enum ODBC_ERRORS
 114 {
 115         DB_FAILURE                                                                      = 0,
 116         DB_SUCCESS                                                                      = 1,
 117         DB_ERR_NOT_IN_USE,
 118         DB_ERR_GENERAL_WARNING,                                                                 // SqlState = '01000'
 119         DB_ERR_DISCONNECT_ERROR,                                                                // SqlState = '01002'
 120         DB_ERR_DATA_TRUNCATED,                                                                  // SqlState = '01004'
 121         DB_ERR_PRIV_NOT_REVOKED,                                                                // SqlState = '01006'
 122         DB_ERR_INVALID_CONN_STR_ATTR,                                                   // SqlState = '01S00'
 123         DB_ERR_ERROR_IN_ROW,                                                                            // SqlState = '01S01'
 124         DB_ERR_OPTION_VALUE_CHANGED,                                                    // SqlState = '01S02'
 125         DB_ERR_NO_ROWS_UPD_OR_DEL,                                                              // SqlState = '01S03'
 126         DB_ERR_MULTI_ROWS_UPD_OR_DEL,                                                   // SqlState = '01S04'
 127         DB_ERR_WRONG_NO_OF_PARAMS,                                                              // SqlState = '07001'
 128         DB_ERR_DATA_TYPE_ATTR_VIOL,                                                     // SqlState = '07006'
 129         DB_ERR_UNABLE_TO_CONNECT,                                                               // SqlState = '08001'
 130         DB_ERR_CONNECTION_IN_USE,                                                               // SqlState = '08002'
 131         DB_ERR_CONNECTION_NOT_OPEN,                                                     // SqlState = '08003'
 132         DB_ERR_REJECTED_CONNECTION,                                                     // SqlState = '08004'
 133         DB_ERR_CONN_FAIL_IN_TRANS,                                                              // SqlState = '08007'
 134         DB_ERR_COMM_LINK_FAILURE,                                                               // SqlState = '08S01'
 135         DB_ERR_INSERT_VALUE_LIST_MISMATCH,                                      // SqlState = '21S01'
 136         DB_ERR_DERIVED_TABLE_MISMATCH,                                          // SqlState = '21S02'
 137         DB_ERR_STRING_RIGHT_TRUNC,                                                              // SqlState = '22001'
 138         DB_ERR_NUMERIC_VALUE_OUT_OF_RNG,                                                // SqlState = '22003'
 139         DB_ERR_ERROR_IN_ASSIGNMENT,                                                     // SqlState = '22005'
 140         DB_ERR_DATETIME_FLD_OVERFLOW,                                                   // SqlState = '22008'
 141         DB_ERR_DIVIDE_BY_ZERO,                                                                  // SqlState = '22012'
 142         DB_ERR_STR_DATA_LENGTH_MISMATCH,                                                // SqlState = '22026'
 143         DB_ERR_INTEGRITY_CONSTRAINT_VIOL,                                       // SqlState = '23000'
 144         DB_ERR_INVALID_CURSOR_STATE,                                                    // SqlState = '24000'
 145         DB_ERR_INVALID_TRANS_STATE,                                                     // SqlState = '25000'
 146         DB_ERR_INVALID_AUTH_SPEC,                                                               // SqlState = '28000'
 147         DB_ERR_INVALID_CURSOR_NAME,                                                     // SqlState = '34000'
 148         DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL,                                     // SqlState = '37000'
 149         DB_ERR_DUPLICATE_CURSOR_NAME,                                                   // SqlState = '3C000'
 150         DB_ERR_SERIALIZATION_FAILURE,                                                   // SqlState = '40001'
 151         DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL2,                            // SqlState = '42000'
 152         DB_ERR_OPERATION_ABORTED,                                                               // SqlState = '70100'
 153         DB_ERR_UNSUPPORTED_FUNCTION,                                                    // SqlState = 'IM001'
 154         DB_ERR_NO_DATA_SOURCE,                                                                  // SqlState = 'IM002'
 155         DB_ERR_DRIVER_LOAD_ERROR,                                                               // SqlState = 'IM003'
 156         DB_ERR_SQLALLOCENV_FAILED,                                                              // SqlState = 'IM004'
 157         DB_ERR_SQLALLOCCONNECT_FAILED,                                          // SqlState = 'IM005'
 158         DB_ERR_SQLSETCONNECTOPTION_FAILED,                                      // SqlState = 'IM006'
 159         DB_ERR_NO_DATA_SOURCE_DLG_PROHIB,                                       // SqlState = 'IM007'
 160         DB_ERR_DIALOG_FAILED,                                                                   // SqlState = 'IM008'
 161         DB_ERR_UNABLE_TO_LOAD_TRANSLATION_DLL,                          // SqlState = 'IM009'
 162         DB_ERR_DATA_SOURCE_NAME_TOO_LONG,                                       // SqlState = 'IM010'
 163         DB_ERR_DRIVER_NAME_TOO_LONG,                                                    // SqlState = 'IM011'
 164         DB_ERR_DRIVER_KEYWORD_SYNTAX_ERROR,                                     // SqlState = 'IM012'
 165         DB_ERR_TRACE_FILE_ERROR,                                                                // SqlState = 'IM013'
 166         DB_ERR_TABLE_OR_VIEW_ALREADY_EXISTS,                            // SqlState = 'S0001'
 167         DB_ERR_TABLE_NOT_FOUND,                                                                 // SqlState = 'S0002'
 168         DB_ERR_INDEX_ALREADY_EXISTS,                                                    // SqlState = 'S0011'
 169         DB_ERR_INDEX_NOT_FOUND,                                                                 // SqlState = 'S0012'
 170         DB_ERR_COLUMN_ALREADY_EXISTS,                                                   // SqlState = 'S0021'
 171         DB_ERR_COLUMN_NOT_FOUND,                                                                // SqlState = 'S0022'
 172         DB_ERR_NO_DEFAULT_FOR_COLUMN,                                                   // SqlState = 'S0023'
 173         DB_ERR_GENERAL_ERROR,                                                                   // SqlState = 'S1000'
 174         DB_ERR_MEMORY_ALLOCATION_FAILURE,                                       // SqlState = 'S1001'
 175         DB_ERR_INVALID_COLUMN_NUMBER,                                                   // SqlState = 'S1002'
 176         DB_ERR_PROGRAM_TYPE_OUT_OF_RANGE,                                       // SqlState = 'S1003'
 177         DB_ERR_SQL_DATA_TYPE_OUT_OF_RANGE,                                      // SqlState = 'S1004'
 178         DB_ERR_OPERATION_CANCELLED,                                                     // SqlState = 'S1008'
 179         DB_ERR_INVALID_ARGUMENT_VALUE,                                          // SqlState = 'S1009'
 180         DB_ERR_FUNCTION_SEQUENCE_ERROR,                                         // SqlState = 'S1010'
 181         DB_ERR_OPERATION_INVALID_AT_THIS_TIME,                          // SqlState = 'S1011'
 182         DB_ERR_INVALID_TRANS_OPERATION_CODE,                            // SqlState = 'S1012'
 183         DB_ERR_NO_CURSOR_NAME_AVAIL,                                                    // SqlState = 'S1015'
 184         DB_ERR_INVALID_STR_OR_BUF_LEN,                                          // SqlState = 'S1090'
 185         DB_ERR_DESCRIPTOR_TYPE_OUT_OF_RANGE,                            // SqlState = 'S1091'
 186         DB_ERR_OPTION_TYPE_OUT_OF_RANGE,                                                // SqlState = 'S1092'
 187         DB_ERR_INVALID_PARAM_NO,                                                                // SqlState = 'S1093'
 188         DB_ERR_INVALID_SCALE_VALUE,                                                     // SqlState = 'S1094'
 189         DB_ERR_FUNCTION_TYPE_OUT_OF_RANGE,                                      // SqlState = 'S1095'
 190         DB_ERR_INF_TYPE_OUT_OF_RANGE,                                                   // SqlState = 'S1096'
 191         DB_ERR_COLUMN_TYPE_OUT_OF_RANGE,                                                // SqlState = 'S1097'
 192         DB_ERR_SCOPE_TYPE_OUT_OF_RANGE,                                         // SqlState = 'S1098'
 193         DB_ERR_NULLABLE_TYPE_OUT_OF_RANGE,                                      // SqlState = 'S1099'
 194         DB_ERR_UNIQUENESS_OPTION_TYPE_OUT_OF_RANGE,             // SqlState = 'S1100'
 195         DB_ERR_ACCURACY_OPTION_TYPE_OUT_OF_RANGE,                       // SqlState = 'S1101'
 196         DB_ERR_DIRECTION_OPTION_OUT_OF_RANGE,                           // SqlState = 'S1103'
 197         DB_ERR_INVALID_PRECISION_VALUE,                                         // SqlState = 'S1104'
 198         DB_ERR_INVALID_PARAM_TYPE,                                                              // SqlState = 'S1105'
 199         DB_ERR_FETCH_TYPE_OUT_OF_RANGE,                                         // SqlState = 'S1106'
 200         DB_ERR_ROW_VALUE_OUT_OF_RANGE,                                          // SqlState = 'S1107'
 201         DB_ERR_CONCURRENCY_OPTION_OUT_OF_RANGE,                 // SqlState = 'S1108'
 202         DB_ERR_INVALID_CURSOR_POSITION,                                         // SqlState = 'S1109'
 203         DB_ERR_INVALID_DRIVER_COMPLETION,                                       // SqlState = 'S1110'
 204         DB_ERR_INVALID_BOOKMARK_VALUE,                                          // SqlState = 'S1111'
 205         DB_ERR_DRIVER_NOT_CAPABLE,                                                              // SqlState = 'S1C00'
 206         DB_ERR_TIMEOUT_EXPIRED                                                                  // SqlState = 'S1T00'
 207 };
 208
 209 struct DbStuff
 210 {
 211         HENV Henv;
 212         char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name
 213         char Uid[20];                                                   // User ID
 214         char AuthStr[20];                                               // Authorization string (password)
 215 };
 216
 217 typedef struct
 218 {
 219         char    TypeName[DB_TYPE_NAME_LEN];
 220         int     FsqlType;
 221         long    Precision;
 222         short   CaseSensitive;
 223 //      short MinimumScale;
 224         short MaximumScale;
 225 } SqlTypeInfo;
 226
 227 class WXDLLEXPORT CcolInf
 228 {
 229 public:
 230         char tableName[DB_MAX_TABLE_NAME_LEN+1];
 231         char colName[DB_MAX_COLUMN_NAME_LEN+1];
 232         int  sqlDataType;
 233 };
 234
 235 enum sqlLog
 236 {
 237         sqlLogOFF,
 238         sqlLogON
 239 };
 240
 241 class WXDLLEXPORT wxDB
 242 {
 243 private:
 244
 245         // Private data
 246         bool                    dbIsOpen;
 247         char                    *dsn;                           // Data source name
 248         char                    *uid;                           // User ID
 249         char                    *authStr;               // Authorization string (password)
 250         FILE                    *fpSqlLog;              // Sql Log file pointer
 251         enum sqlLog sqlLogState;        // On or Off
 252
 253         // Private member functions
 254         bool getDbInfo(void);
 255         bool getDataTypeInfo(SWORD fSqlType, SqlTypeInfo &structSQLTypeInfo);
 256         bool setConnectionOptions(void);
 257         void logError(char *errMsg, char *SQLState);
 258
 259 public:
 260
 261         // The following structure contains database information gathered from the
 262         // datasource when the datasource is first opened.
 263         struct
 264         {
 265                 char   dbmsName[40];                                                            // Name of the dbms product
 266                 char   dbmsVer[20];                                                             // Version # of the dbms product
 267                 char   driverName[40];                                                  // Driver name
 268                 char   odbcVer[20];                                                             // ODBC version of the driver
 269                 char   drvMgrOdbcVer[20];                                               // ODBC version of the driver manager
 270                 char   driverVer[40];                                                   // Driver version
 271                 char   serverName[40];                                                  // Server Name, typically a connect string
 272                 char     databaseName[128];                                             // Database filename
 273                 char   outerJoins[2];                                                   // Indicates whether the data source supports outer joins
 274                 char     procedureSupport[2];                                   // Indicates whether the data source supports stored procedures
 275                 UWORD  maxConnections;                                                  // Maximum # of connections the data source supports
 276                 UWORD  maxStmts;                                                                        // Maximum # of HSTMTs per HDBC
 277                 UWORD  apiConfLvl;                                                              // ODBC API conformance level
 278                 UWORD  cliConfLvl;                                                              // Indicates whether the data source is SAG compliant
 279                 UWORD  sqlConfLvl;                                                              // SQL conformance level
 280                 UWORD  cursorCommitBehavior;                                    // Indicates how cursors are affected by a db commit
 281                 UWORD  cursorRollbackBehavior;                          // Indicates how cursors are affected by a db rollback
 282                 UWORD  supportNotNullClause;                                    // Indicates if data source supports NOT NULL clause
 283                 char   supportIEF[2];                                                   // Integrity Enhancement Facility (Referential Integrity)
 284                 UDWORD txnIsolation;                                                            // Default transaction isolation level supported by the driver
 285                 UDWORD txnIsolationOptions;                                     // Transaction isolation level options available
 286                 UDWORD fetchDirections;                                                 // Fetch directions supported
 287                 UDWORD lockTypes;                                                                       // Lock types supported in SQLSetPos
 288                 UDWORD posOperations;                                                   // Position operations supported in SQLSetPos
 289                 UDWORD posStmts;                                                                        // Position statements supported
 290                 UDWORD scrollConcurrency;                                               // Concurrency control options supported for scrollable cursors
 291                 UDWORD scrollOptions;                                                   // Scroll Options supported for scrollable cursors
 292                 UDWORD staticSensitivity;                                               // Indicates if additions, deletions and updates can be detected
 293                 UWORD  txnCapable;                                                              // Indicates if the data source supports transactions
 294                 UDWORD loginTimeout;                                                            // Number seconds to wait for a login request
 295         } dbInf;
 296
 297         // ODBC handles
 298         HENV  henv;             // ODBC Environment handle
 299         HDBC  hdbc;             // ODBC DB Connection handle
 300         HSTMT hstmt;    // ODBC Statement handle
 301
 302         // ODBC Error Inf.
 303         char   sqlState[20];
 304         SDWORD nativeError;
 305         char   errorMsg[SQL_MAX_MESSAGE_LENGTH];
 306         SWORD  cbErrorMsg;
 307         char   errorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
 308         int    DB_STATUS;
 309
 310         //Error reporting mode
 311         bool silent;
 312
 313         // Inf. about logical data types VARCHAR, INTEGER, FLOAT and DATE.
 314         // This inf. is obtained from the ODBC driver by use of the
 315         // SQLGetTypeInfo() function.  The key piece of inf. is the
 316         // type name the data source uses for each logical data type.
 317         // e.g. VARCHAR; Oracle calls it VARCHAR2.
 318         SqlTypeInfo typeInfVarchar, typeInfInteger, typeInfFloat, typeInfDate;
 319
 320         // Public member functions
 321         wxDB(HENV &aHenv);
 322         bool             Open(char *Dsn, char *Uid, char *AuthStr);  // Data Source Name, User ID, Password
 323         void             Close(void);
 324         bool             CommitTrans(void);
 325         bool             RollbackTrans(void);
 326         bool             DispAllErrors(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
 327         bool             GetNextError(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
 328         void             DispNextError(void);
 329         bool             CreateView(char *viewName, char *colList, char *pSqlStmt);
 330         bool             ExecSql(char *pSqlStmt);
 331         bool        Grant(int privileges, char *tableName, char *userList = "PUBLIC");
 332         int         TranslateSqlState(char *SQLState);
 333         bool             Catalog(char *userID, char *fileName = "Catalog.txt");
 334         CcolInf *GetColumns(char *tableName[]);
 335         char            *GetDatabaseName(void)  {return dbInf.dbmsName;}
 336         char            *GetDataSource(void)            {return dsn;}
 337         char            *GetUsername(void)              {return uid;}
 338         char            *GetPassword(void)              {return authStr;}
 339         bool             IsOpen(void)                           {return dbIsOpen;}
 340         HENV             GetHENV(void)                          {return henv;}
 341         HDBC             GetHDBC(void)                          {return hdbc;}
 342         HSTMT            GetHSTMT(void)                 {return hstmt;}
 343         bool             TableExists(char *tableName);  // Table name can refer to a table, view, alias or synonym
 344         void             LogError(char *errMsg, char *SQLState = 0) {logError(errMsg, SQLState);}
 345         bool             SqlLog(enum sqlLog state, char *filename = "sqllog.txt", bool append = FALSE);
 346         bool             WriteSqlLog(char *logMsg);
 347
 348 };  // wxDB
 349
 350 // This structure forms a node in a linked list.  The linked list of "DbList" objects
 351 // keeps track of allocated database connections.  This allows the application to
 352 // open more than one database connection through ODBC for multiple transaction support
 353 // or for multiple database support.
 354
 355 struct DbList
 356 {
 357         DbList *PtrPrev;                                                        // Pointer to previous item in the list
 358         char    Dsn[SQL_MAX_DSN_LENGTH+1];      // Data Source Name
 359         wxDB     *PtrDb;                                                                // Pointer to the wxDB object
 360         bool    Free;                                                           // Is item free or in use?
 361         DbList *PtrNext;                                                        // Pointer to next item in the list
 362 };
 363
 364 // The following routines allow a user to get new database connections, free them
 365 // for other code segments to use, or close all of them when the application has
 366 // completed.
 367
 368 wxDB* WXDLLEXPORT GetDbConnection(DbStuff *pDbStuff);
 369 bool  WXDLLEXPORT FreeDbConnection(wxDB *pDb);
 370 void  WXDLLEXPORT CloseDbConnections(void);
 371 int   WXDLLEXPORT NumberDbConnectionsInUse(void);
 372
 373 // This routine allows you to query a driver manager
 374 // for a list of available datasources.  Call this routine
 375 // the first time using SQL_FETCH_FIRST.  Continue to call it
 376 // using SQL_FETCH_NEXT until you've exhausted the list.
 377 bool WXDLLEXPORT GetDataSource(HENV henv, char *Dsn, SWORD DsnMax, char *DsDesc, SWORD DsDescMax,
 378                                                  UWORD direction = SQL_FETCH_NEXT);
 379
 380 #endif