/////////////////////////////////////////////////////////////////////////////// // Name: db.h // Purpose: Header file wxDB class. The wxDB class represents a connection // to an ODBC data source. The wxDB class allows operations on the data // source such as opening and closing the data source. // Author: Doug Card // Modified by: // Mods: Dec, 1998: // -Added support for SQL statement logging and database cataloging // April, 1999 // -Added QUERY_ONLY mode support to reduce default number of cursors // -Added additional SQL logging code // -Added DEBUG-ONLY tracking of Ctable objects to detect orphaned DB connections // -Set ODBC option to only read committed writes to the DB so all // databases operate the same in that respect // // Created: 9.96 // RCS-ID: $Id$ // Copyright: (c) 1996 Remstar International, Inc. // Licence: wxWindows licence, plus: // Notice: This class library and its intellectual design are free of charge for use, // modification, enhancement, debugging under the following conditions: // 1) These classes may only be used as part of the implementation of a // wxWindows-based application // 2) All enhancements and bug fixes are to be submitted back to the wxWindows // user groups free of all charges for use with the wxWindows library. // 3) These classes may not be distributed as part of any other class library, // DLL, text (written or electronic), other than a complete distribution of // the wxWindows GUI development toolkit. // /////////////////////////////////////////////////////////////////////////////// /* // SYNOPSIS START // SYNOPSIS STOP */ #ifndef DB_DOT_H #define DB_DOT_H // Use this line for wxWindows v1.x //#include "wx_ver.h" // Use this line for wxWindows v2.x #include "wx/version.h" #if wxMAJOR_VERSION == 2 #ifdef __GNUG__ #pragma interface "db.h" #endif #include "wx/filefn.h" #endif #if defined(wx_msw) || defined(__WXMSW__) || defined(WIN32) #include #endif #ifdef __UNIX__ #if wxMAJOR_VERSION == 2 extern "C" { #include "../../src/iodbc/isql.h" #include "../../src/iodbc/isqlext.h" } #else // version == 1 extern "C" { #include "iodbc.h" #include "isqlext.h" } #endif typedef float SFLOAT; typedef double SDOUBLE; typedef unsigned int UINT; #define ULONG UDWORD #else // msw #define ODBCVER 0x0250 #include #include #endif #ifdef __UNIX__ # ifndef strnicmp # define strnicmp strncasecmp # endif # ifndef stricmp # define stricmp strcasecmp # endif #else # include #endif enum enumDummy {enumDum1}; #define SQL_C_BOOLEAN(datatype) (sizeof(datatype) == 1 ? SQL_C_UTINYINT : (sizeof(datatype) == 2 ? SQL_C_USHORT : SQL_C_ULONG)) // #define SQL_C_BOOLEAN (sizeof(Bool) == 2 ? SQL_C_USHORT : SQL_C_ULONG) #define SQL_C_ENUM (sizeof(enumDummy) == 2 ? SQL_C_USHORT : SQL_C_ULONG) #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif const int DB_PATH_MAX = 254; // Database Globals const int DB_TYPE_NAME_LEN = 40; const int DB_MAX_STATEMENT_LEN = 2048; const int DB_MAX_WHERE_CLAUSE_LEN = 1024; const int DB_MAX_ERROR_MSG_LEN = 512; const int DB_MAX_ERROR_HISTORY = 5; const int DB_MAX_TABLE_NAME_LEN = 128; const int DB_MAX_COLUMN_NAME_LEN = 128; const int DB_DATA_TYPE_VARCHAR = 1; const int DB_DATA_TYPE_INTEGER = 2; const int DB_DATA_TYPE_FLOAT = 3; const int DB_DATA_TYPE_DATE = 4; const int DB_SELECT_KEYFIELDS = 1; const int DB_SELECT_WHERE = 2; const int DB_SELECT_MATCHING = 3; const int DB_SELECT_STATEMENT = 4; const int DB_UPD_KEYFIELDS = 1; const int DB_UPD_WHERE = 2; const int DB_DEL_KEYFIELDS = 1; const int DB_DEL_WHERE = 2; const int DB_DEL_MATCHING = 3; const int DB_WHERE_KEYFIELDS = 1; const int DB_WHERE_MATCHING = 2; const int DB_GRANT_SELECT = 1; const int DB_GRANT_INSERT = 2; const int DB_GRANT_UPDATE = 4; const int DB_GRANT_DELETE = 8; const int DB_GRANT_ALL = DB_GRANT_SELECT | DB_GRANT_INSERT | DB_GRANT_UPDATE | DB_GRANT_DELETE; // ODBC Error codes (derived from ODBC SqlState codes) enum ODBC_ERRORS { DB_FAILURE = 0, DB_SUCCESS = 1, DB_ERR_NOT_IN_USE, DB_ERR_GENERAL_WARNING, // SqlState = '01000' DB_ERR_DISCONNECT_ERROR, // SqlState = '01002' DB_ERR_DATA_TRUNCATED, // SqlState = '01004' DB_ERR_PRIV_NOT_REVOKED, // SqlState = '01006' DB_ERR_INVALID_CONN_STR_ATTR, // SqlState = '01S00' DB_ERR_ERROR_IN_ROW, // SqlState = '01S01' DB_ERR_OPTION_VALUE_CHANGED, // SqlState = '01S02' DB_ERR_NO_ROWS_UPD_OR_DEL, // SqlState = '01S03' DB_ERR_MULTI_ROWS_UPD_OR_DEL, // SqlState = '01S04' DB_ERR_WRONG_NO_OF_PARAMS, // SqlState = '07001' DB_ERR_DATA_TYPE_ATTR_VIOL, // SqlState = '07006' DB_ERR_UNABLE_TO_CONNECT, // SqlState = '08001' DB_ERR_CONNECTION_IN_USE, // SqlState = '08002' DB_ERR_CONNECTION_NOT_OPEN, // SqlState = '08003' DB_ERR_REJECTED_CONNECTION, // SqlState = '08004' DB_ERR_CONN_FAIL_IN_TRANS, // SqlState = '08007' DB_ERR_COMM_LINK_FAILURE, // SqlState = '08S01' DB_ERR_INSERT_VALUE_LIST_MISMATCH, // SqlState = '21S01' DB_ERR_DERIVED_TABLE_MISMATCH, // SqlState = '21S02' DB_ERR_STRING_RIGHT_TRUNC, // SqlState = '22001' DB_ERR_NUMERIC_VALUE_OUT_OF_RNG, // SqlState = '22003' DB_ERR_ERROR_IN_ASSIGNMENT, // SqlState = '22005' DB_ERR_DATETIME_FLD_OVERFLOW, // SqlState = '22008' DB_ERR_DIVIDE_BY_ZERO, // SqlState = '22012' DB_ERR_STR_DATA_LENGTH_MISMATCH, // SqlState = '22026' DB_ERR_INTEGRITY_CONSTRAINT_VIOL, // SqlState = '23000' DB_ERR_INVALID_CURSOR_STATE, // SqlState = '24000' DB_ERR_INVALID_TRANS_STATE, // SqlState = '25000' DB_ERR_INVALID_AUTH_SPEC, // SqlState = '28000' DB_ERR_INVALID_CURSOR_NAME, // SqlState = '34000' DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL, // SqlState = '37000' DB_ERR_DUPLICATE_CURSOR_NAME, // SqlState = '3C000' DB_ERR_SERIALIZATION_FAILURE, // SqlState = '40001' DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL2, // SqlState = '42000' DB_ERR_OPERATION_ABORTED, // SqlState = '70100' DB_ERR_UNSUPPORTED_FUNCTION, // SqlState = 'IM001' DB_ERR_NO_DATA_SOURCE, // SqlState = 'IM002' DB_ERR_DRIVER_LOAD_ERROR, // SqlState = 'IM003' DB_ERR_SQLALLOCENV_FAILED, // SqlState = 'IM004' DB_ERR_SQLALLOCCONNECT_FAILED, // SqlState = 'IM005' DB_ERR_SQLSETCONNECTOPTION_FAILED, // SqlState = 'IM006' DB_ERR_NO_DATA_SOURCE_DLG_PROHIB, // SqlState = 'IM007' DB_ERR_DIALOG_FAILED, // SqlState = 'IM008' DB_ERR_UNABLE_TO_LOAD_TRANSLATION_DLL, // SqlState = 'IM009' DB_ERR_DATA_SOURCE_NAME_TOO_LONG, // SqlState = 'IM010' DB_ERR_DRIVER_NAME_TOO_LONG, // SqlState = 'IM011' DB_ERR_DRIVER_KEYWORD_SYNTAX_ERROR, // SqlState = 'IM012' DB_ERR_TRACE_FILE_ERROR, // SqlState = 'IM013' DB_ERR_TABLE_OR_VIEW_ALREADY_EXISTS, // SqlState = 'S0001' DB_ERR_TABLE_NOT_FOUND, // SqlState = 'S0002' DB_ERR_INDEX_ALREADY_EXISTS, // SqlState = 'S0011' DB_ERR_INDEX_NOT_FOUND, // SqlState = 'S0012' DB_ERR_COLUMN_ALREADY_EXISTS, // SqlState = 'S0021' DB_ERR_COLUMN_NOT_FOUND, // SqlState = 'S0022' DB_ERR_NO_DEFAULT_FOR_COLUMN, // SqlState = 'S0023' DB_ERR_GENERAL_ERROR, // SqlState = 'S1000' DB_ERR_MEMORY_ALLOCATION_FAILURE, // SqlState = 'S1001' DB_ERR_INVALID_COLUMN_NUMBER, // SqlState = 'S1002' DB_ERR_PROGRAM_TYPE_OUT_OF_RANGE, // SqlState = 'S1003' DB_ERR_SQL_DATA_TYPE_OUT_OF_RANGE, // SqlState = 'S1004' DB_ERR_OPERATION_CANCELLED, // SqlState = 'S1008' DB_ERR_INVALID_ARGUMENT_VALUE, // SqlState = 'S1009' DB_ERR_FUNCTION_SEQUENCE_ERROR, // SqlState = 'S1010' DB_ERR_OPERATION_INVALID_AT_THIS_TIME, // SqlState = 'S1011' DB_ERR_INVALID_TRANS_OPERATION_CODE, // SqlState = 'S1012' DB_ERR_NO_CURSOR_NAME_AVAIL, // SqlState = 'S1015' DB_ERR_INVALID_STR_OR_BUF_LEN, // SqlState = 'S1090' DB_ERR_DESCRIPTOR_TYPE_OUT_OF_RANGE, // SqlState = 'S1091' DB_ERR_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1092' DB_ERR_INVALID_PARAM_NO, // SqlState = 'S1093' DB_ERR_INVALID_SCALE_VALUE, // SqlState = 'S1094' DB_ERR_FUNCTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1095' DB_ERR_INF_TYPE_OUT_OF_RANGE, // SqlState = 'S1096' DB_ERR_COLUMN_TYPE_OUT_OF_RANGE, // SqlState = 'S1097' DB_ERR_SCOPE_TYPE_OUT_OF_RANGE, // SqlState = 'S1098' DB_ERR_NULLABLE_TYPE_OUT_OF_RANGE, // SqlState = 'S1099' DB_ERR_UNIQUENESS_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1100' DB_ERR_ACCURACY_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1101' DB_ERR_DIRECTION_OPTION_OUT_OF_RANGE, // SqlState = 'S1103' DB_ERR_INVALID_PRECISION_VALUE, // SqlState = 'S1104' DB_ERR_INVALID_PARAM_TYPE, // SqlState = 'S1105' DB_ERR_FETCH_TYPE_OUT_OF_RANGE, // SqlState = 'S1106' DB_ERR_ROW_VALUE_OUT_OF_RANGE, // SqlState = 'S1107' DB_ERR_CONCURRENCY_OPTION_OUT_OF_RANGE, // SqlState = 'S1108' DB_ERR_INVALID_CURSOR_POSITION, // SqlState = 'S1109' DB_ERR_INVALID_DRIVER_COMPLETION, // SqlState = 'S1110' DB_ERR_INVALID_BOOKMARK_VALUE, // SqlState = 'S1111' DB_ERR_DRIVER_NOT_CAPABLE, // SqlState = 'S1C00' DB_ERR_TIMEOUT_EXPIRED // SqlState = 'S1T00' }; struct DbStuff { HENV Henv; char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name char Uid[20+1]; // User ID char AuthStr[20+1]; // Authorization string (password) char description[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is char fileType[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is // Optionals needed for some databases like dBase char defaultDir[DB_PATH_MAX]; // Directory that db file resides in }; typedef struct { char TypeName[DB_TYPE_NAME_LEN]; int FsqlType; long Precision; short CaseSensitive; // short MinimumScale; short MaximumScale; } SqlTypeInfo; class WXDLLEXPORT CcolInf { public: char tableName[DB_MAX_TABLE_NAME_LEN+1]; char colName[DB_MAX_COLUMN_NAME_LEN+1]; int sqlDataType; }; enum sqlLog { sqlLogOFF, sqlLogON }; enum dbms { dbmsUNIDENTIFIED, dbmsORACLE, dbmsSYBASE_ASA, // Adaptive Server Anywhere dbmsSYBASE_ASE, // Adaptive Server Enterprise dbmsMS_SQL_SERVER, dbmsMY_SQL, dbmsPOSTGRES, dbmsACCESS, dbmsDBASE }; typedef enum dbms DBMS; // The wxDB::errorList is copied to this variable when the wxDB object // is closed. This way, the error list is still available after the // database object is closed. This is necessary if the database // connection fails so the calling application can show the operator // why the connection failed. Note: as each wxDB object is closed, it // will overwrite the errors of the previously destroyed wxDB object in // this variable. extern char DBerrorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN]; class WXDLLEXPORT wxDB { private: // Private data bool dbIsOpen; char *dsn; // Data source name char *uid; // User ID char *authStr; // Authorization string (password) FILE *fpSqlLog; // Sql Log file pointer enum sqlLog sqlLogState; // On or Off // Private member functions bool getDbInfo(void); bool getDataTypeInfo(SWORD fSqlType, SqlTypeInfo &structSQLTypeInfo); bool setConnectionOptions(void); void logError(char *errMsg, char *SQLState); public: // The following structure contains database information gathered from the // datasource when the datasource is first opened. struct { char dbmsName[40]; // Name of the dbms product char dbmsVer[64]; // Version # of the dbms product char driverName[40]; // Driver name char odbcVer[60]; // ODBC version of the driver char drvMgrOdbcVer[60]; // ODBC version of the driver manager char driverVer[60]; // Driver version char serverName[80]; // Server Name, typically a connect string char databaseName[128]; // Database filename char outerJoins[2]; // Indicates whether the data source supports outer joins char procedureSupport[2]; // Indicates whether the data source supports stored procedures UWORD maxConnections; // Maximum # of connections the data source supports UWORD maxStmts; // Maximum # of HSTMTs per HDBC UWORD apiConfLvl; // ODBC API conformance level UWORD cliConfLvl; // Indicates whether the data source is SAG compliant UWORD sqlConfLvl; // SQL conformance level UWORD cursorCommitBehavior; // Indicates how cursors are affected by a db commit UWORD cursorRollbackBehavior; // Indicates how cursors are affected by a db rollback UWORD supportNotNullClause; // Indicates if data source supports NOT NULL clause char supportIEF[2]; // Integrity Enhancement Facility (Referential Integrity) UDWORD txnIsolation; // Default transaction isolation level supported by the driver UDWORD txnIsolationOptions; // Transaction isolation level options available UDWORD fetchDirections; // Fetch directions supported UDWORD lockTypes; // Lock types supported in SQLSetPos UDWORD posOperations; // Position operations supported in SQLSetPos UDWORD posStmts; // Position statements supported UDWORD scrollConcurrency; // Concurrency control options supported for scrollable cursors UDWORD scrollOptions; // Scroll Options supported for scrollable cursors UDWORD staticSensitivity; // Indicates if additions, deletions and updates can be detected UWORD txnCapable; // Indicates if the data source supports transactions UDWORD loginTimeout; // Number seconds to wait for a login request } dbInf; // ODBC handles HENV henv; // ODBC Environment handle HDBC hdbc; // ODBC DB Connection handle HSTMT hstmt; // ODBC Statement handle // ODBC Error Inf. char sqlState[20]; SDWORD nativeError; char errorMsg[SQL_MAX_MESSAGE_LENGTH]; SWORD cbErrorMsg; char errorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN]; int DB_STATUS; //Error reporting mode bool silent; // Number of Ctable objects connected to this db object unsigned int nTables; // Inf. about logical data types VARCHAR, INTEGER, FLOAT and DATE. // This inf. is obtained from the ODBC driver by use of the // SQLGetTypeInfo() function. The key piece of inf. is the // type name the data source uses for each logical data type. // e.g. VARCHAR; Oracle calls it VARCHAR2. SqlTypeInfo typeInfVarchar, typeInfInteger, typeInfFloat, typeInfDate; // Public member functions wxDB(HENV &aHenv); bool Open(char *Dsn, char *Uid, char *AuthStr); // Data Source Name, User ID, Password void Close(void); bool CommitTrans(void); bool RollbackTrans(void); bool DispAllErrors(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT); bool GetNextError(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT); void DispNextError(void); bool CreateView(char *viewName, char *colList, char *pSqlStmt, bool attemptDrop=TRUE); bool DropView(char *viewName); bool ExecSql(char *pSqlStmt); bool GetNext(void); bool GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned); bool Grant(int privileges, char *tableName, char *userList = "PUBLIC"); int TranslateSqlState(char *SQLState); bool Catalog(char *userID, char *fileName = "Catalog.txt"); CcolInf *GetColumns(char *tableName[], char *userID=NULL); char *GetDatabaseName(void) {return dbInf.dbmsName;} char *GetDataSource(void) {return dsn;} char *GetUsername(void) {return uid;} char *GetPassword(void) {return authStr;} bool IsOpen(void) {return dbIsOpen;} HENV GetHENV(void) {return henv;} HDBC GetHDBC(void) {return hdbc;} HSTMT GetHSTMT(void) {return hstmt;} bool TableExists(char *tableName, char *userID=NULL, char *path=NULL); // Table name can refer to a table, view, alias or synonym void LogError(char *errMsg, char *SQLState = 0) {logError(errMsg, SQLState);} bool SqlLog(enum sqlLog state, char *filename = "sqllog.txt", bool append = FALSE); bool WriteSqlLog(char *logMsg); DBMS Dbms(void); }; // wxDB // This structure forms a node in a linked list. The linked list of "DbList" objects // keeps track of allocated database connections. This allows the application to // open more than one database connection through ODBC for multiple transaction support // or for multiple database support. struct DbList { DbList *PtrPrev; // Pointer to previous item in the list char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name wxDB *PtrDb; // Pointer to the wxDB object bool Free; // Is item free or in use? DbList *PtrNext; // Pointer to next item in the list }; #if __WXDEBUG__ > 0 #include "wx/object.h" class CstructTablesInUse : public wxObject { public: const char *tableName; ULONG tableID; class wxDB *pDb; }; // CstructTablesInUse #endif // The following routines allow a user to get new database connections, free them // for other code segments to use, or close all of them when the application has // completed. wxDB* WXDLLEXPORT GetDbConnection(DbStuff *pDbStuff); bool WXDLLEXPORT FreeDbConnection(wxDB *pDb); void WXDLLEXPORT CloseDbConnections(void); int WXDLLEXPORT NumberDbConnectionsInUse(void); // This function sets the sql log state for all open wxDB objects bool SqlLog(enum sqlLog state, char *filename = "sqllog.txt"); // This routine allows you to query a driver manager // for a list of available datasources. Call this routine // the first time using SQL_FETCH_FIRST. Continue to call it // using SQL_FETCH_NEXT until you've exhausted the list. bool WXDLLEXPORT GetDataSource(HENV henv, char *Dsn, SWORD DsnMax, char *DsDesc, SWORD DsDescMax, UWORD direction = SQL_FETCH_NEXT); #endif