X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e179bd6537b8e3d7543d23db3b6735ea7effe159..12db77cab1054d288a2b3e2d07e58ad1d6386a53:/src/common/db.cpp diff --git a/src/common/db.cpp b/src/common/db.cpp index 5df993b4bf..073e09d252 100644 --- a/src/common/db.cpp +++ b/src/common/db.cpp @@ -5,13 +5,19 @@ // 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 +// Mods: Dec, 1998: +// -Added support for SQL statement logging and database cataloging +// Mods: April, 1999 +// -Added QUERY_ONLY mode support to reduce default number of cursors +// -Added additional SQL logging code +// -Added DEBUG-ONLY tracking of wxTable 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, +// 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 @@ -22,30 +28,48 @@ // the wxWindows GUI development toolkit. /////////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "db.h" -#endif - /* // SYNOPSIS START // SYNOPSIS STOP */ -/* +// Use this line for wxWindows v1.x +//#include "wx_ver.h" +// Use this line for wxWindows v2.x +#include "wx/version.h" +#include "wx/wxprec.h" + +#if wxMAJOR_VERSION == 2 + #ifdef __GNUG__ + #pragma implementation "db.h" + #endif +#endif + #ifdef DBDEBUG_CONSOLE #include #endif -*/ - -#include "wx/wxprec.h" #ifdef __BORLANDC__ - #pragma hdrstop + #pragma hdrstop #endif //__BORLANDC__ -#ifndef WX_PRECOMP - #include "wx/string.h" -#endif //WX_PRECOMP +#if wxMAJOR_VERSION == 2 + #ifndef WX_PRECOMP + #include "wx/string.h" + #endif //WX_PRECOMP + #include "wx/filefn.h" +#endif + +#if wxMAJOR_VERSION == 1 +# if defined(wx_msw) || defined(wx_x) +# ifdef WX_PRECOMP +# include "wx_prec.h" +# else +# include "wx.h" +# endif +# endif +# define wxUSE_ODBC 1 +#endif #if wxUSE_ODBC @@ -54,9 +78,37 @@ #include #include #include -#include "wx/db.h" +#if wxMAJOR_VERSION == 1 + #include "db.h" +#elif wxMAJOR_VERSION == 2 + #include "wx/db.h" +#endif -DbList* WXDLLEXPORT PtrBegDbList = 0; +DbList WXDLLEXPORT *PtrBegDbList = 0; + +#if __WXDEBUG__ > 0 + #if wxMAJOR_VERSION == 2 + #include "wx/object.h" + #include "wx/list.h" + #include "wx/utils.h" + #include "wx/msgdlg.h" + #endif + extern wxList TablesInUse; +#endif + +// SQL Log defaults to be used by GetDbConnection +enum sqlLog SQLLOGstate = sqlLogOFF; + +char SQLLOGfn[DB_PATH_MAX+1] = "sqllog.txt"; + +// 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. +char DBerrorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN]; /********** wxDB Constructor **********/ wxDB::wxDB(HENV &aHenv) @@ -65,6 +117,7 @@ wxDB::wxDB(HENV &aHenv) fpSqlLog = 0; // Sql Log file pointer sqlLogState = sqlLogOFF; // By default, logging is turned off + nTables = 0; strcpy(sqlState,""); strcpy(errorMsg,""); @@ -123,10 +176,10 @@ bool wxDB::Open(char *Dsn, char *Uid, char *AuthStr) uid = Uid; authStr = AuthStr; -#ifndef FWD_ONLY_CURSORS - RETCODE retcode; +#ifndef FWD_ONLY_CURSORS + // Specify that the ODBC cursor library be used, if needed. This must be // specified before the connection is made. retcode = SQLSetConnectOption(hdbc, SQL_ODBC_CURSORS, SQL_CUR_USE_IF_NEEDED); @@ -141,11 +194,21 @@ bool wxDB::Open(char *Dsn, char *Uid, char *AuthStr) #endif // Connect to the data source - if (SQLConnect(hdbc, (UCHAR FAR *) Dsn, SQL_NTS, - (UCHAR FAR *) Uid, SQL_NTS, - (UCHAR FAR *) AuthStr, SQL_NTS) != SQL_SUCCESS) + retcode = SQLConnect(hdbc, (UCHAR FAR *) Dsn, SQL_NTS, + (UCHAR FAR *) Uid, SQL_NTS, + (UCHAR FAR *) AuthStr,SQL_NTS); + if (retcode == SQL_SUCCESS_WITH_INFO) + DispAllErrors(henv, hdbc); + else if (retcode != SQL_SUCCESS) return(DispAllErrors(henv, hdbc)); +/* + If using Intersolv branded ODBC drivers, this is the place where you would substitute + your branded driver license information + + SQLSetConnectOption(hdbc, 1041, (UDWORD) ""); + SQLSetConnectOption(hdbc, 1042, (UDWORD) ""); +*/ // Mark database as open dbIsOpen = TRUE; @@ -241,10 +304,20 @@ bool wxDB::Open(char *Dsn, char *Uid, char *AuthStr) typeInfInteger.FsqlType = SQL_INTEGER; // Date/Time - if (! getDataTypeInfo(SQL_TIMESTAMP, typeInfDate)) - return(FALSE); + if (Dbms() != dbmsDBASE) + { + if (! getDataTypeInfo(SQL_TIMESTAMP, typeInfDate)) + return(FALSE); + else + typeInfDate.FsqlType = SQL_TIMESTAMP; + } else - typeInfDate.FsqlType = SQL_TIMESTAMP; + { + if (! getDataTypeInfo(SQL_DATE, typeInfDate)) + return(FALSE); + else + typeInfDate.FsqlType = SQL_DATE; + } #ifdef DBDEBUG_CONSOLE cout << "VARCHAR DATA TYPE: " << typeInfVarchar.TypeName << endl; @@ -309,8 +382,9 @@ bool wxDB::setConnectionOptions(void) bool wxDB::getDbInfo(void) { SWORD cb; + RETCODE retcode; - if (SQLGetInfo(hdbc, SQL_SERVER_NAME, (UCHAR*) dbInf.serverName, 40, &cb) != SQL_SUCCESS) + if (SQLGetInfo(hdbc, SQL_SERVER_NAME, (UCHAR*) dbInf.serverName, 80, &cb) != SQL_SUCCESS) return(DispAllErrors(henv, hdbc)); if (SQLGetInfo(hdbc, SQL_DATABASE_NAME, (UCHAR*) dbInf.databaseName, 128, &cb) != SQL_SUCCESS) @@ -319,7 +393,11 @@ bool wxDB::getDbInfo(void) if (SQLGetInfo(hdbc, SQL_DBMS_NAME, (UCHAR*) dbInf.dbmsName, 40, &cb) != SQL_SUCCESS) return(DispAllErrors(henv, hdbc)); - if (SQLGetInfo(hdbc, SQL_DBMS_VER, (UCHAR*) dbInf.dbmsVer, 40, &cb) != SQL_SUCCESS) + // 16-Mar-1999 + // After upgrading to MSVC6, the original 20 char buffer below was insufficient, + // causing database connectivity to fail in some cases. + retcode = SQLGetInfo(hdbc, SQL_DBMS_VER, (UCHAR*) dbInf.dbmsVer, 64, &cb); + if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO ) return(DispAllErrors(henv, hdbc)); if (SQLGetInfo(hdbc, SQL_ACTIVE_CONNECTIONS, (UCHAR*) &dbInf.maxConnections, sizeof(dbInf.maxConnections), &cb) != SQL_SUCCESS) @@ -334,7 +412,8 @@ bool wxDB::getDbInfo(void) if (SQLGetInfo(hdbc, SQL_DRIVER_ODBC_VER, (UCHAR*) dbInf.odbcVer, 60, &cb) == SQL_ERROR) return(DispAllErrors(henv, hdbc)); - if (SQLGetInfo(hdbc, SQL_ODBC_VER, (UCHAR*) dbInf.drvMgrOdbcVer, 60, &cb) == SQL_ERROR) + retcode = SQLGetInfo(hdbc, SQL_ODBC_VER, (UCHAR*) dbInf.drvMgrOdbcVer, 60, &cb); + if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO) return(DispAllErrors(henv, hdbc)); if (SQLGetInfo(hdbc, SQL_DRIVER_VER, (UCHAR*) dbInf.driverVer, 60, &cb) == SQL_ERROR) @@ -635,8 +714,14 @@ bool wxDB::getDataTypeInfo(SWORD fSqlType, SqlTypeInfo &structSQLTypeInfo) return(DispAllErrors(henv, hdbc, hstmt)); // if (SQLGetData(hstmt, 14, SQL_C_SHORT, (UCHAR*) &structSQLTypeInfo.MinimumScale, 0, &cbRet) != SQL_SUCCESS) // return(DispAllErrors(henv, hdbc, hstmt)); - if (SQLGetData(hstmt, 15, SQL_C_SHORT, (UCHAR*) &structSQLTypeInfo.MaximumScale, 0, &cbRet) != SQL_SUCCESS) + +//#ifdef __UNIX__ // BJO : IODBC knows about 5, not 15... +// if (SQLGetData(hstmt, 5, SQL_C_SHORT,(UCHAR*) &structSQLTypeInfo.MaximumScale, 0, &cbRet) != SQL_SUCCESS) +// return(DispAllErrors(henv, hdbc, hstmt)); +//#else + if (SQLGetData(hstmt, 15, SQL_C_SHORT,(UCHAR*) &structSQLTypeInfo.MaximumScale, 0, &cbRet) != SQL_SUCCESS) return(DispAllErrors(henv, hdbc, hstmt)); +//#endif if (structSQLTypeInfo.MaximumScale < 0) structSQLTypeInfo.MaximumScale = 0; @@ -657,7 +742,7 @@ void wxDB::Close(void) if (fpSqlLog) { fclose(fpSqlLog); - fpSqlLog = 0; //glt + fpSqlLog = 0; } // Free statement handle @@ -675,14 +760,44 @@ void wxDB::Close(void) if (SQLFreeConnect(hdbc) != SQL_SUCCESS) DispAllErrors(henv, hdbc); + // There should be zero Ctable objects still connected to this db object + assert(nTables == 0); + +#if __WXDEBUG__ > 0 + CstructTablesInUse *tiu; + wxNode *pNode; + pNode = TablesInUse.First(); + char s[80]; + char s2[80]; + while (pNode) + { + tiu = (CstructTablesInUse *)pNode->Data(); + if (tiu->pDb == this) + { + sprintf(s, "(%-20s) tableID:[%6lu] pDb:[%p]", tiu->tableName,tiu->tableID,tiu->pDb); + sprintf(s2,"Orphaned found using pDb:[%p]",this); + wxMessageBox (s,s2); + } + pNode = pNode->Next(); + } +#endif + + // Copy the error messages to a global variable + int i; + for (i = 0; i < DB_MAX_ERROR_HISTORY; i++) + strcpy(DBerrorList[i],errorList[i]); + } // wxDB::Close() /********** wxDB::CommitTrans() **********/ bool wxDB::CommitTrans(void) { - // Commit the transaction - if (SQLTransact(henv, hdbc, SQL_COMMIT) != SQL_SUCCESS) - return(DispAllErrors(henv, hdbc)); + if (this) + { + // Commit the transaction + if (SQLTransact(henv, hdbc, SQL_COMMIT) != SQL_SUCCESS) + return(DispAllErrors(henv, hdbc)); + } // Completed successfully return(TRUE); @@ -719,9 +834,13 @@ bool wxDB::DispAllErrors(HENV aHenv, HDBC aHdbc, HSTMT aHstmt) getchar(); #endif } + +#ifdef __WXDEBUG__ + wxMessageBox(odbcErrMsg); +#endif } - return(FALSE); // This function alway's returns false. + return(FALSE); // This function always returns false. } // wxDB::DispAllErrors() @@ -765,7 +884,8 @@ void wxDB::logError(char *errMsg, char *SQLState) if (++pLast == DB_MAX_ERROR_HISTORY) { - for (int i = 0; i < DB_MAX_ERROR_HISTORY; i++) + int i; + for (i = 0; i < DB_MAX_ERROR_HISTORY; i++) strcpy(errorList[i], errorList[i+1]); pLast--; } @@ -776,6 +896,9 @@ void wxDB::logError(char *errMsg, char *SQLState) if ((dbStatus = TranslateSqlState(SQLState)) != DB_ERR_FUNCTION_SEQUENCE_ERROR) DB_STATUS = dbStatus; + // Add the errmsg to the sql log + WriteSqlLog(errMsg); + } // wxDB::logError() /**********wxDB::TranslateSqlState() **********/ @@ -1018,33 +1141,13 @@ bool wxDB::Grant(int privileges, char *tableName, char *userList) } // wxDB::Grant() /********** wxDB::CreateView() **********/ -bool wxDB::CreateView(char *viewName, char *colList, char *pSqlStmt) +bool wxDB::CreateView(char *viewName, char *colList, char *pSqlStmt, bool attemptDrop) { char sqlStmt[DB_MAX_STATEMENT_LEN]; // Drop the view first - sprintf(sqlStmt, "DROP VIEW %s", viewName); - if (SQLExecDirect(hstmt, (UCHAR FAR *) sqlStmt, SQL_NTS) != SQL_SUCCESS) - { - // Check for sqlState = S0002, "Table or view not found". - // Ignore this error, bomb out on any other error. - // SQL Sybase Anwhere v5.5 returns an access violation error here - // (sqlstate = 42000) rather than an S0002. - GetNextError(henv, hdbc, hstmt); - if (strcmp(sqlState, "S0002") && strcmp(sqlState, "42000")) - { - DispNextError(); - DispAllErrors(henv, hdbc, hstmt); - RollbackTrans(); - return(FALSE); - } - } - - WriteSqlLog(sqlStmt); - -#ifdef DBDEBUG_CONSOLE - cout << endl << sqlStmt << endl; -#endif + if (attemptDrop && !DropView(viewName)) + return FALSE; // Build the create view statement strcpy(sqlStmt, "CREATE VIEW "); @@ -1070,9 +1173,54 @@ bool wxDB::CreateView(char *viewName, char *colList, char *pSqlStmt) } // wxDB::CreateView() +/********** wxDB::DropView() **********/ +bool wxDB::DropView(char *viewName) +{ + // NOTE: This function returns TRUE if the View does not exist, but + // only for identified databases. Code will need to be added + // below for any other databases when those databases are defined + // to handle this situation consistently + + char sqlStmt[DB_MAX_STATEMENT_LEN]; + + sprintf(sqlStmt, "DROP VIEW %s", viewName); + + WriteSqlLog(sqlStmt); + +#ifdef DBDEBUG_CONSOLE + cout << endl << sqlStmt << endl; +#endif + + if (SQLExecDirect(hstmt, (UCHAR FAR *) sqlStmt, SQL_NTS) != SQL_SUCCESS) + { + // Check for "Base table not found" error and ignore + GetNextError(henv, hdbc, hstmt); + if (strcmp(sqlState,"S0002")) // "Base table not found" + { + // Check for product specific error codes + if (!((Dbms() == dbmsSYBASE_ASA && !strcmp(sqlState,"42000")))) // 5.x (and lower?) + { + DispNextError(); + DispAllErrors(henv, hdbc, hstmt); + RollbackTrans(); + return(FALSE); + } + } + } + + // Commit the transaction + if (! CommitTrans()) + return(FALSE); + + return TRUE; + +} // wxDB::DropView() + + /********** wxDB::ExecSql() **********/ bool wxDB::ExecSql(char *pSqlStmt) { + SQLFreeStmt(hstmt, SQL_CLOSE); if (SQLExecDirect(hstmt, (UCHAR FAR *) pSqlStmt, SQL_NTS) == SQL_SUCCESS) return(TRUE); else @@ -1083,6 +1231,35 @@ bool wxDB::ExecSql(char *pSqlStmt) } // wxDB::ExecSql() +/********** wxDB::GetNext() **********/ +bool wxDB::GetNext(void) +{ + if (SQLFetch(hstmt) == SQL_SUCCESS) + return(TRUE); + else + { + DispAllErrors(henv, hdbc, hstmt); + return(FALSE); + } + +} // wxDB::GetNext() + +/********** wxDB::GetData() **********/ +bool wxDB::GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned) +{ + assert(pData); + assert(cbReturned); + + if (SQLGetData(hstmt, colNo, cType, pData, maxLen, cbReturned) == SQL_SUCCESS) + return(TRUE); + else + { + DispAllErrors(henv, hdbc, hstmt); + return(FALSE); + } + +} // wxDB::GetData() + /********** wxDB::GetColumns() **********/ /* * 1) The last array element of the tableName[] argument must be zero (null). @@ -1092,7 +1269,7 @@ bool wxDB::ExecSql(char *pSqlStmt) * CALLING FUNCTION IS RESPONSIBLE FOR DELETING THE MEMORY RETURNED WHEN IT * IS FINISHED WITH IT. i.e. * - * CcolInf *colInf = pDb->GetColumns(tableList); + * CcolInf *colInf = pDb->GetColumns(tableList, userID); * if (colInf) * { * // Use the column inf @@ -1101,7 +1278,7 @@ bool wxDB::ExecSql(char *pSqlStmt) * delete [] colInf; * } */ -CcolInf *wxDB::GetColumns(char *tableName[]) +CcolInf *wxDB::GetColumns(char *tableName[], char *userID) { UINT noCols = 0; UINT colNo = 0; @@ -1111,11 +1288,32 @@ CcolInf *wxDB::GetColumns(char *tableName[]) char tblName[DB_MAX_TABLE_NAME_LEN+1]; char colName[DB_MAX_COLUMN_NAME_LEN+1]; SWORD sqlDataType; + char userIdUC[80+1]; + char tableNameUC[DB_MAX_TABLE_NAME_LEN+1]; + + if (!userID || !strlen(userID)) + userID = uid; + + // dBase does not use user names, and some drivers fail if you try to pass one + if (Dbms() == dbmsDBASE) + userID = ""; + + // Oracle user names may only be in uppercase, so force + // the name to uppercase + if (Dbms() == dbmsORACLE) + { + int i = 0; + for (char *p = userID; *p; p++) + userIdUC[i++] = toupper(*p); + userIdUC[i] = 0; + userID = userIdUC; + } // Pass 1 - Determine how many columns there are. // Pass 2 - Allocate the CcolInf array and fill in // the array with the column information. - for (int pass = 1; pass <= 2; pass++) + int pass; + for (pass = 1; pass <= 2; pass++) { if (pass == 2) { @@ -1131,19 +1329,50 @@ CcolInf *wxDB::GetColumns(char *tableName[]) colInf[noCols].sqlDataType = 0; } // Loop through each table name - for (int tbl = 0; tableName[tbl]; tbl++) + int tbl; + for (tbl = 0; tableName[tbl]; tbl++) { + // Oracle table names are uppercase only, so force + // the name to uppercase just in case programmer forgot to do this + if (Dbms() == dbmsORACLE) + { + int i = 0; + for (char *p = tableName[tbl]; *p; p++) + tableNameUC[i++] = toupper(*p); + tableNameUC[i] = 0; + } + else + sprintf(tableNameUC,tableName[tbl]); + SQLFreeStmt(hstmt, SQL_CLOSE); - retcode = SQLColumns(hstmt, - NULL, 0, // All qualifiers - NULL, 0, // All owners - (UCHAR *) tableName[tbl], SQL_NTS, - NULL, 0); // All columns + + // MySQL and Access cannot accept a user name when looking up column names, so we + // use the call below that leaves out the user name + if (strcmp(userID,"") && + Dbms() != dbmsMY_SQL && + Dbms() != dbmsACCESS) + { + retcode = SQLColumns(hstmt, + NULL, 0, // All qualifiers + (UCHAR *) userID, SQL_NTS, // Owner + (UCHAR *) tableNameUC, SQL_NTS, + NULL, 0); // All columns + } + else + { + retcode = SQLColumns(hstmt, + NULL, 0, // All qualifiers + NULL, 0, // Owner + (UCHAR *) tableNameUC, SQL_NTS, + NULL, 0); // All columns + } if (retcode != SQL_SUCCESS) { // Error occured, abort DispAllErrors(henv, hdbc, hstmt); if (colInf) delete [] colInf; + SQLFreeStmt(hstmt, SQL_UNBIND); + SQLFreeStmt(hstmt, SQL_CLOSE); return(0); } SQLBindCol(hstmt, 3, SQL_C_CHAR, (UCHAR*) tblName, DB_MAX_TABLE_NAME_LEN+1, &cb); @@ -1169,11 +1398,14 @@ CcolInf *wxDB::GetColumns(char *tableName[]) DispAllErrors(henv, hdbc, hstmt); if (colInf) delete [] colInf; + SQLFreeStmt(hstmt, SQL_UNBIND); + SQLFreeStmt(hstmt, SQL_CLOSE); return(0); } } } + SQLFreeStmt(hstmt, SQL_UNBIND); SQLFreeStmt(hstmt, SQL_CLOSE); return colInf; @@ -1183,7 +1415,6 @@ CcolInf *wxDB::GetColumns(char *tableName[]) /********** wxDB::Catalog() **********/ bool wxDB::Catalog(char *userID, char *fileName) { - assert(userID && strlen(userID)); assert(fileName && strlen(fileName)); RETCODE retcode; @@ -1192,7 +1423,7 @@ bool wxDB::Catalog(char *userID, char *fileName) char tblNameSave[DB_MAX_TABLE_NAME_LEN+1]; char colName[DB_MAX_COLUMN_NAME_LEN+1]; SWORD sqlDataType; - char typeName[16]; + char typeName[30+1]; SWORD precision, length; FILE *fp = fopen(fileName,"wt"); @@ -1201,17 +1432,37 @@ bool wxDB::Catalog(char *userID, char *fileName) SQLFreeStmt(hstmt, SQL_CLOSE); - int i = 0; - char userIdUC[81]; - for (char *p = userID; *p; p++) - userIdUC[i++] = toupper(*p); - userIdUC[i] = 0; - - retcode = SQLColumns(hstmt, - NULL, 0, // All qualifiers - (UCHAR *) userIdUC, SQL_NTS, // User specified - NULL, 0, // All tables - NULL, 0); // All columns + if (!userID || !strlen(userID)) + userID = uid; + + char userIdUC[80+1]; + // Oracle user names may only be in uppercase, so force + // the name to uppercase + if (Dbms() == dbmsORACLE) + { + int i = 0; + for (char *p = userID; *p; p++) + userIdUC[i++] = toupper(*p); + userIdUC[i] = 0; + userID = userIdUC; + } + + if (strcmp(userID,"")) + { + retcode = SQLColumns(hstmt, + NULL, 0, // All qualifiers + (UCHAR *) userID, SQL_NTS, // User specified + NULL, 0, // All tables + NULL, 0); // All columns + } + else + { + retcode = SQLColumns(hstmt, + NULL, 0, // All qualifiers + NULL, 0, // User specified + NULL, 0, // All tables + NULL, 0); // All columns + } if (retcode != SQL_SUCCESS) { DispAllErrors(henv, hdbc, hstmt); @@ -1219,10 +1470,10 @@ bool wxDB::Catalog(char *userID, char *fileName) return(FALSE); } - SQLBindCol(hstmt, 3, SQL_C_CHAR, (UCHAR*) tblName, DB_MAX_TABLE_NAME_LEN+1, &cb); - SQLBindCol(hstmt, 4, SQL_C_CHAR, (UCHAR*) colName, DB_MAX_COLUMN_NAME_LEN+1, &cb); + SQLBindCol(hstmt, 3, SQL_C_CHAR, (UCHAR*) tblName, DB_MAX_TABLE_NAME_LEN+1, &cb); + SQLBindCol(hstmt, 4, SQL_C_CHAR, (UCHAR*) colName, DB_MAX_COLUMN_NAME_LEN+1, &cb); SQLBindCol(hstmt, 5, SQL_C_SSHORT, (UCHAR*) &sqlDataType, 0, &cb); - SQLBindCol(hstmt, 6, SQL_C_CHAR, (UCHAR*) typeName, 16, &cb); + SQLBindCol(hstmt, 6, SQL_C_CHAR, (UCHAR*) typeName, sizeof(typeName), &cb); SQLBindCol(hstmt, 7, SQL_C_SSHORT, (UCHAR*) &precision, 0, &cb); SQLBindCol(hstmt, 8, SQL_C_SSHORT, (UCHAR*) &length, 0, &cb); @@ -1255,6 +1506,8 @@ bool wxDB::Catalog(char *userID, char *fileName) tblName, colName, sqlDataType, typeName, precision, length); if (fputs(outStr, fp) == EOF) { + SQLFreeStmt(hstmt, SQL_UNBIND); + SQLFreeStmt(hstmt, SQL_CLOSE); fclose(fp); return(FALSE); } @@ -1262,15 +1515,13 @@ bool wxDB::Catalog(char *userID, char *fileName) } if (retcode != SQL_NO_DATA_FOUND) - { DispAllErrors(henv, hdbc, hstmt); - fclose(fp); - return(FALSE); - } + SQLFreeStmt(hstmt, SQL_UNBIND); SQLFreeStmt(hstmt, SQL_CLOSE); + fclose(fp); - return(TRUE); + return(retcode == SQL_NO_DATA_FOUND); } // wxDB::Catalog() @@ -1279,20 +1530,78 @@ bool wxDB::Catalog(char *userID, char *fileName) // if the object exists in the database. This function does not indicate // whether or not the user has privleges to query or perform other functions // on the table. -bool wxDB::TableExists(char *tableName) +bool wxDB::TableExists(char *tableName, char *userID, char *tablePath) { assert(tableName && strlen(tableName)); + if (Dbms() == dbmsDBASE) + { + wxString dbName; + if (tablePath && strlen(tablePath)) + dbName.sprintf("%s/%s.dbf",tablePath,tableName); + else + dbName.sprintf("%s.dbf",tableName); + bool glt; + glt = wxFileExists(dbName.GetData()); + return glt; + } + + if (!userID || !strlen(userID)) + userID = uid; + + char userIdUC[80+1]; + // Oracle user names may only be in uppercase, so force + // the name to uppercase + if (Dbms() == dbmsORACLE) + { + int i = 0; + for (char *p = userID; *p; p++) + userIdUC[i++] = toupper(*p); + userIdUC[i] = 0; + userID = userIdUC; + } + + char tableNameUC[DB_MAX_TABLE_NAME_LEN+1]; + // Oracle table names are uppercase only, so force + // the name to uppercase just in case programmer forgot to do this + if (Dbms() == dbmsORACLE) + { + int i = 0; + for (char *p = tableName; *p; p++) + tableNameUC[i++] = toupper(*p); + tableNameUC[i] = 0; + } + else + sprintf(tableNameUC,tableName); + SQLFreeStmt(hstmt, SQL_CLOSE); - RETCODE retcode = SQLTables(hstmt, - NULL, 0, // All qualifiers - NULL, 0, // All owners - (UCHAR FAR *)tableName, SQL_NTS, - NULL, 0); // All table types + RETCODE retcode; + + // MySQL and Access cannot accept a user name when looking up table names, so we + // use the call below that leaves out the user name + if (strcmp(userID,"") && + Dbms() != dbmsMY_SQL && + Dbms() != dbmsACCESS) + { + retcode = SQLTables(hstmt, + NULL, 0, // All qualifiers + (UCHAR *) userID, SQL_NTS, // All owners + (UCHAR FAR *)tableNameUC, SQL_NTS, + NULL, 0); // All table types + } + else + { + retcode = SQLTables(hstmt, + NULL, 0, // All qualifiers + NULL, 0, // All owners + (UCHAR FAR *)tableNameUC, SQL_NTS, + NULL, 0); // All table types + } if (retcode != SQL_SUCCESS) return(DispAllErrors(henv, hdbc, hstmt)); - if (SQLFetch(hstmt) != SQL_SUCCESS) + retcode = SQLFetch(hstmt); + if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO) { SQLFreeStmt(hstmt, SQL_CLOSE); return(DispAllErrors(henv, hdbc, hstmt)); @@ -1352,8 +1661,75 @@ bool wxDB::WriteSqlLog(char *logMsg) } // wxDB::WriteSqlLog() +/********** wxDB::Dbms() **********/ +/* + * Be aware that not all database engines use the exact same syntax, and not + * every ODBC compliant database is compliant to the same level of compliancy. + * Some manufacturers support the minimum Level 1 compliancy, and others up + * through Level 3. Others support subsets of features for levels above 1. + * + * If you find an inconsistency between the wxDB class and a specific database + * engine, and an identifier to this section, and special handle the database in + * the area where behavior is non-conforming with the other databases. + * + * + * NOTES ABOUT ISSUES SPECIFIC TO EACH DATABASE ENGINE + * --------------------------------------------------- + * + * ORACLE + * - Currently the only database supported by the class to support VIEWS + * + * DBASE + * - Does not support the SQL_TIMESTAMP structure + * - Supports only one cursor and one connect (apparently? with Microsoft driver only?) + * - Does not automatically create the primary index if the 'keyField' param of SetColDef + * is TRUE. The user must create ALL indexes from their program. + * - Table names can only be 8 characters long + * - Column names can only be 10 characters long + * + * SYBASE (all) + * - To lock a record during QUERY functions, the reserved word 'HOLDLOCK' must be added + * after every table name involved in the query/join if that tables matching record(s) + * are to be locked + * - Ignores the keywords 'FOR UPDATE'. Use the HOLDLOCK functionality described above + * + * SYBASE (Enterprise) + * - If a column is part of the Primary Key, the column cannot be NULL + * + * MY_SQL + * - If a column is part of the Primary Key, the column cannot be NULL + * - Cannot support selecting for update [::CanSelectForUpdate()]. Always returns FALSE + * + * POSTGRES + * - Does not support the keywords 'ASC' or 'DESC' as of release v6.5.0 + * + * + */ +DBMS wxDB::Dbms(void) +{ + if (!strnicmp(dbInf.dbmsName,"Oracle",6)) + return(dbmsORACLE); + if (!stricmp(dbInf.dbmsName,"Adaptive Server Anywhere")) + return(dbmsSYBASE_ASA); + if (!stricmp(dbInf.dbmsName,"SQL Server")) // Sybase Adaptive Server Enterprise + return(dbmsSYBASE_ASE); + if (!stricmp(dbInf.dbmsName,"Microsoft SQL Server")) + return(dbmsMS_SQL_SERVER); + if (!stricmp(dbInf.dbmsName,"MySQL")) + return(dbmsMY_SQL); + if (!stricmp(dbInf.dbmsName,"PostgreSQL")) // v6.5.0 + return(dbmsPOSTGRES); + if (!stricmp(dbInf.dbmsName,"ACCESS")) + return(dbmsACCESS); + if (!strnicmp(dbInf.dbmsName,"DBASE",5)) + return(dbmsDBASE); + return(dbmsUNIDENTIFIED); + +} // wxDB::Dbms() + + /********** GetDbConnection() **********/ -wxDB* WXDLLEXPORT GetDbConnection(DbStuff *pDbStuff) +wxDB WXDLLEXPORT *GetDbConnection(DbStuff *pDbStuff) { DbList *pList; @@ -1396,7 +1772,10 @@ wxDB* WXDLLEXPORT GetDbConnection(DbStuff *pDbStuff) // Connect to the datasource if (pList->PtrDb->Open(pDbStuff->Dsn, pDbStuff->Uid, pDbStuff->AuthStr)) + { + pList->PtrDb->SqlLog(SQLLOGstate,SQLLOGfn,TRUE); return(pList->PtrDb); + } else // Unable to connect, destroy list item { if (pList->PtrPrev) @@ -1466,6 +1845,26 @@ int WXDLLEXPORT NumberDbConnectionsInUse(void) } // NumberDbConnectionsInUse() +/********** SqlLog() **********/ +bool SqlLog(enum sqlLog state, char *filename) +{ + bool append = FALSE; + DbList *pList; + + for (pList = PtrBegDbList; pList; pList = pList->PtrNext) + { + if (!pList->PtrDb->SqlLog(state,filename,append)) + return(FALSE); + append = TRUE; + } + + SQLLOGstate = state; + strcpy(SQLLOGfn,filename); + + return(TRUE); + +} // SqlLog() + /********** GetDataSource() **********/ bool GetDataSource(HENV henv, char *Dsn, SWORD DsnMax, char *DsDesc, SWORD DsDescMax, UWORD direction)