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cpl_odbc.h
Go to the documentation of this file.
1 /******************************************************************************
2 * $Id$
3 *
4 * Project: OGR ODBC Driver
5 * Purpose: Declarations for ODBC Access Cover API.
6 * Author: Frank Warmerdam, warmerdam@pobox.com
7 *
8 ******************************************************************************
9 * Copyright (c) 2003, Frank Warmerdam
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 * DEALINGS IN THE SOFTWARE.
28 ****************************************************************************/
29
30 #ifndef CPL_ODBC_H_INCLUDED
31 #define CPL_ODBC_H_INCLUDED
32
33 #include "cpl_port.h"
34
35 #ifdef WIN32
36 # include <windows.h>
37 #endif
38
39 #include <sql.h>
40 #include <sqlext.h>
41 #include <odbcinst.h>
42 #include "cpl_string.h"
43
45 #ifdef PATH_MAX
46 # define ODBC_FILENAME_MAX PATH_MAX
47 #else
48 # define ODBC_FILENAME_MAX (255 + 1) /* Max path length */
49 #endif
50
61 class CPL_DLL CPLODBCDriverInstaller
62 {
63 char m_szPathOut[ODBC_FILENAME_MAX];
64 char m_szError[SQL_MAX_MESSAGE_LENGTH];
65 DWORD m_nErrorCode;
66 DWORD m_nUsageCount;
67
68 public:
69
70 // Default constructor.
71 CPLODBCDriverInstaller();
72
90 int InstallDriver( const char* pszDriver, const char* pszPathIn,
91 WORD fRequest = ODBC_INSTALL_COMPLETE );
92
109 int RemoveDriver( const char* pszDriverName, int fRemoveDSN = FALSE );
110
112 int GetUsageCount() const { return m_nUsageCount; }
113
118 const char* GetPathOut() const { return m_szPathOut; }
119
124 const char* GetLastError() const { return m_szError; }
125
131 DWORD GetLastErrorCode() const { return m_nErrorCode; }
132 };
133
134 class CPLODBCStatement;
135
136 /* On MSVC SQLULEN is missing in some cases (i.e. VC6)
137 ** but it is always a #define so test this way. On Unix
138 ** it is a typedef so we can't always do this.
139 */
140 #if defined(_MSC_VER) && !defined(SQLULEN) && !defined(_WIN64)
141 # define MISSING_SQLULEN
142 #endif
143
145 #if !defined(MISSING_SQLULEN)
146 /* ODBC types to support 64 bit compilation */
147 # define CPL_SQLULEN SQLULEN
148 # define CPL_SQLLEN SQLLEN
149 #else
150 # define CPL_SQLULEN SQLUINTEGER
151 # define CPL_SQLLEN SQLINTEGER
152 #endif /* ifdef SQLULEN */
153
161 class CPL_DLL CPLODBCSession {
162
163 CPL_DISALLOW_COPY_ASSIGN(CPLODBCSession)
164
165 CPLString m_osLastError{};
166 HENV m_hEnv = nullptr;
167 HDBC m_hDBC = nullptr;
168 int m_bInTransaction = false;
169 int m_bAutoCommit = true;
170
171 public:
172 CPLODBCSession();
173 ~CPLODBCSession();
174
175 int EstablishSession( const char *pszDSN,
176 const char *pszUserid,
177 const char *pszPassword );
178 const char *GetLastError();
179
180 // Transaction handling
181
182 int ClearTransaction();
183 int BeginTransaction();
184 int CommitTransaction();
185 int RollbackTransaction();
187 int IsInTransaction() { return m_bInTransaction; }
188
189 // Essentially internal.
190
191 int CloseSession();
192
193 int Failed( int, HSTMT = nullptr );
195 HDBC GetConnection() { return m_hDBC; }
197 HENV GetEnvironment() { return m_hEnv; }
198
199 bool ConnectToMsAccess( const char * pszName, const char* pszDSNStringTemplate );
200
201 };
202
212 class CPL_DLL CPLODBCStatement {
213
214 CPL_DISALLOW_COPY_ASSIGN(CPLODBCStatement)
215
216 CPLODBCSession *m_poSession = nullptr;
217 HSTMT m_hStmt = nullptr;
218
219 SQLSMALLINT m_nColCount = 0;
220 char **m_papszColNames = nullptr;
221 SQLSMALLINT *m_panColType = nullptr;
222 char **m_papszColTypeNames = nullptr;
223 CPL_SQLULEN *m_panColSize = nullptr;
224 SQLSMALLINT *m_panColPrecision = nullptr;
225 SQLSMALLINT *m_panColNullable = nullptr;
226 char **m_papszColColumnDef = nullptr;
227
228 char **m_papszColValues = nullptr;
229 CPL_SQLLEN *m_panColValueLengths = nullptr;
230
231 int Failed( int );
232
233 char *m_pszStatement = nullptr;
234 size_t m_nStatementMax = 0;
235 size_t m_nStatementLen = 0;
236
237 public:
238 explicit CPLODBCStatement( CPLODBCSession * );
239 ~CPLODBCStatement();
240
242 HSTMT GetStatement() { return m_hStmt; }
243
244 // Command buffer related.
245 void Clear();
246 void AppendEscaped( const char * );
247 void Append( const char * );
248 void Append( int );
249 void Append( double );
250 int Appendf( CPL_FORMAT_STRING(const char *), ... ) CPL_PRINT_FUNC_FORMAT (2, 3);
252 const char *GetCommand() { return m_pszStatement; }
253
254 int ExecuteSQL( const char * = nullptr );
255
256 // Results fetching
257 int Fetch( int nOrientation = SQL_FETCH_NEXT,
258 int nOffset = 0 );
259 void ClearColumnData();
260
261 int GetColCount();
262 const char *GetColName( int );
263 short GetColType( int );
264 const char *GetColTypeName( int );
265 short GetColSize( int );
266 short GetColPrecision( int );
267 short GetColNullable( int );
268 const char *GetColColumnDef( int );
269
270 int GetColId( const char * );
271 const char *GetColData( int, const char * = nullptr );
272 const char *GetColData( const char *, const char * = nullptr );
273 int GetColDataLength( int );
274 int GetRowCountAffected();
275
276 // Fetch special metadata.
277 int GetColumns( const char *pszTable,
278 const char *pszCatalog = nullptr,
279 const char *pszSchema = nullptr );
280 int GetPrimaryKeys( const char *pszTable,
281 const char *pszCatalog = nullptr,
282 const char *pszSchema = nullptr );
283
284 int GetTables( const char *pszCatalog = nullptr,
285 const char *pszSchema = nullptr );
286
287 void DumpResult( FILE *fp, int bShowSchema = FALSE );
288
289 static CPLString GetTypeName( int );
290 static SQLSMALLINT GetTypeMapping( SQLSMALLINT );
291
292 int CollectResultsInfo();
293 };
294
295 #endif
CPLODBCSession::IsInTransaction
int IsInTransaction()
Returns whether a transaction is active.
Definition: cpl_odbc.h:187
cpl_port.h
Core portability definitions for CPL.
CPLODBCSession
A class representing an ODBC database session.
Definition: cpl_odbc.h:161
CPLODBCDriverInstaller::GetLastError
const char * GetLastError() const
If InstallDriver returns FALSE, then GetLastError then error message can be obtained by calling this ...
Definition: cpl_odbc.h:124
CPLODBCDriverInstaller::GetUsageCount
int GetUsageCount() const
The usage count of the driver after this function has been called.
Definition: cpl_odbc.h:112
CPLODBCSession::GetConnection
HDBC GetConnection()
Return connection handle.
Definition: cpl_odbc.h:195
CPLString
Convenient string class based on std::string.
Definition: cpl_string.h:332
CPL_PRINT_FUNC_FORMAT
#define CPL_PRINT_FUNC_FORMAT(format_idx, arg_idx)
Tag a function to have printf() formatting.
Definition: cpl_port.h:921
CPLODBCDriverInstaller::GetLastErrorCode
DWORD GetLastErrorCode() const
If InstallDriver returns FALSE, then GetLastErrorCode then error code can be obtained by calling this...
Definition: cpl_odbc.h:131
CPLODBCStatement
Abstraction for statement, and resultset.
Definition: cpl_odbc.h:212
cpl_string.h
Various convenience functions for working with strings and string lists.
CPLODBCDriverInstaller
A class providing functions to install or remove ODBC driver.
Definition: cpl_odbc.h:61
CPLODBCSession::GetEnvironment
HENV GetEnvironment()
Return GetEnvironment handle.
Definition: cpl_odbc.h:197
CPLODBCStatement::GetStatement
HSTMT GetStatement()
Return statement handle.
Definition: cpl_odbc.h:242
CPL_FORMAT_STRING
#define CPL_FORMAT_STRING(arg)
Macro into which to wrap the format argument of a printf-like function.
Definition: cpl_port.h:936
CPLODBCStatement::GetCommand
const char * GetCommand()
Return statement string.
Definition: cpl_odbc.h:252
CPLODBCDriverInstaller::GetPathOut
const char * GetPathOut() const
Path of the target directory where the driver should be installed.
Definition: cpl_odbc.h:118
CPL_DISALLOW_COPY_ASSIGN
#define CPL_DISALLOW_COPY_ASSIGN(ClassName)
Helper to remove the copy and assignment constructors so that the compiler will not generate the defa...
Definition: cpl_port.h:1007