aa277f4ce2
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3938 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
463 lines
18 KiB
C++
463 lines
18 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: db.h
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// Purpose: Header file wxDB class. The wxDB class represents a connection
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// to an ODBC data source. The wxDB class allows operations on the data
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// source such as opening and closing the data source.
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// Author: Doug Card
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// Modified by:
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// Mods: Dec, 1998:
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// -Added support for SQL statement logging and database cataloging
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// April, 1999
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// -Added QUERY_ONLY mode support to reduce default number of cursors
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// -Added additional SQL logging code
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// -Added DEBUG-ONLY tracking of Ctable objects to detect orphaned DB connections
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// -Set ODBC option to only read committed writes to the DB so all
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// databases operate the same in that respect
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//
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// Created: 9.96
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// RCS-ID: $Id$
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// Copyright: (c) 1996 Remstar International, Inc.
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// Licence: wxWindows licence, plus:
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// Notice: This class library and its intellectual design are free of charge for use,
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// modification, enhancement, debugging under the following conditions:
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// 1) These classes may only be used as part of the implementation of a
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// wxWindows-based application
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// 2) All enhancements and bug fixes are to be submitted back to the wxWindows
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// user groups free of all charges for use with the wxWindows library.
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// 3) These classes may not be distributed as part of any other class library,
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// DLL, text (written or electronic), other than a complete distribution of
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// the wxWindows GUI development toolkit.
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//
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///////////////////////////////////////////////////////////////////////////////
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/*
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// SYNOPSIS START
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// SYNOPSIS STOP
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*/
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#ifndef DB_DOT_H
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#define DB_DOT_H
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// Use this line for wxWindows v1.x
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//#include "wx_ver.h"
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// Use this line for wxWindows v2.x
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#include "wx/version.h"
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#if wxMAJOR_VERSION == 2
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#ifdef __GNUG__
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#pragma interface "db.h"
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#endif
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#include "wx/filefn.h"
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#endif
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#if defined(wx_msw) || defined(__WXMSW__) || defined(WIN32)
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#include <windows.h>
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#endif
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#ifdef __UNIX__
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#if wxMAJOR_VERSION == 2
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extern "C" {
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#include "../../src/iodbc/isql.h"
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#include "../../src/iodbc/isqlext.h"
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}
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#else // version == 1
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extern "C" {
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#include "iodbc.h"
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#include "isqlext.h"
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}
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#endif
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typedef float SFLOAT;
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typedef double SDOUBLE;
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typedef unsigned int UINT;
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#define ULONG UDWORD
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#else // msw
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#define ODBCVER 0x0250
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#include <sql.h>
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#include <sqlext.h>
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#endif
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#ifdef __UNIX__
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# ifndef strnicmp
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# define strnicmp strncasecmp
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# endif
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# ifndef stricmp
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# define stricmp strcasecmp
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# endif
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#else
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# include <io.h>
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#endif
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enum enumDummy {enumDum1};
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#define SQL_C_BOOLEAN(datatype) (sizeof(datatype) == 1 ? SQL_C_UTINYINT : (sizeof(datatype) == 2 ? SQL_C_USHORT : SQL_C_ULONG))
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// #define SQL_C_BOOLEAN (sizeof(Bool) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
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#define SQL_C_ENUM (sizeof(enumDummy) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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const int DB_PATH_MAX = 254;
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// Database Globals
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const int DB_TYPE_NAME_LEN = 40;
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const int DB_MAX_STATEMENT_LEN = 2048;
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const int DB_MAX_WHERE_CLAUSE_LEN = 1024;
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const int DB_MAX_ERROR_MSG_LEN = 512;
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const int DB_MAX_ERROR_HISTORY = 5;
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const int DB_MAX_TABLE_NAME_LEN = 128;
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const int DB_MAX_COLUMN_NAME_LEN = 128;
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const int DB_DATA_TYPE_VARCHAR = 1;
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const int DB_DATA_TYPE_INTEGER = 2;
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const int DB_DATA_TYPE_FLOAT = 3;
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const int DB_DATA_TYPE_DATE = 4;
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const int DB_SELECT_KEYFIELDS = 1;
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const int DB_SELECT_WHERE = 2;
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const int DB_SELECT_MATCHING = 3;
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const int DB_SELECT_STATEMENT = 4;
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const int DB_UPD_KEYFIELDS = 1;
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const int DB_UPD_WHERE = 2;
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const int DB_DEL_KEYFIELDS = 1;
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const int DB_DEL_WHERE = 2;
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const int DB_DEL_MATCHING = 3;
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const int DB_WHERE_KEYFIELDS = 1;
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const int DB_WHERE_MATCHING = 2;
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const int DB_GRANT_SELECT = 1;
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const int DB_GRANT_INSERT = 2;
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const int DB_GRANT_UPDATE = 4;
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const int DB_GRANT_DELETE = 8;
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const int DB_GRANT_ALL = DB_GRANT_SELECT | DB_GRANT_INSERT | DB_GRANT_UPDATE | DB_GRANT_DELETE;
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// ODBC Error codes (derived from ODBC SqlState codes)
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enum ODBC_ERRORS
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{
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DB_FAILURE = 0,
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DB_SUCCESS = 1,
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DB_ERR_NOT_IN_USE,
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DB_ERR_GENERAL_WARNING, // SqlState = '01000'
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DB_ERR_DISCONNECT_ERROR, // SqlState = '01002'
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DB_ERR_DATA_TRUNCATED, // SqlState = '01004'
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DB_ERR_PRIV_NOT_REVOKED, // SqlState = '01006'
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DB_ERR_INVALID_CONN_STR_ATTR, // SqlState = '01S00'
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DB_ERR_ERROR_IN_ROW, // SqlState = '01S01'
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DB_ERR_OPTION_VALUE_CHANGED, // SqlState = '01S02'
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DB_ERR_NO_ROWS_UPD_OR_DEL, // SqlState = '01S03'
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DB_ERR_MULTI_ROWS_UPD_OR_DEL, // SqlState = '01S04'
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DB_ERR_WRONG_NO_OF_PARAMS, // SqlState = '07001'
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DB_ERR_DATA_TYPE_ATTR_VIOL, // SqlState = '07006'
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DB_ERR_UNABLE_TO_CONNECT, // SqlState = '08001'
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DB_ERR_CONNECTION_IN_USE, // SqlState = '08002'
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DB_ERR_CONNECTION_NOT_OPEN, // SqlState = '08003'
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DB_ERR_REJECTED_CONNECTION, // SqlState = '08004'
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DB_ERR_CONN_FAIL_IN_TRANS, // SqlState = '08007'
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DB_ERR_COMM_LINK_FAILURE, // SqlState = '08S01'
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DB_ERR_INSERT_VALUE_LIST_MISMATCH, // SqlState = '21S01'
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DB_ERR_DERIVED_TABLE_MISMATCH, // SqlState = '21S02'
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DB_ERR_STRING_RIGHT_TRUNC, // SqlState = '22001'
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DB_ERR_NUMERIC_VALUE_OUT_OF_RNG, // SqlState = '22003'
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DB_ERR_ERROR_IN_ASSIGNMENT, // SqlState = '22005'
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DB_ERR_DATETIME_FLD_OVERFLOW, // SqlState = '22008'
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DB_ERR_DIVIDE_BY_ZERO, // SqlState = '22012'
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DB_ERR_STR_DATA_LENGTH_MISMATCH, // SqlState = '22026'
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DB_ERR_INTEGRITY_CONSTRAINT_VIOL, // SqlState = '23000'
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DB_ERR_INVALID_CURSOR_STATE, // SqlState = '24000'
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DB_ERR_INVALID_TRANS_STATE, // SqlState = '25000'
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DB_ERR_INVALID_AUTH_SPEC, // SqlState = '28000'
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DB_ERR_INVALID_CURSOR_NAME, // SqlState = '34000'
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DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL, // SqlState = '37000'
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DB_ERR_DUPLICATE_CURSOR_NAME, // SqlState = '3C000'
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DB_ERR_SERIALIZATION_FAILURE, // SqlState = '40001'
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DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL2, // SqlState = '42000'
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DB_ERR_OPERATION_ABORTED, // SqlState = '70100'
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DB_ERR_UNSUPPORTED_FUNCTION, // SqlState = 'IM001'
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DB_ERR_NO_DATA_SOURCE, // SqlState = 'IM002'
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DB_ERR_DRIVER_LOAD_ERROR, // SqlState = 'IM003'
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DB_ERR_SQLALLOCENV_FAILED, // SqlState = 'IM004'
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DB_ERR_SQLALLOCCONNECT_FAILED, // SqlState = 'IM005'
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DB_ERR_SQLSETCONNECTOPTION_FAILED, // SqlState = 'IM006'
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DB_ERR_NO_DATA_SOURCE_DLG_PROHIB, // SqlState = 'IM007'
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DB_ERR_DIALOG_FAILED, // SqlState = 'IM008'
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DB_ERR_UNABLE_TO_LOAD_TRANSLATION_DLL, // SqlState = 'IM009'
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DB_ERR_DATA_SOURCE_NAME_TOO_LONG, // SqlState = 'IM010'
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DB_ERR_DRIVER_NAME_TOO_LONG, // SqlState = 'IM011'
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DB_ERR_DRIVER_KEYWORD_SYNTAX_ERROR, // SqlState = 'IM012'
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DB_ERR_TRACE_FILE_ERROR, // SqlState = 'IM013'
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DB_ERR_TABLE_OR_VIEW_ALREADY_EXISTS, // SqlState = 'S0001'
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DB_ERR_TABLE_NOT_FOUND, // SqlState = 'S0002'
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DB_ERR_INDEX_ALREADY_EXISTS, // SqlState = 'S0011'
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DB_ERR_INDEX_NOT_FOUND, // SqlState = 'S0012'
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DB_ERR_COLUMN_ALREADY_EXISTS, // SqlState = 'S0021'
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DB_ERR_COLUMN_NOT_FOUND, // SqlState = 'S0022'
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DB_ERR_NO_DEFAULT_FOR_COLUMN, // SqlState = 'S0023'
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DB_ERR_GENERAL_ERROR, // SqlState = 'S1000'
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DB_ERR_MEMORY_ALLOCATION_FAILURE, // SqlState = 'S1001'
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DB_ERR_INVALID_COLUMN_NUMBER, // SqlState = 'S1002'
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DB_ERR_PROGRAM_TYPE_OUT_OF_RANGE, // SqlState = 'S1003'
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DB_ERR_SQL_DATA_TYPE_OUT_OF_RANGE, // SqlState = 'S1004'
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DB_ERR_OPERATION_CANCELLED, // SqlState = 'S1008'
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DB_ERR_INVALID_ARGUMENT_VALUE, // SqlState = 'S1009'
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DB_ERR_FUNCTION_SEQUENCE_ERROR, // SqlState = 'S1010'
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DB_ERR_OPERATION_INVALID_AT_THIS_TIME, // SqlState = 'S1011'
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DB_ERR_INVALID_TRANS_OPERATION_CODE, // SqlState = 'S1012'
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DB_ERR_NO_CURSOR_NAME_AVAIL, // SqlState = 'S1015'
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DB_ERR_INVALID_STR_OR_BUF_LEN, // SqlState = 'S1090'
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DB_ERR_DESCRIPTOR_TYPE_OUT_OF_RANGE, // SqlState = 'S1091'
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DB_ERR_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1092'
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DB_ERR_INVALID_PARAM_NO, // SqlState = 'S1093'
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DB_ERR_INVALID_SCALE_VALUE, // SqlState = 'S1094'
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DB_ERR_FUNCTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1095'
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DB_ERR_INF_TYPE_OUT_OF_RANGE, // SqlState = 'S1096'
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DB_ERR_COLUMN_TYPE_OUT_OF_RANGE, // SqlState = 'S1097'
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DB_ERR_SCOPE_TYPE_OUT_OF_RANGE, // SqlState = 'S1098'
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DB_ERR_NULLABLE_TYPE_OUT_OF_RANGE, // SqlState = 'S1099'
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DB_ERR_UNIQUENESS_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1100'
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DB_ERR_ACCURACY_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1101'
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DB_ERR_DIRECTION_OPTION_OUT_OF_RANGE, // SqlState = 'S1103'
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DB_ERR_INVALID_PRECISION_VALUE, // SqlState = 'S1104'
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DB_ERR_INVALID_PARAM_TYPE, // SqlState = 'S1105'
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DB_ERR_FETCH_TYPE_OUT_OF_RANGE, // SqlState = 'S1106'
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DB_ERR_ROW_VALUE_OUT_OF_RANGE, // SqlState = 'S1107'
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DB_ERR_CONCURRENCY_OPTION_OUT_OF_RANGE, // SqlState = 'S1108'
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DB_ERR_INVALID_CURSOR_POSITION, // SqlState = 'S1109'
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DB_ERR_INVALID_DRIVER_COMPLETION, // SqlState = 'S1110'
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DB_ERR_INVALID_BOOKMARK_VALUE, // SqlState = 'S1111'
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DB_ERR_DRIVER_NOT_CAPABLE, // SqlState = 'S1C00'
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DB_ERR_TIMEOUT_EXPIRED // SqlState = 'S1T00'
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};
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struct DbStuff
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{
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HENV Henv;
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char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name
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char Uid[20+1]; // User ID
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char AuthStr[20+1]; // Authorization string (password)
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char description[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is
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char fileType[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is
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// Optionals needed for some databases like dBase
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char defaultDir[DB_PATH_MAX]; // Directory that db file resides in
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};
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typedef struct
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{
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char TypeName[DB_TYPE_NAME_LEN];
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int FsqlType;
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long Precision;
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short CaseSensitive;
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// short MinimumScale;
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short MaximumScale;
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} SqlTypeInfo;
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class WXDLLEXPORT CcolInf
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{
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public:
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char tableName[DB_MAX_TABLE_NAME_LEN+1];
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char colName[DB_MAX_COLUMN_NAME_LEN+1];
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int sqlDataType;
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};
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enum sqlLog
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{
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sqlLogOFF,
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sqlLogON
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};
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enum dbms
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{
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dbmsUNIDENTIFIED,
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dbmsORACLE,
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dbmsSYBASE_ASA, // Adaptive Server Anywhere
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dbmsSYBASE_ASE, // Adaptive Server Enterprise
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dbmsMS_SQL_SERVER,
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dbmsMY_SQL,
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dbmsPOSTGRES,
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dbmsACCESS,
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dbmsDBASE
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};
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typedef enum dbms DBMS;
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// The wxDB::errorList is copied to this variable when the wxDB object
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// is closed. This way, the error list is still available after the
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// database object is closed. This is necessary if the database
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// connection fails so the calling application can show the operator
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// why the connection failed. Note: as each wxDB object is closed, it
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// will overwrite the errors of the previously destroyed wxDB object in
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// this variable.
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extern char DBerrorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
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class WXDLLEXPORT wxDB
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{
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private:
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// Private data
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bool dbIsOpen;
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char *dsn; // Data source name
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char *uid; // User ID
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char *authStr; // Authorization string (password)
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FILE *fpSqlLog; // Sql Log file pointer
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enum sqlLog sqlLogState; // On or Off
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// Private member functions
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bool getDbInfo(void);
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bool getDataTypeInfo(SWORD fSqlType, SqlTypeInfo &structSQLTypeInfo);
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bool setConnectionOptions(void);
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void logError(char *errMsg, char *SQLState);
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public:
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// The following structure contains database information gathered from the
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// datasource when the datasource is first opened.
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struct
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{
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char dbmsName[40]; // Name of the dbms product
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char dbmsVer[64]; // Version # of the dbms product
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char driverName[40]; // Driver name
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char odbcVer[60]; // ODBC version of the driver
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char drvMgrOdbcVer[60]; // ODBC version of the driver manager
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char driverVer[60]; // Driver version
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char serverName[80]; // Server Name, typically a connect string
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char databaseName[128]; // Database filename
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char outerJoins[2]; // Indicates whether the data source supports outer joins
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char procedureSupport[2]; // Indicates whether the data source supports stored procedures
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UWORD maxConnections; // Maximum # of connections the data source supports
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UWORD maxStmts; // Maximum # of HSTMTs per HDBC
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UWORD apiConfLvl; // ODBC API conformance level
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UWORD cliConfLvl; // Indicates whether the data source is SAG compliant
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UWORD sqlConfLvl; // SQL conformance level
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UWORD cursorCommitBehavior; // Indicates how cursors are affected by a db commit
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UWORD cursorRollbackBehavior; // Indicates how cursors are affected by a db rollback
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UWORD supportNotNullClause; // Indicates if data source supports NOT NULL clause
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char supportIEF[2]; // Integrity Enhancement Facility (Referential Integrity)
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UDWORD txnIsolation; // Default transaction isolation level supported by the driver
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UDWORD txnIsolationOptions; // Transaction isolation level options available
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UDWORD fetchDirections; // Fetch directions supported
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UDWORD lockTypes; // Lock types supported in SQLSetPos
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UDWORD posOperations; // Position operations supported in SQLSetPos
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UDWORD posStmts; // Position statements supported
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UDWORD scrollConcurrency; // Concurrency control options supported for scrollable cursors
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UDWORD scrollOptions; // Scroll Options supported for scrollable cursors
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UDWORD staticSensitivity; // Indicates if additions, deletions and updates can be detected
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UWORD txnCapable; // Indicates if the data source supports transactions
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UDWORD loginTimeout; // Number seconds to wait for a login request
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} dbInf;
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// ODBC handles
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HENV henv; // ODBC Environment handle
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HDBC hdbc; // ODBC DB Connection handle
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HSTMT hstmt; // ODBC Statement handle
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// ODBC Error Inf.
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char sqlState[20];
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SDWORD nativeError;
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char errorMsg[SQL_MAX_MESSAGE_LENGTH];
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SWORD cbErrorMsg;
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char errorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
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int DB_STATUS;
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//Error reporting mode
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bool silent;
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// Number of Ctable objects connected to this db object
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unsigned int nTables;
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// Inf. about logical data types VARCHAR, INTEGER, FLOAT and DATE.
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// This inf. is obtained from the ODBC driver by use of the
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// SQLGetTypeInfo() function. The key piece of inf. is the
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// type name the data source uses for each logical data type.
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// e.g. VARCHAR; Oracle calls it VARCHAR2.
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SqlTypeInfo typeInfVarchar, typeInfInteger, typeInfFloat, typeInfDate;
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// Public member functions
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wxDB(HENV &aHenv);
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bool Open(char *Dsn, char *Uid, char *AuthStr); // Data Source Name, User ID, Password
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void Close(void);
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bool CommitTrans(void);
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bool RollbackTrans(void);
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bool DispAllErrors(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
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bool GetNextError(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
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void DispNextError(void);
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bool CreateView(char *viewName, char *colList, char *pSqlStmt, bool attemptDrop=TRUE);
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bool DropView(char *viewName);
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bool ExecSql(char *pSqlStmt);
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bool GetNext(void);
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bool GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned);
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bool Grant(int privileges, char *tableName, char *userList = "PUBLIC");
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int TranslateSqlState(char *SQLState);
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bool Catalog(char *userID, char *fileName = "Catalog.txt");
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CcolInf *GetColumns(char *tableName[], char *userID=NULL);
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char *GetDatabaseName(void) {return dbInf.dbmsName;}
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char *GetDataSource(void) {return dsn;}
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char *GetUsername(void) {return uid;}
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char *GetPassword(void) {return authStr;}
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bool IsOpen(void) {return dbIsOpen;}
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HENV GetHENV(void) {return henv;}
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HDBC GetHDBC(void) {return hdbc;}
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HSTMT GetHSTMT(void) {return hstmt;}
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bool TableExists(char *tableName, char *userID=NULL, char *path=NULL); // Table name can refer to a table, view, alias or synonym
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void LogError(char *errMsg, char *SQLState = 0) {logError(errMsg, SQLState);}
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bool SqlLog(enum sqlLog state, char *filename = "sqllog.txt", bool append = FALSE);
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bool WriteSqlLog(char *logMsg);
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DBMS Dbms(void);
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|
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}; // wxDB
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// This structure forms a node in a linked list. The linked list of "DbList" objects
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// keeps track of allocated database connections. This allows the application to
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// open more than one database connection through ODBC for multiple transaction support
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// or for multiple database support.
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|
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struct DbList
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|
{
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DbList *PtrPrev; // Pointer to previous item in the list
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char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name
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wxDB *PtrDb; // Pointer to the wxDB object
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|
bool Free; // Is item free or in use?
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|
DbList *PtrNext; // Pointer to next item in the list
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};
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|
|
|
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#if __WXDEBUG__ > 0
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#include "wx/object.h"
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class CstructTablesInUse : public wxObject
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|
{
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public:
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|
const char *tableName;
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|
ULONG tableID;
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|
class wxDB *pDb;
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|
}; // CstructTablesInUse
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|
#endif
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|
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|
// The following routines allow a user to get new database connections, free them
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|
// for other code segments to use, or close all of them when the application has
|
|
// completed.
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|
|
|
wxDB* WXDLLEXPORT GetDbConnection(DbStuff *pDbStuff);
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|
bool WXDLLEXPORT FreeDbConnection(wxDB *pDb);
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|
void WXDLLEXPORT CloseDbConnections(void);
|
|
int WXDLLEXPORT NumberDbConnectionsInUse(void);
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|
|
|
// This function sets the sql log state for all open wxDB objects
|
|
bool SqlLog(enum sqlLog state, char *filename = "sqllog.txt");
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|
|
|
// 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,
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|
UWORD direction = SQL_FETCH_NEXT);
|
|
|
|
#endif
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