[wxWidgets.git] / include / wx / db.h

///////////////////////////////////////////////////////////////////////////////
// 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
#endif

#if defined(wx_msw) || defined(__WXMSW__) || defined(WIN32)
#include <windows.h>
#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
#elif defined(__WXMAC__)
	extern "C" {
	#include "../../src/iodbc/isql.h"
	#include "../../src/iodbc/isqlext.h"
	}
	typedef float SFLOAT; 
	typedef double SDOUBLE; 
	typedef unsigned int UINT;
	#define ULONG UDWORD
#else  // msw
	#define ODBCVER 0x0250
	#include <sql.h>
	#include <sqlext.h>
#endif

#ifdef __UNIX__ 
/*
#   ifndef strnicmp 
#      define strnicmp strncasecmp 
#   endif 
#   ifndef stricmp 
#      define stricmp strcasecmp 
#   endif 
*/
#elif defined(__WXMAC__)
#else 
#   include <io.h> 
#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,
	dbmsINFORMIX
};

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(const char *errMsg, const 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(const char *viewName, const char *colList, const char *pSqlStmt, bool attemptDrop=TRUE);
	bool		 DropView(const char *viewName);
	bool		 ExecSql(const char *pSqlStmt);
	bool		 GetNext(void);
	bool		 GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned);
	bool	    Grant(int privileges, const char *tableName, const char *userList = "PUBLIC");
	int	    TranslateSqlState(const char *SQLState);
	bool		 Catalog(const char *userID, const char *fileName = "Catalog.txt");
	CcolInf	*GetColumns(char *tableName[], const 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(const char *tableName, const char *userID=NULL, const char *path=NULL);  // Table name can refer to a table, view, alias or synonym
	void		 LogError(const char *errMsg, const char *SQLState = 0) {logError(errMsg, SQLState);}
	bool		 SqlLog(enum sqlLog state, const char *filename = "sqllog.txt", bool append = FALSE);
	bool		 WriteSqlLog(const 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
};


#ifdef __WXDEBUG__
#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, const 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, const char *Dsn, SWORD DsnMax, const char *DsDesc, SWORD DsDescMax,
						 UWORD direction = SQL_FETCH_NEXT);

#endif
Commit	Line	Data
108106cf JS	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:
a2115c88 GT	8	// Mods: Dec, 1998:
	9	// -Added support for SQL statement logging and database cataloging
	10	// April, 1999
	11	// -Added QUERY_ONLY mode support to reduce default number of cursors
	12	// -Added additional SQL logging code
	13	// -Added DEBUG-ONLY tracking of Ctable objects to detect orphaned DB connections
	14	// -Set ODBC option to only read committed writes to the DB so all
	15	// databases operate the same in that respect
	16	//
108106cf JS	17	// Created: 9.96
	18	// RCS-ID: $Id$
	19	// Copyright: (c) 1996 Remstar International, Inc.
	20	// Licence: wxWindows licence, plus:
a2115c88	21	// Notice: This class library and its intellectual design are free of charge for use,
108106cf JS	22	// modification, enhancement, debugging under the following conditions:
	23	// 1) These classes may only be used as part of the implementation of a
	24	// wxWindows-based application
	25	// 2) All enhancements and bug fixes are to be submitted back to the wxWindows
	26	// user groups free of all charges for use with the wxWindows library.
	27	// 3) These classes may not be distributed as part of any other class library,
	28	// DLL, text (written or electronic), other than a complete distribution of
	29	// the wxWindows GUI development toolkit.
1fc5dd6f	30	//
108106cf JS	31	///////////////////////////////////////////////////////////////////////////////
	32
	33	/*
	34	// SYNOPSIS START
	35	// SYNOPSIS STOP
	36	*/
	37
	38	#ifndef DB_DOT_H
	39	#define DB_DOT_H
a2115c88 GT	40
	41	// Use this line for wxWindows v1.x
	42	//#include "wx_ver.h"
	43	// Use this line for wxWindows v2.x
	44	#include "wx/version.h"
	45
	46	#if wxMAJOR_VERSION == 2
	47	#ifdef __GNUG__
	48	#pragma interface "db.h"
	49	#endif
108106cf JS	50	#endif
108106cf JS	51
a2115c88	52	#if defined(wx_msw) \|\| defined(__WXMSW__) \|\| defined(WIN32)
108106cf JS	53	#include <windows.h>
	54	#endif
	55
aa277f4c	56	#ifdef __UNIX__
a2115c88 GT	57	#if wxMAJOR_VERSION == 2
	58	extern "C" {
	59	#include "../../src/iodbc/isql.h"
	60	#include "../../src/iodbc/isqlext.h"
	61	}
	62	#else // version == 1
	63	extern "C" {
	64	#include "iodbc.h"
	65	#include "isqlext.h"
	66	}
	67	#endif
	68	typedef float SFLOAT;
	69	typedef double SDOUBLE;
	70	typedef unsigned int UINT;
	71	#define ULONG UDWORD
e7549107 SC	72	#elif defined(__WXMAC__)
	73	extern "C" {
	74	#include "../../src/iodbc/isql.h"
	75	#include "../../src/iodbc/isqlext.h"
	76	}
	77	typedef float SFLOAT;
	78	typedef double SDOUBLE;
	79	typedef unsigned int UINT;
	80	#define ULONG UDWORD
a2115c88 GT	81	#else // msw
	82	#define ODBCVER 0x0250
	83	#include <sql.h>
	84	#include <sqlext.h>
	85	#endif
7e616b10	86
e7549107	87	#ifdef __UNIX__
e5ad8528	88	/*
d194ddf2 GT	89	# ifndef strnicmp
	90	# define strnicmp strncasecmp
	91	# endif
	92	# ifndef stricmp
	93	# define stricmp strcasecmp
	94	# endif
e5ad8528	95	*/
e7549107	96	#elif defined(__WXMAC__)
d194ddf2 GT	97	#else
d194ddf2 GT	98	# include <io.h>
a2115c88	99	#endif
7e616b10	100
a2115c88	101	enum enumDummy {enumDum1};
7e616b10	102
a2115c88 GT	103	#define SQL_C_BOOLEAN(datatype) (sizeof(datatype) == 1 ? SQL_C_UTINYINT : (sizeof(datatype) == 2 ? SQL_C_USHORT : SQL_C_ULONG))
a2115c88 GT	104	// #define SQL_C_BOOLEAN (sizeof(Bool) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
7e616b10	105
a2115c88	106	#define SQL_C_ENUM (sizeof(enumDummy) == 2 ? SQL_C_USHORT : SQL_C_ULONG)
108106cf	107
a2115c88 GT	108	#ifndef TRUE
a2115c88 GT	109	#define TRUE 1
7e616b10 RR	110	#endif
7e616b10 RR	111
a2115c88 GT	112	#ifndef FALSE
	113	#define FALSE 0
	114	#endif
108106cf	115
a2115c88	116	const int DB_PATH_MAX = 254;
108106cf	117
108106cf	118	// Database Globals
7e616b10	119	const int DB_TYPE_NAME_LEN = 40;
a2115c88 GT	120	const int DB_MAX_STATEMENT_LEN = 2048;
	121	const int DB_MAX_WHERE_CLAUSE_LEN = 1024;
	122	const int DB_MAX_ERROR_MSG_LEN = 512;
	123	const int DB_MAX_ERROR_HISTORY = 5;
7e616b10 RR	124	const int DB_MAX_TABLE_NAME_LEN = 128;
	125	const int DB_MAX_COLUMN_NAME_LEN = 128;
	126
a2115c88 GT	127	const int DB_DATA_TYPE_VARCHAR = 1;
a2115c88 GT	128	const int DB_DATA_TYPE_INTEGER = 2;
7e616b10	129	const int DB_DATA_TYPE_FLOAT = 3;
a2115c88	130	const int DB_DATA_TYPE_DATE = 4;
7e616b10 RR	131
	132	const int DB_SELECT_KEYFIELDS = 1;
	133	const int DB_SELECT_WHERE = 2;
	134	const int DB_SELECT_MATCHING = 3;
	135	const int DB_SELECT_STATEMENT = 4;
	136
	137	const int DB_UPD_KEYFIELDS = 1;
	138	const int DB_UPD_WHERE = 2;
	139
	140	const int DB_DEL_KEYFIELDS = 1;
	141	const int DB_DEL_WHERE = 2;
	142	const int DB_DEL_MATCHING = 3;
	143
	144	const int DB_WHERE_KEYFIELDS = 1;
a2115c88	145	const int DB_WHERE_MATCHING = 2;
7e616b10 RR	146
	147	const int DB_GRANT_SELECT = 1;
	148	const int DB_GRANT_INSERT = 2;
	149	const int DB_GRANT_UPDATE = 4;
	150	const int DB_GRANT_DELETE = 8;
	151	const int DB_GRANT_ALL = DB_GRANT_SELECT \| DB_GRANT_INSERT \| DB_GRANT_UPDATE \| DB_GRANT_DELETE;
108106cf JS	152
	153	// ODBC Error codes (derived from ODBC SqlState codes)
	154	enum ODBC_ERRORS
	155	{
a2115c88 GT	156	DB_FAILURE = 0,
a2115c88 GT	157	DB_SUCCESS = 1,
108106cf JS	158	DB_ERR_NOT_IN_USE,
	159	DB_ERR_GENERAL_WARNING, // SqlState = '01000'
	160	DB_ERR_DISCONNECT_ERROR, // SqlState = '01002'
	161	DB_ERR_DATA_TRUNCATED, // SqlState = '01004'
	162	DB_ERR_PRIV_NOT_REVOKED, // SqlState = '01006'
	163	DB_ERR_INVALID_CONN_STR_ATTR, // SqlState = '01S00'
	164	DB_ERR_ERROR_IN_ROW, // SqlState = '01S01'
	165	DB_ERR_OPTION_VALUE_CHANGED, // SqlState = '01S02'
	166	DB_ERR_NO_ROWS_UPD_OR_DEL, // SqlState = '01S03'
	167	DB_ERR_MULTI_ROWS_UPD_OR_DEL, // SqlState = '01S04'
	168	DB_ERR_WRONG_NO_OF_PARAMS, // SqlState = '07001'
	169	DB_ERR_DATA_TYPE_ATTR_VIOL, // SqlState = '07006'
	170	DB_ERR_UNABLE_TO_CONNECT, // SqlState = '08001'
	171	DB_ERR_CONNECTION_IN_USE, // SqlState = '08002'
	172	DB_ERR_CONNECTION_NOT_OPEN, // SqlState = '08003'
	173	DB_ERR_REJECTED_CONNECTION, // SqlState = '08004'
	174	DB_ERR_CONN_FAIL_IN_TRANS, // SqlState = '08007'
	175	DB_ERR_COMM_LINK_FAILURE, // SqlState = '08S01'
	176	DB_ERR_INSERT_VALUE_LIST_MISMATCH, // SqlState = '21S01'
	177	DB_ERR_DERIVED_TABLE_MISMATCH, // SqlState = '21S02'
	178	DB_ERR_STRING_RIGHT_TRUNC, // SqlState = '22001'
	179	DB_ERR_NUMERIC_VALUE_OUT_OF_RNG, // SqlState = '22003'
	180	DB_ERR_ERROR_IN_ASSIGNMENT, // SqlState = '22005'
	181	DB_ERR_DATETIME_FLD_OVERFLOW, // SqlState = '22008'
	182	DB_ERR_DIVIDE_BY_ZERO, // SqlState = '22012'
	183	DB_ERR_STR_DATA_LENGTH_MISMATCH, // SqlState = '22026'
	184	DB_ERR_INTEGRITY_CONSTRAINT_VIOL, // SqlState = '23000'
	185	DB_ERR_INVALID_CURSOR_STATE, // SqlState = '24000'
	186	DB_ERR_INVALID_TRANS_STATE, // SqlState = '25000'
	187	DB_ERR_INVALID_AUTH_SPEC, // SqlState = '28000'
	188	DB_ERR_INVALID_CURSOR_NAME, // SqlState = '34000'
	189	DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL, // SqlState = '37000'
	190	DB_ERR_DUPLICATE_CURSOR_NAME, // SqlState = '3C000'
	191	DB_ERR_SERIALIZATION_FAILURE, // SqlState = '40001'
	192	DB_ERR_SYNTAX_ERROR_OR_ACCESS_VIOL2, // SqlState = '42000'
	193	DB_ERR_OPERATION_ABORTED, // SqlState = '70100'
	194	DB_ERR_UNSUPPORTED_FUNCTION, // SqlState = 'IM001'
	195	DB_ERR_NO_DATA_SOURCE, // SqlState = 'IM002'
	196	DB_ERR_DRIVER_LOAD_ERROR, // SqlState = 'IM003'
	197	DB_ERR_SQLALLOCENV_FAILED, // SqlState = 'IM004'
	198	DB_ERR_SQLALLOCCONNECT_FAILED, // SqlState = 'IM005'
	199	DB_ERR_SQLSETCONNECTOPTION_FAILED, // SqlState = 'IM006'
	200	DB_ERR_NO_DATA_SOURCE_DLG_PROHIB, // SqlState = 'IM007'
	201	DB_ERR_DIALOG_FAILED, // SqlState = 'IM008'
	202	DB_ERR_UNABLE_TO_LOAD_TRANSLATION_DLL, // SqlState = 'IM009'
	203	DB_ERR_DATA_SOURCE_NAME_TOO_LONG, // SqlState = 'IM010'
	204	DB_ERR_DRIVER_NAME_TOO_LONG, // SqlState = 'IM011'
	205	DB_ERR_DRIVER_KEYWORD_SYNTAX_ERROR, // SqlState = 'IM012'
	206	DB_ERR_TRACE_FILE_ERROR, // SqlState = 'IM013'
	207	DB_ERR_TABLE_OR_VIEW_ALREADY_EXISTS, // SqlState = 'S0001'
	208	DB_ERR_TABLE_NOT_FOUND, // SqlState = 'S0002'
	209	DB_ERR_INDEX_ALREADY_EXISTS, // SqlState = 'S0011'
	210	DB_ERR_INDEX_NOT_FOUND, // SqlState = 'S0012'
	211	DB_ERR_COLUMN_ALREADY_EXISTS, // SqlState = 'S0021'
	212	DB_ERR_COLUMN_NOT_FOUND, // SqlState = 'S0022'
	213	DB_ERR_NO_DEFAULT_FOR_COLUMN, // SqlState = 'S0023'
	214	DB_ERR_GENERAL_ERROR, // SqlState = 'S1000'
	215	DB_ERR_MEMORY_ALLOCATION_FAILURE, // SqlState = 'S1001'
	216	DB_ERR_INVALID_COLUMN_NUMBER, // SqlState = 'S1002'
	217	DB_ERR_PROGRAM_TYPE_OUT_OF_RANGE, // SqlState = 'S1003'
	218	DB_ERR_SQL_DATA_TYPE_OUT_OF_RANGE, // SqlState = 'S1004'
	219	DB_ERR_OPERATION_CANCELLED, // SqlState = 'S1008'
	220	DB_ERR_INVALID_ARGUMENT_VALUE, // SqlState = 'S1009'
	221	DB_ERR_FUNCTION_SEQUENCE_ERROR, // SqlState = 'S1010'
222	DB_ERR_OPERATION_INVALID_AT_THIS_TIME, // SqlState = 'S1011'
223	DB_ERR_INVALID_TRANS_OPERATION_CODE, // SqlState = 'S1012'
224	DB_ERR_NO_CURSOR_NAME_AVAIL, // SqlState = 'S1015'
225	DB_ERR_INVALID_STR_OR_BUF_LEN, // SqlState = 'S1090'
226	DB_ERR_DESCRIPTOR_TYPE_OUT_OF_RANGE, // SqlState = 'S1091'
227	DB_ERR_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1092'
228	DB_ERR_INVALID_PARAM_NO, // SqlState = 'S1093'
229	DB_ERR_INVALID_SCALE_VALUE, // SqlState = 'S1094'
230	DB_ERR_FUNCTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1095'
231	DB_ERR_INF_TYPE_OUT_OF_RANGE, // SqlState = 'S1096'
232	DB_ERR_COLUMN_TYPE_OUT_OF_RANGE, // SqlState = 'S1097'
233	DB_ERR_SCOPE_TYPE_OUT_OF_RANGE, // SqlState = 'S1098'
234	DB_ERR_NULLABLE_TYPE_OUT_OF_RANGE, // SqlState = 'S1099'
235	DB_ERR_UNIQUENESS_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1100'
236	DB_ERR_ACCURACY_OPTION_TYPE_OUT_OF_RANGE, // SqlState = 'S1101'
237	DB_ERR_DIRECTION_OPTION_OUT_OF_RANGE, // SqlState = 'S1103'
238	DB_ERR_INVALID_PRECISION_VALUE, // SqlState = 'S1104'
239	DB_ERR_INVALID_PARAM_TYPE, // SqlState = 'S1105'
240	DB_ERR_FETCH_TYPE_OUT_OF_RANGE, // SqlState = 'S1106'
241	DB_ERR_ROW_VALUE_OUT_OF_RANGE, // SqlState = 'S1107'
242	DB_ERR_CONCURRENCY_OPTION_OUT_OF_RANGE, // SqlState = 'S1108'
243	DB_ERR_INVALID_CURSOR_POSITION, // SqlState = 'S1109'
244	DB_ERR_INVALID_DRIVER_COMPLETION, // SqlState = 'S1110'
245	DB_ERR_INVALID_BOOKMARK_VALUE, // SqlState = 'S1111'
246	DB_ERR_DRIVER_NOT_CAPABLE, // SqlState = 'S1C00'
247	DB_ERR_TIMEOUT_EXPIRED // SqlState = 'S1T00'
248	};
249
250	struct DbStuff
251	{
252	HENV Henv;
a2115c88 GT	253	char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name
	254	char Uid[20+1]; // User ID
	255	char AuthStr[20+1]; // Authorization string (password)
	256
	257	char description[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is
	258	char fileType[SQL_MAX_DSN_LENGTH+1]; // Not sure what the max length is
	259
	260	// Optionals needed for some databases like dBase
	261	char defaultDir[DB_PATH_MAX]; // Directory that db file resides in
108106cf JS	262	};
	263
	264	typedef struct
	265	{
	266	char TypeName[DB_TYPE_NAME_LEN];
	267	int FsqlType;
	268	long Precision;
	269	short CaseSensitive;
	270	// short MinimumScale;
	271	short MaximumScale;
	272	} SqlTypeInfo;
	273
9f8de18f	274	class WXDLLEXPORT CcolInf
108106cf JS	275	{
	276	public:
	277	char tableName[DB_MAX_TABLE_NAME_LEN+1];
	278	char colName[DB_MAX_COLUMN_NAME_LEN+1];
	279	int sqlDataType;
	280	};
	281
1fc5dd6f JS	282	enum sqlLog
	283	{
	284	sqlLogOFF,
	285	sqlLogON
	286	};
	287
a2115c88 GT	288	enum dbms
	289	{
	290	dbmsUNIDENTIFIED,
	291	dbmsORACLE,
	292	dbmsSYBASE_ASA, // Adaptive Server Anywhere
	293	dbmsSYBASE_ASE, // Adaptive Server Enterprise
	294	dbmsMS_SQL_SERVER,
	295	dbmsMY_SQL,
	296	dbmsPOSTGRES,
	297	dbmsACCESS,
ac465026 GT	298	dbmsDBASE,
ac465026 GT	299	dbmsINFORMIX
a2115c88 GT	300	};
	301
	302	typedef enum dbms DBMS;
	303
	304	// The wxDB::errorList is copied to this variable when the wxDB object
	305	// is closed. This way, the error list is still available after the
	306	// database object is closed. This is necessary if the database
	307	// connection fails so the calling application can show the operator
	308	// why the connection failed. Note: as each wxDB object is closed, it
	309	// will overwrite the errors of the previously destroyed wxDB object in
	310	// this variable.
	311	extern char DBerrorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
	312
9f8de18f	313	class WXDLLEXPORT wxDB
108106cf JS	314	{
	315	private:
	316
	317	// Private data
1fc5dd6f JS	318	bool dbIsOpen;
	319	char *dsn; // Data source name
	320	char *uid; // User ID
	321	char *authStr; // Authorization string (password)
	322	FILE *fpSqlLog; // Sql Log file pointer
	323	enum sqlLog sqlLogState; // On or Off
108106cf JS	324
	325	// Private member functions
	326	bool getDbInfo(void);
	327	bool getDataTypeInfo(SWORD fSqlType, SqlTypeInfo &structSQLTypeInfo);
	328	bool setConnectionOptions(void);
0b0ca94c	329	void logError(const char errMsg, const char SQLState);
108106cf JS	330
	331	public:
	332
	333	// The following structure contains database information gathered from the
	334	// datasource when the datasource is first opened.
	335	struct
	336	{
	337	char dbmsName[40]; // Name of the dbms product
a2115c88	338	char dbmsVer[64]; // Version # of the dbms product
108106cf	339	char driverName[40]; // Driver name
1acd7ba6 RR	340	char odbcVer[60]; // ODBC version of the driver
	341	char drvMgrOdbcVer[60]; // ODBC version of the driver manager
	342	char driverVer[60]; // Driver version
	343	char serverName[80]; // Server Name, typically a connect string
108106cf JS	344	char databaseName[128]; // Database filename
	345	char outerJoins[2]; // Indicates whether the data source supports outer joins
	346	char procedureSupport[2]; // Indicates whether the data source supports stored procedures
	347	UWORD maxConnections; // Maximum # of connections the data source supports
	348	UWORD maxStmts; // Maximum # of HSTMTs per HDBC
	349	UWORD apiConfLvl; // ODBC API conformance level
	350	UWORD cliConfLvl; // Indicates whether the data source is SAG compliant
	351	UWORD sqlConfLvl; // SQL conformance level
	352	UWORD cursorCommitBehavior; // Indicates how cursors are affected by a db commit
	353	UWORD cursorRollbackBehavior; // Indicates how cursors are affected by a db rollback
	354	UWORD supportNotNullClause; // Indicates if data source supports NOT NULL clause
	355	char supportIEF[2]; // Integrity Enhancement Facility (Referential Integrity)
	356	UDWORD txnIsolation; // Default transaction isolation level supported by the driver
	357	UDWORD txnIsolationOptions; // Transaction isolation level options available
	358	UDWORD fetchDirections; // Fetch directions supported
	359	UDWORD lockTypes; // Lock types supported in SQLSetPos
	360	UDWORD posOperations; // Position operations supported in SQLSetPos
	361	UDWORD posStmts; // Position statements supported
	362	UDWORD scrollConcurrency; // Concurrency control options supported for scrollable cursors
	363	UDWORD scrollOptions; // Scroll Options supported for scrollable cursors
	364	UDWORD staticSensitivity; // Indicates if additions, deletions and updates can be detected
	365	UWORD txnCapable; // Indicates if the data source supports transactions
	366	UDWORD loginTimeout; // Number seconds to wait for a login request
	367	} dbInf;
	368
	369	// ODBC handles
	370	HENV henv; // ODBC Environment handle
	371	HDBC hdbc; // ODBC DB Connection handle
	372	HSTMT hstmt; // ODBC Statement handle
	373
	374	// ODBC Error Inf.
	375	char sqlState[20];
	376	SDWORD nativeError;
	377	char errorMsg[SQL_MAX_MESSAGE_LENGTH];
	378	SWORD cbErrorMsg;
	379	char errorList[DB_MAX_ERROR_HISTORY][DB_MAX_ERROR_MSG_LEN];
	380	int DB_STATUS;
	381
	382	//Error reporting mode
	383	bool silent;
	384
a2115c88 GT	385	// Number of Ctable objects connected to this db object
	386	unsigned int nTables;
	387
108106cf JS	388	// Inf. about logical data types VARCHAR, INTEGER, FLOAT and DATE.
	389	// This inf. is obtained from the ODBC driver by use of the
	390	// SQLGetTypeInfo() function. The key piece of inf. is the
	391	// type name the data source uses for each logical data type.
	392	// e.g. VARCHAR; Oracle calls it VARCHAR2.
	393	SqlTypeInfo typeInfVarchar, typeInfInteger, typeInfFloat, typeInfDate;
	394
	395	// Public member functions
	396	wxDB(HENV &aHenv);
1fc5dd6f JS	397	bool Open(char Dsn, char Uid, char *AuthStr); // Data Source Name, User ID, Password
	398	void Close(void);
	399	bool CommitTrans(void);
	400	bool RollbackTrans(void);
	401	bool DispAllErrors(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
	402	bool GetNextError(HENV aHenv, HDBC aHdbc = SQL_NULL_HDBC, HSTMT aHstmt = SQL_NULL_HSTMT);
	403	void DispNextError(void);
0b0ca94c GT	404	bool CreateView(const char viewName, const char colList, const char *pSqlStmt, bool attemptDrop=TRUE);
	405	bool DropView(const char *viewName);
	406	bool ExecSql(const char *pSqlStmt);
a2115c88 GT	407	bool GetNext(void);
a2115c88 GT	408	bool GetData(UWORD colNo, SWORD cType, PTR pData, SDWORD maxLen, SDWORD FAR *cbReturned);
0b0ca94c GT	409	bool Grant(int privileges, const char tableName, const char userList = "PUBLIC");
	410	int TranslateSqlState(const char *SQLState);
	411	bool Catalog(const char userID, const char fileName = "Catalog.txt");
	412	CcolInf GetColumns(char tableName[], const char *userID=NULL);
1fc5dd6f JS	413	char *GetDatabaseName(void) {return dbInf.dbmsName;}
1fc5dd6f JS	414	char *GetDataSource(void) {return dsn;}
a2115c88 GT	415	char *GetUsername(void) {return uid;}
a2115c88 GT	416	char *GetPassword(void) {return authStr;}
1fc5dd6f JS	417	bool IsOpen(void) {return dbIsOpen;}
	418	HENV GetHENV(void) {return henv;}
	419	HDBC GetHDBC(void) {return hdbc;}
a2115c88	420	HSTMT GetHSTMT(void) {return hstmt;}
0b0ca94c GT	421	bool TableExists(const char tableName, const char userID=NULL, const char *path=NULL); // Table name can refer to a table, view, alias or synonym
	422	void LogError(const char errMsg, const char SQLState = 0) {logError(errMsg, SQLState);}
	423	bool SqlLog(enum sqlLog state, const char *filename = "sqllog.txt", bool append = FALSE);
	424	bool WriteSqlLog(const char *logMsg);
a2115c88	425	DBMS Dbms(void);
108106cf JS	426
	427	}; // wxDB
	428
	429	// This structure forms a node in a linked list. The linked list of "DbList" objects
	430	// keeps track of allocated database connections. This allows the application to
	431	// open more than one database connection through ODBC for multiple transaction support
	432	// or for multiple database support.
	433
	434	struct DbList
	435	{
	436	DbList *PtrPrev; // Pointer to previous item in the list
	437	char Dsn[SQL_MAX_DSN_LENGTH+1]; // Data Source Name
	438	wxDB *PtrDb; // Pointer to the wxDB object
	439	bool Free; // Is item free or in use?
	440	DbList *PtrNext; // Pointer to next item in the list
	441	};
	442
a2115c88	443
154f22b3	444	#ifdef __WXDEBUG__
e115e771	445	#include "wx/object.h"
a2115c88 GT	446	class CstructTablesInUse : public wxObject
	447	{
	448	public:
	449	const char *tableName;
	450	ULONG tableID;
	451	class wxDB *pDb;
	452	}; // CstructTablesInUse
	453	#endif
	454
108106cf JS	455	// The following routines allow a user to get new database connections, free them
	456	// for other code segments to use, or close all of them when the application has
	457	// completed.
	458
a497618a	459	wxDB WXDLLEXPORT GetDbConnection(DbStuff pDbStuff);
a1218415 UU	460	bool WXDLLEXPORT FreeDbConnection(wxDB *pDb);
	461	void WXDLLEXPORT CloseDbConnections(void);
	462	int WXDLLEXPORT NumberDbConnectionsInUse(void);
108106cf	463
a2115c88	464	// This function sets the sql log state for all open wxDB objects
0b0ca94c	465	bool SqlLog(enum sqlLog state, const char *filename = "sqllog.txt");
a2115c88	466
108106cf JS	467	// This routine allows you to query a driver manager
	468	// for a list of available datasources. Call this routine
	469	// the first time using SQL_FETCH_FIRST. Continue to call it
	470	// using SQL_FETCH_NEXT until you've exhausted the list.
0b0ca94c	471	bool WXDLLEXPORT GetDataSource(HENV henv, const char Dsn, SWORD DsnMax, const char DsDesc, SWORD DsDescMax,
108106cf JS	472	UWORD direction = SQL_FETCH_NEXT);
	473
	474	#endif