wxWidgets/include/wx/dbtable.h
1999-11-08 21:14:50 +00:00

197 lines
7.4 KiB
C++

///////////////////////////////////////////////////////////////////////////////
// Name: dbtable.h
// Purpose: Declaration of the wxTable class.
// Author: Doug Card
// Modified by:
// 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 DBTABLE_DOT_H
#define DBTABLE_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 "dbtable.h"
#endif
#endif
#if wxMAJOR_VERSION == 2
#include "wx/db.h"
#else
#include "db.h"
#endif
const int ROWID_LEN = 24; // 18 is the max, 24 is in case it gets larger
const int DEFAULT_CURSOR = 0;
const bool QUERY_ONLY = TRUE;
const bool DISABLE_VIEW = TRUE;
// The following class is used to define a column of a table.
// The wxTable constructor will dynamically allocate as many of
// these as there are columns in the table. The class derived
// from wxTable must initialize these column definitions in it's
// constructor. These column definitions provide inf. to the
// wxTable class which allows it to create a table in the data
// source, exchange data between the data source and the C++
// object, and so on.
class WXDLLEXPORT CcolDef
{
public:
char ColName[DB_MAX_COLUMN_NAME_LEN+1]; // Column Name
int DbDataType; // Logical Data Type; e.g. DB_DATA_TYPE_INTEGER
int SqlCtype; // C data type; e.g. SQL_C_LONG
void *PtrDataObj; // Address of the data object
int SzDataObj; // Size, in bytes, of the data object
bool KeyField; // TRUE if this column is part of the PRIMARY KEY to the table; Date fields should NOT be KeyFields.
bool Updateable; // Specifies whether this column is updateable
bool InsertAllowed; // Specifies whether this column should be included in an INSERT statement
bool DerivedCol; // Specifies whether this column is a derived value
SDWORD CbValue; // Internal use only!!!
bool Null; // NOT FULLY IMPLEMENTED - Allows NULL values in Inserts and Updates
}; // CcolDef
// This structure is used when creating secondary indexes.
class WXDLLEXPORT CidxDef
{
public:
char ColName[DB_MAX_COLUMN_NAME_LEN+1];
bool Ascending;
}; // CidxDef
class WXDLLEXPORT wxTable
{
private:
ULONG tableID; // Used for debugging. This can help to match up mismatched constructors/destructors
// Private member variables
UDWORD cursorType;
// Private member functions
bool bindInsertParams(void);
bool bindUpdateParams(void);
bool bindCols(HSTMT cursor);
bool getRec(UWORD fetchType);
bool execDelete(char *pSqlStmt);
bool execUpdate(char *pSqlStmt);
bool query(int queryType, bool forUpdate, bool distinct, char *pSqlStmt = 0);
public:
// Pointer to the database object this table belongs to
wxDB *pDb;
// ODBC Handles
HENV henv; // ODBC Environment handle
HDBC hdbc; // ODBC DB Connection handle
HSTMT hstmt; // ODBC Statement handle
HSTMT *hstmtDefault; // Default cursor
HSTMT hstmtInsert; // ODBC Statement handle used specifically for inserts
HSTMT hstmtDelete; // ODBC Statement handle used specifically for deletes
HSTMT hstmtUpdate; // ODBC Statement handle used specifically for updates
HSTMT hstmtInternal; // ODBC Statement handle used internally only
HSTMT *hstmtCount; // ODBC Statement handle used by Count() function (No binding of columns)
// Table Inf.
char tableName[DB_MAX_TABLE_NAME_LEN+1]; // Table name
char queryTableName[DB_MAX_TABLE_NAME_LEN+1]; // Query Table Name
int noCols; // # of columns in the table
bool queryOnly; // Query Only, no inserts, updates or deletes
char tablePath[DB_PATH_MAX]; // needed for dBase tables
// Column Definitions
CcolDef *colDefs; // Array of CcolDef structures
// Where, Order By and From clauses
char *where; // Standard SQL where clause, minus the word WHERE
char *orderBy; // Standard SQL order by clause, minus the ORDER BY
char *from; // Allows for joins in a wxTable::Query(). Format: ",tbl,tbl..."
// Flags
bool selectForUpdate;
// Public member functions
wxTable(wxDB *pwxDB, const char *tblName, const int nCols,
const char *qryTblName = 0, bool qryOnly = !QUERY_ONLY, char *tblPath=NULL);
virtual ~wxTable();
bool Open(void);
bool CreateTable(bool attemptDrop=TRUE);
bool DropTable(void);
bool CreateIndex(char * idxName, bool unique, int noIdxCols, CidxDef *pIdxDefs, bool attemptDrop=TRUE);
bool DropIndex(char * idxName);
bool CloseCursor(HSTMT cursor);
int Insert(void);
bool Update(void);
bool Update(char *pSqlStmt);
bool UpdateWhere(char *pWhereClause);
bool Delete(void);
bool DeleteWhere(char *pWhereClause);
bool DeleteMatching(void);
virtual bool Query(bool forUpdate = FALSE, bool distinct = FALSE);
bool QueryBySqlStmt(char *pSqlStmt);
bool QueryMatching(bool forUpdate = FALSE, bool distinct = FALSE);
bool QueryOnKeyFields(bool forUpdate = FALSE, bool distinct = FALSE);
bool GetNext(void) { return(getRec(SQL_FETCH_NEXT)); }
bool operator++(int) { return(getRec(SQL_FETCH_NEXT)); }
#if !wxODBC_FWD_ONLY_CURSORS
bool GetPrev(void) { return(getRec(SQL_FETCH_PRIOR)); }
bool operator--(int) { return(getRec(SQL_FETCH_PRIOR)); }
bool GetFirst(void) { return(getRec(SQL_FETCH_FIRST)); }
bool GetLast(void) { return(getRec(SQL_FETCH_LAST)); }
#endif
bool IsCursorClosedOnCommit(void);
bool IsColNull(int colNo);
UWORD GetRowNum(void);
void GetSelectStmt(char *pSqlStmt, int typeOfSelect, bool distinct);
void GetDeleteStmt(char *pSqlStmt, int typeOfDel, char *pWhereClause = 0);
void GetUpdateStmt(char *pSqlStmt, int typeOfUpd, char *pWhereClause = 0);
void GetWhereClause(char *pWhereClause, int typeOfWhere, char *qualTableName = 0);
bool CanSelectForUpdate(void);
bool CanUpdByROWID(void);
void ClearMemberVars(void);
bool SetQueryTimeout(UDWORD nSeconds);
void SetColDefs (int index, char *fieldName, int dataType, void *pData, int cType,
int size, bool keyField = FALSE, bool upd = TRUE,
bool insAllow = TRUE, bool derivedCol = FALSE);
HSTMT *NewCursor(bool setCursor = FALSE, bool bindColumns = TRUE);
bool DeleteCursor(HSTMT *hstmtDel);
void SetCursor(HSTMT *hstmtActivate = (void **) DEFAULT_CURSOR);
HSTMT GetCursor(void) { return(hstmt); }
ULONG Count(void);
int DB_STATUS(void) { return(pDb->DB_STATUS); }
bool Refresh(void);
bool SetNull(int colNo);
bool SetNull(char *colName);
#ifdef __WXDEBUG__
ULONG GetTableID() { return tableID; };
#endif
}; // wxTable
#endif