02cf6fdd85
All variables/parameters having to do with number of columns changed to be of type UWORD rather than int, avoiding compiler warnings and giant tables causing problems, and matching the types with the ODBC APIs git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9718 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
360 lines
16 KiB
C++
360 lines
16 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: dbtable.h
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// Purpose: Declaration of the wxDbTable class.
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// Author: Doug Card
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// Modified by: George Tasker
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// Bart Jourquin
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// Mark Johnson
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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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// SYNOPSIS START
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// SYNOPSIS STOP
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*/
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#ifndef DBTABLE_DOT_H
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#define DBTABLE_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 "dbtable.h"
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#endif
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#endif
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#if wxMAJOR_VERSION == 2
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#include "wx/db.h"
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#else
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#include "db.h"
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#endif
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const int wxDB_ROWID_LEN = 24; // 18 is the max, 24 is in case it gets larger
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const int wxDB_DEFAULT_CURSOR = 0;
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const bool wxDB_QUERY_ONLY = TRUE;
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const bool wxDB_DISABLE_VIEW = TRUE;
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// Used to indicate end of a variable length list of
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// column numbers passed to member functions
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const int wxDB_NO_MORE_COLUMN_NUMBERS = -1;
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// The following class is used to define a column of a table.
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// The wxDbTable constructor will dynamically allocate as many of
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// these as there are columns in the table. The class derived
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// from wxDbTable must initialize these column definitions in it's
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// constructor. These column definitions provide inf. to the
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// wxDbTable class which allows it to create a table in the data
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// source, exchange data between the data source and the C++
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// object, and so on.
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class WXDLLEXPORT wxDbColDef
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{
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public:
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wxChar ColName[DB_MAX_COLUMN_NAME_LEN+1]; // Column Name
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int DbDataType; // Logical Data Type; e.g. DB_DATA_TYPE_INTEGER
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SWORD SqlCtype; // C data type; e.g. SQL_C_LONG
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void *PtrDataObj; // Address of the data object
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int SzDataObj; // Size, in bytes, of the data object
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bool KeyField; // TRUE if this column is part of the PRIMARY KEY to the table; Date fields should NOT be KeyFields.
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bool Updateable; // Specifies whether this column is updateable
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bool InsertAllowed; // Specifies whether this column should be included in an INSERT statement
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bool DerivedCol; // Specifies whether this column is a derived value
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SDWORD CbValue; // Internal use only!!!
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bool Null; // NOT FULLY IMPLEMENTED - Allows NULL values in Inserts and Updates
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wxDbColDef();
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bool Initialize();
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}; // wxDbColDef
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class WXDLLEXPORT wxDbColDataPtr
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{
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public:
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void *PtrDataObj;
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int SzDataObj;
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SWORD SqlCtype;
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}; // wxDbColDataPtr
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// This structure is used when creating secondary indexes.
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class WXDLLEXPORT wxDbIdxDef
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{
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public:
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wxChar ColName[DB_MAX_COLUMN_NAME_LEN+1];
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bool Ascending;
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}; // wxDbIdxDef
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class WXDLLEXPORT wxDbTable
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{
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private:
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ULONG tableID; // Used for debugging. This can help to match up mismatched constructors/destructors
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// Private member variables
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UDWORD cursorType;
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bool insertable;
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// Private member functions
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bool initialize(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
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const wxString &qryTblName, bool qryOnly, const wxString &tblPath);
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void cleanup();
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bool bindParams(bool forUpdate); // called by the other 'bind' functions
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bool bindInsertParams(void);
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bool bindUpdateParams(void);
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bool bindCols(HSTMT cursor);
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bool getRec(UWORD fetchType);
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bool execDelete(const wxString &pSqlStmt);
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bool execUpdate(const wxString &pSqlStmt);
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bool query(int queryType, bool forUpdate, bool distinct, const wxString &pSqlStmt=wxEmptyString);
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#if !wxODBC_BACKWARD_COMPATABILITY
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// these were public
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// Where, Order By and From clauses
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wxString where; // Standard SQL where clause, minus the word WHERE
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wxString orderBy; // Standard SQL order by clause, minus the ORDER BY
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wxString from; // Allows for joins in a wxDbTable::Query(). Format: ",tbl,tbl..."
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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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HSTMT *hstmtDefault; // Default cursor
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HSTMT hstmtInsert; // ODBC Statement handle used specifically for inserts
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HSTMT hstmtDelete; // ODBC Statement handle used specifically for deletes
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HSTMT hstmtUpdate; // ODBC Statement handle used specifically for updates
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HSTMT hstmtInternal; // ODBC Statement handle used internally only
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HSTMT *hstmtCount; // ODBC Statement handle used by Count() function (No binding of columns)
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// Flags
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bool selectForUpdate;
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// Pointer to the database object this table belongs to
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wxDb *pDb;
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// Table Inf.
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wxString tablePath; // needed for dBase tables
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wxString tableName; // Table name
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wxString queryTableName; // Query Table Name
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UWORD noCols; // # of columns in the table
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bool queryOnly; // Query Only, no inserts, updates or deletes
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// Column Definitions
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wxDbColDef *colDefs; // Array of wxDbColDef structures
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#endif
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public:
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#if wxODBC_BACKWARD_COMPATABILITY
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// Where, Order By and From clauses
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char *where; // Standard SQL where clause, minus the word WHERE
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char *orderBy; // Standard SQL order by clause, minus the ORDER BY
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char *from; // Allows for joins in a wxDbTable::Query(). Format: ",tbl,tbl..."
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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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HSTMT *hstmtDefault; // Default cursor
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HSTMT hstmtInsert; // ODBC Statement handle used specifically for inserts
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HSTMT hstmtDelete; // ODBC Statement handle used specifically for deletes
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HSTMT hstmtUpdate; // ODBC Statement handle used specifically for updates
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HSTMT hstmtInternal; // ODBC Statement handle used internally only
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HSTMT *hstmtCount; // ODBC Statement handle used by Count() function (No binding of columns)
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// Flags
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bool selectForUpdate;
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// Pointer to the database object this table belongs to
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wxDb *pDb;
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// Table Inf.
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char tablePath[wxDB_PATH_MAX]; // needed for dBase tables
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char tableName[DB_MAX_TABLE_NAME_LEN+1]; // Table name
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char queryTableName[DB_MAX_TABLE_NAME_LEN+1]; // Query Table Name
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UWORD noCols; // # of columns in the table
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bool queryOnly; // Query Only, no inserts, updates or deletes
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// Column Definitions
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wxDbColDef *colDefs; // Array of wxDbColDef structures
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#endif
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// Public member functions
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wxDbTable(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
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const wxString &qryTblName="", bool qryOnly = !wxDB_QUERY_ONLY,
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const wxString &tblPath="");
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// DEPRECATED
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wxDbTable(wxDb *pwxDb, const wxString &tblName, const UWORD numColumns,
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const wxChar *qryTblName="", bool qryOnly = !wxDB_QUERY_ONLY,
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const wxString &tblPath="");
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virtual ~wxDbTable();
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bool Open(bool checkPrivileges=FALSE, bool checkTableExists=TRUE);
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bool CreateTable(bool attemptDrop=TRUE);
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bool DropTable(void);
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bool CreateIndex(const wxString &idxName, bool unique, int noIdxCols,
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wxDbIdxDef *pIdxDefs, bool attemptDrop=TRUE);
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bool DropIndex(const wxString &idxName);
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// Accessors
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// The member variables returned by these accessors are all
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// set when the wxDbTable instance is created and cannot be
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// changed, hence there is no corresponding SetXxxx function
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wxDb *GetDb() { return pDb; }
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const wxString &GetTableName() { return tableName; }
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const wxString &GetQueryTableName() { return queryTableName; }
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const wxString &GetTablePath() { return tablePath; }
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UWORD GetNumberOfColumns() { return noCols; } // number of "defined" columns for this wxDbTable instance
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const wxString &GetFromClause() { return from; }
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const wxString &GetOrderByClause() { return orderBy; }
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const wxString &GetWhereClause() { return where; }
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bool IsQueryOnly() { return queryOnly; }
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#if wxODBC_BACKWARD_COMPATABILITY
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void SetFromClause(const char *From) { from = (char *)From; }
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void SetOrderByClause(const char *OrderBy) { orderBy = (char *)OrderBy; }
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void SetWhereClause(const char *Where) { where = (char *)Where; }
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#else
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void SetFromClause(const wxString &From) { from = From; }
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void SetOrderByClause(const wxString &OrderBy) { orderBy = OrderBy; }
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bool SetOrderByColNums(int first, ...);
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void SetWhereClause(const wxString &Where) { where = Where; }
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void From(const wxString &From) { from = From; }
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void OrderBy(const wxString &OrderBy) { orderBy = OrderBy; }
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void Where(const wxString &Where) { where = Where; }
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const wxString &Where() { return where; }
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const wxString &OrderBy() { return orderBy; }
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const wxString &From() { return from; }
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#endif
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int Insert(void);
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bool Update(void);
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bool Update(const wxString &pSqlStmt);
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bool UpdateWhere(const wxString &pWhereClause);
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bool Delete(void);
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bool DeleteWhere(const wxString &pWhereClause);
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bool DeleteMatching(void);
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virtual bool Query(bool forUpdate = FALSE, bool distinct = FALSE);
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bool QueryBySqlStmt(const wxString &pSqlStmt);
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bool QueryMatching(bool forUpdate = FALSE, bool distinct = FALSE);
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bool QueryOnKeyFields(bool forUpdate = FALSE, bool distinct = FALSE);
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bool Refresh(void);
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bool GetNext(void) { return(getRec(SQL_FETCH_NEXT)); }
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bool operator++(int) { return(getRec(SQL_FETCH_NEXT)); }
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/***** These four functions only work with wxDb instances that are defined *****
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***** as not being FwdOnlyCursors *****/
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bool GetPrev(void);
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bool operator--(int);
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bool GetFirst(void);
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bool GetLast(void);
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bool IsCursorClosedOnCommit(void);
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UWORD GetRowNum(void);
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void BuildSelectStmt(wxString &pSqlStmt, int typeOfSelect, bool distinct);
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void BuildSelectStmt(wxChar *pSqlStmt, int typeOfSelect, bool distinct);
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void BuildDeleteStmt(wxString &pSqlStmt, int typeOfDel, const wxString &pWhereClause="");
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void BuildDeleteStmt(wxChar *pSqlStmt, int typeOfDel, const wxString &pWhereClause="");
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void BuildUpdateStmt(wxString &pSqlStmt, int typeOfUpd, const wxString &pWhereClause="");
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void BuildUpdateStmt(wxChar *pSqlStmt, int typeOfUpd, const wxString &pWhereClause="");
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void BuildWhereClause(wxString &pWhereClause, int typeOfWhere, const wxString &qualTableName="", bool useLikeComparison=FALSE);
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void BuildWhereClause(wxChar *pWhereClause, int typeOfWhere, const wxString &qualTableName="", bool useLikeComparison=FALSE);
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#if wxODBC_BACKWARD_COMPATABILITY
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// The following member functions are deprecated. You should use the BuildXxxxxStmt functions (above)
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void GetSelectStmt(char *pSqlStmt, int typeOfSelect, bool distinct)
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{ BuildSelectStmt(pSqlStmt,typeOfSelect,distinct); }
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void GetDeleteStmt(char *pSqlStmt, int typeOfDel, const char *pWhereClause = NULL)
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{ BuildDeleteStmt(pSqlStmt,typeOfDel,pWhereClause); }
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void GetUpdateStmt(char *pSqlStmt, int typeOfUpd, const char *pWhereClause = NULL)
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{ BuildUpdateStmt(pSqlStmt,typeOfUpd,pWhereClause); }
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void GetWhereClause(char *pWhereClause, int typeOfWhere,
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const char *qualTableName = NULL, bool useLikeComparison=FALSE)
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{ BuildWhereClause(pWhereClause,typeOfWhere,qualTableName,useLikeComparison); }
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#endif
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bool CanSelectForUpdate(void);
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bool CanUpdByROWID(void);
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void ClearMemberVar(int colNo, bool setToNull=FALSE);
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void ClearMemberVars(bool setToNull=FALSE);
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bool SetQueryTimeout(UDWORD nSeconds);
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wxDbColDef *GetColDefs() { return colDefs; }
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void SetColDefs(int index, const wxString &fieldName, int dataType,
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void *pData, SWORD cType,
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int size, bool keyField = FALSE, bool upd = TRUE,
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bool insAllow = TRUE, bool derivedCol = FALSE);
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wxDbColDataPtr *SetColDefs(wxDbColInf *colInfs, ULONG numCols);
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bool CloseCursor(HSTMT cursor);
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bool DeleteCursor(HSTMT *hstmtDel);
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void SetCursor(HSTMT *hstmtActivate = (void **) wxDB_DEFAULT_CURSOR);
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HSTMT GetCursor(void) { return(hstmt); }
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HSTMT *GetNewCursor(bool setCursor = FALSE, bool bindColumns = TRUE);
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#if wxODBC_BACKWARD_COMPATABILITY
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// The following member function is deprecated. You should use the GetNewCursor
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HSTMT *NewCursor(bool setCursor = FALSE, bool bindColumns = TRUE) { return GetNewCursor(setCursor,bindColumns); }
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#endif
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ULONG Count(const wxString &args="*");
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int DB_STATUS(void) { return(pDb->DB_STATUS); }
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bool IsColNull(int colNo);
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bool SetColNull(int colNo, bool set=TRUE);
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bool SetColNull(const wxString &colName, bool set=TRUE);
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#if wxODBC_BACKWARD_COMPATABILITY
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// The following member functions are deprecated. You should use the SetColNull()
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bool SetNull(int colNo, bool set=TRUE) { return (SetNull(colNo,set)); }
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bool SetNull(const char *colName, bool set=TRUE) { return (SetNull(colName,set)); }
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#endif
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#ifdef __WXDEBUG__
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ULONG GetTableID() { return tableID; }
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#endif
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}; // wxDbTable
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// Change this to 0 to remove use of all deprecated functions
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#if wxODBC_BACKWARD_COMPATABILITY
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//#################################################################################
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//############### DEPRECATED functions for backward compatability #################
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//#################################################################################
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// Backward compability. These will eventually go away
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typedef wxDbTable wxTable;
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typedef wxDbIdxDef wxIdxDef;
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typedef wxDbIdxDef CidxDef;
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typedef wxDbColDef wxColDef;
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typedef wxDbColDef CcolDef;
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typedef wxDbColDataPtr wxColDataPtr;
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typedef wxDbColDataPtr CcolDataPtr;
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const int ROWID = wxDB_ROWID_LEN;
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const int DEFAULT_CURSOR = wxDB_DEFAULT_CURSOR;
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const bool QUERY_ONLY = wxDB_QUERY_ONLY;
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const bool DISABLE_VIEW = wxDB_DISABLE_VIEW;
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#endif
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#endif
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