include/wx/dbtable.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        table.h
   3 // Purpose:     Declaration of the wxTable class.
   4 // Author:      Doug Card
   5 // Modified by:
   6 // Created:     9.96
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1996 Remstar International, Inc.
   9 // Licence:     wxWindows licence, plus:
  10 // Notice:              This class library and its intellectual design are free of charge for use,
  11 //              modification, enhancement, debugging under the following conditions:
  12 //              1) These classes may only be used as part of the implementation of a
  13 //                 wxWindows-based application
  14 //              2) All enhancements and bug fixes are to be submitted back to the wxWindows
  15 //                 user groups free of all charges for use with the wxWindows library.
  16 //              3) These classes may not be distributed as part of any other class library,
  17 //                 DLL, text (written or electronic), other than a complete distribution of
  18 //                 the wxWindows GUI development toolkit.
  19 ///////////////////////////////////////////////////////////////////////////////
  20
  21 /*
  22 // SYNOPSIS START
  23 // SYNOPSIS STOP
  24 */
  25
  26 #ifndef TABLE_DOT_H
  27 #define TABLE_DOT_H
  28
  29 #ifdef __GNUG__
  30 #pragma interface "dbtable.h"
  31 #endif
  32
  33 #include "wx/db.h"
  34
  35 const int ROWID_LEN = 24;  // 18 is the max, 24 is in case it gets larger
  36
  37 // The following class is used to define a column of a table.
  38 // The wxTable constructor will dynamically allocate as many of
  39 // these as there are columns in the table.  The class derived
  40 // from wxTable must initialize these column definitions in it's
  41 // constructor.  These column definitions provide inf. to the
  42 // wxTable class which allows it to create a table in the data
  43 // source, exchange data between the data source and the C++
  44 // object, and so on.
  45
  46 class CcolDef
  47 {
  48 public:
  49         char    ColName[DB_MAX_COLUMN_NAME_LEN+1];      // Column Name  glt 4/19/97 added one for the null terminator
  50         int     DbDataType;                                                                     // Logical Data Type; e.g. DB_DATA_TYPE_INTEGER
  51         int     SqlCtype;                                                                               // C data type; e.g. SQL_C_LONG
  52         void   *PtrDataObj;                                                                     // Address of the data object
  53         int       SzDataObj;                                                                    // Size, in bytes, of the data object
  54         bool      KeyField;                                                                             // TRUE if this column is part of the PRIMARY KEY to the table; Date fields should NOT be KeyFields.
  55         bool      Updateable;                                                                   // Specifies whether this column is updateable
  56         bool    InsertAllowed;                                                          // Specifies whether this column should be included in an INSERT statement
  57         bool    DerivedCol;                                                                     // Specifies whether this column is a derived value
  58         SDWORD  CbValue;                                                                                // Internal use only!!!
  59 };  // CcolDef
  60
  61 // This structure is used when creating secondary indexes.
  62 class CidxDef
  63 {
  64 public:
  65         char ColName[DB_MAX_COLUMN_NAME_LEN+1]; // Column Name  glt 4/19/97 added one for the null terminator
  66         bool Ascending;
  67 };  // CidxDef
  68
  69 class wxTable
  70 {
  71 private:
  72
  73         // Private member variables
  74         int currCursorNo;
  75
  76         // Private member functions
  77         bool bindInsertParams(void);
  78         bool bindUpdateParams(void);
  79         bool bindCols(HSTMT cursor);
  80         bool getRec(UWORD fetchType);
  81         bool execDelete(char *pSqlStmt);
  82         bool execUpdate(char *pSqlStmt);
  83         bool query(int queryType, bool forUpdate, bool distinct, char *pSqlStmt = 0);
  84
  85 public:
  86
  87         // Pointer to the database object this table belongs to
  88         wxDB *pDb;
  89
  90         // ODBC Handles
  91         HENV  henv;                                                     // ODBC Environment handle
  92         HDBC  hdbc;                                                     // ODBC DB Connection handle
  93         HSTMT hstmt;                                            // ODBC Statement handle
  94 //      HSTMT c0, c1, c2, c3, c4, c5;   // Cursors 0 through 5
  95         HSTMT c0, c1, c2;                                       // Limited to Cursors 0 through 2 for now
  96         HSTMT hstmtInsert;                              // ODBC Statement handle used specifically for inserts
  97         HSTMT hstmtDelete;                              // ODBC Statement handle used specifically for deletes
  98         HSTMT hstmtUpdate;                              // ODBC Statement handle used specifically for updates
  99         HSTMT hstmtCount;                                       // ODBC Statement handle used specifically for COUNT(*)
 100
 101         // Table Inf.
 102         char tableName[DB_MAX_TABLE_NAME_LEN+1];                        // Table name
 103         char queryTableName[DB_MAX_TABLE_NAME_LEN+1];   // Query Table Name
 104         int  noCols;                                                                                            // # of columns in the table
 105
 106         // Column Definitions
 107         CcolDef *colDefs;       // Array of CcolDef structures
 108
 109         // Where, Order By and From clauses
 110         char *where;                    // Standard SQL where clause, minus the word WHERE
 111         char *orderBy;                  // Standard SQL order by clause, minus the ORDER BY
 112         char *from;                             // Allows for joins in a Ctable::Query().  Format: ",tbl,tbl..."
 113
 114         // Flags
 115         bool selectForUpdate;
 116
 117         // Public member functions
 118         wxTable(wxDB *pwxDB, const char *tblName, const int nCols, const char *qryTblName = 0);
 119         virtual ~wxTable();
 120         bool    Open(void);
 121         bool    CreateTable(void);
 122         bool    CreateIndex(char * idxName, bool unique, int noIdxCols, CidxDef *pIdxDefs);
 123         bool    CloseCursor(HSTMT cursor);
 124         int   Insert(void);
 125         bool    Update(void);
 126         bool    Update(char *pSqlStmt);
 127         bool    UpdateWhere(char *pWhereClause);
 128         bool    Delete(void);
 129         bool    DeleteWhere(char *pWhereClause);
 130         bool    DeleteMatching(void);
 131         virtual bool Query(bool forUpdate = FALSE, bool distinct = FALSE);
 132         bool    QueryBySqlStmt(char *pSqlStmt);
 133         bool    QueryMatching(bool forUpdate = FALSE, bool distinct = FALSE);
 134         bool    QueryOnKeyFields(bool forUpdate = FALSE, bool distinct = FALSE);
 135         bool    GetNext(void)   { return(getRec(SQL_FETCH_NEXT));  }
 136         bool    operator++(int) { return(getRec(SQL_FETCH_NEXT));  }
 137 #ifndef FWD_ONLY_CURSORS
 138         bool    GetPrev(void)   { return(getRec(SQL_FETCH_PRIOR)); }
 139         bool    operator--(int) { return(getRec(SQL_FETCH_PRIOR)); }
 140         bool    GetFirst(void)  { return(getRec(SQL_FETCH_FIRST)); }
 141         bool    GetLast(void)   { return(getRec(SQL_FETCH_LAST));  }
 142 #endif
 143         bool    IsCursorClosedOnCommit(void);
 144         bool    IsColNull(int colNo);
 145         UWORD GetRowNum(void);
 146         void  GetSelectStmt(char *pSqlStmt, int typeOfSelect, bool distinct);
 147         void  GetDeleteStmt(char *pSqlStmt, int typeOfDel, char *pWhereClause = 0);
 148         void  GetUpdateStmt(char *pSqlStmt, int typeOfUpd, char *pWhereClause = 0);
 149         void  GetWhereClause(char *pWhereClause, int typeOfWhere, char *qualTableName = 0);
 150         bool    CanSelectForUpdate(void);
 151         bool    CanUpdByROWID(void);
 152         void  ClearMemberVars(void);
 153         bool    SetQueryTimeout(UDWORD nSeconds);
 154         void  SetColDefs (int index, char *fieldName, int dataType, void *pData, int cType,
 155                                                         int size, bool keyField = FALSE, bool upd = TRUE,
 156                                                         bool insAllow = TRUE, bool derivedCol = FALSE);
 157         bool    SetCursor(int cursorNo = DB_CURSOR0);
 158         int     GetCursor(void) { return(currCursorNo); }
 159         ULONG Count(void);
 160         int   DB_STATUS(void) { return(pDb->DB_STATUS); }
 161         bool    Refresh(void);
 162
 163 };  // wxTable
 164
 165 #endif