include/OrderByTree.h

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.com                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  ***************************************************************************/
  16 #ifndef ORDERBYTREE_H
  17 #define ORDERBYTREE_H
  18 #include<os.h>
  19 #include<Util.h>
  20 #include<DataType.h>
  21 #include<HeapAllocator.h>
  22
  23 class DllExport OrderByFldDef
  24 {
  25     public:
  26     char fldName[IDENTIFIER_LENGTH];
  27     DataType type;
  28     int length;
  29     void *bindBuf;
  30     bool isDesc;
  31     bool alreadyBinded;
  32     bool isNull;
  33     int fldPos;
  34     OrderByFldDef()
  35     {
  36         strcpy(fldName, "");
  37         type=typeUnknown;
  38         length=0;
  39         bindBuf=NULL;
  40         isDesc= false;
  41         alreadyBinded=false;
  42         isNull = false;
  43         fldPos=0;
  44     }
  45 };
  46
  47 enum OrderByType
  48 {
  49     Asc=0,
  50     Desc,
  51     UnKnown,
  52 };
  53 class DllExport OrderByTree
  54 {
  55     OrderByType type;
  56     int keySize;
  57     bool isDistinct;
  58     List dataNode;
  59     List orderByList;
  60     bool fullOrderBy;
  61     HashMap projMap; //used in distinct projection
  62
  63     public:
  64     OrderByTree(){ isDistinct =false; fullOrderBy = false; keySize=0; type = UnKnown; dataNode.reset();}
  65     DbRetVal insertDataNode(void *data);
  66     bool find(void *data);
  67
  68     //Used for float type field and individual order by clause
  69     void insertSpecialCaseDataNode(void *data);
  70
  71     void setKeySize(int size){ keySize = size; projMap.setKeySize(size);}
  72     int getKeySize(){return keySize;}
  73     void setDistinct(bool dist){ isDistinct = dist;}
  74     bool getDistinct(){return isDistinct;}
  75     void setOrderByType(OrderByType oType){ type = oType;}
  76     OrderByType getOrderByType(){ return type; }
  77     int compare(void *element1,void *element2,int size);
  78     ListIterator getListIterator();
  79     void setOrderByList(List oList) { orderByList = oList; }
  80     void setFullOrderBy() {fullOrderBy = true; }
  81     void setOrdIntNoNull() { projMap.setGrpIntNoNull(); }
  82     void removeAll();
  83 };
  84
  85 #endif