include/AggTableImpl.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 AGGTABLE_IMPL_H
  17 #define AGGTABLE_IMPL_H
  18 #include<os.h>
  19 #include<DataType.h>
  20 #include<Transaction.h>
  21 #include<Database.h>
  22 #include<Index.h>
  23 #include<CatalogTables.h>
  24 #include<Info.h>
  25 #include<Debug.h>
  26 #include<DatabaseManagerImpl.h>
  27 #include<Predicate.h>
  28 enum AggType
  29 {
  30     AGG_MIN = 1,
  31     AGG_MAX,
  32     AGG_SUM,
  33     AGG_AVG,
  34     AGG_COUNT,
  35     AGG_UNKNOWN
  36 };
  37 class AggFldDef
  38 {
  39     public:
  40     char fldName[IDENTIFIER_LENGTH];
  41     DataType type;
  42     int length;
  43     void *bindBuf;
  44     void *appBuf;
  45     AggType atype;
  46     bool alreadyBinded;
  47     AggFldDef()
  48     {
  49         strcpy(fldName, "");
  50         type=typeUnknown;
  51         length=0;
  52         bindBuf=NULL;
  53         appBuf=NULL;
  54         atype=AGG_UNKNOWN;
  55         alreadyBinded=false;
  56     }
  57 };
  58
  59 class AggTableImpl:public Table
  60 {
  61     private:
  62     char tblName_[IDENTIFIER_LENGTH];
  63     void *curTuple; //holds the current tuple ptr. moved during fetch() calls
  64     List fldList;
  65     AggFldDef groupFld;
  66     Table *tableHdl;
  67     List aggNodes; //change this list to some other data structure
  68     ListIterator aggNodeIter;
  69
  70     int aggNodeSize;
  71     DbRetVal copyValuesToBindBuffer(void *tuple);
  72     public:
  73     AggTableImpl();
  74     virtual ~AggTableImpl();
  75     DbRetVal getFieldInfo(const char *fieldName,  FieldInfo *&info)
  76         { return ErrBadCall; }
  77     bool isGroupSet()
  78         {
  79         if (groupFld.type == typeUnknown) return false; else return true;
  80         }
  81     void* insertOrGet();
  82     void setTable(Table *impl){ tableHdl = impl;}
  83     Table* getTableHdl(){ return tableHdl; }
  84     void closeScan();
  85     void *getBindFldAddr(const char *name);
  86     DbRetVal bindFld(const char *name, void *val);
  87     DbRetVal bindFld(const char *name, AggType aggType, void *val);
  88     DbRetVal setGroup(const char *name, void *val);
  89     void setCondition(Condition *p){}
  90     void markFldNull(const char *name){}
  91     void markFldNull(int colpos){}
  92     bool isFldNull(const char *name){return false;}
  93     bool isFldNull(int colpos){return false;}
  94     void clearFldNull(const char *name){}
  95     void clearFldNull(int colpos){}
  96     int getFldPos(char *name){}
  97     void resetNullinfo(){}
  98     DbRetVal insertTuple() { return ErrBadCall; }
  99     DbRetVal updateTuple() { return ErrBadCall; }
 100     DbRetVal deleteTuple() { return ErrBadCall; }
 101     int deleteWhere() { return ErrBadCall; }
 102     int truncate() { return ErrBadCall; }
 103     long spaceUsed() { return 0; }
 104     int pagesUsed() { return 0; }
 105     DbRetVal lock(bool shared) { return ErrBadCall; }
 106     DbRetVal unlock(){ return ErrBadCall; }
 107     DbRetVal setUndoLogging(bool flag) { return ErrBadCall; }
 108     void printSQLIndexString(){ };
 109     char* getName() { return tableHdl->getName(); }
 110     List getFieldNameList(){ List list; return list;}
 111     DbRetVal execute();
 112     void* fetch();
 113     void* fetch(DbRetVal &rv);
 114     void* fetchNoBind();
 115     void* fetchNoBind(DbRetVal &rv);
 116     DbRetVal close();
 117     long numTuples();
 118     void printInfo();
 119 };
 120
 121 #endif