include/OrderTableImpl.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 ORDERTABLE_IMPL_H
  17 #define ORDERTABLE_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 #include<TableImpl.h>
  29 #include<OrderByTree.h>
  30
  31 class DllExport OrderTableImpl:public Table
  32 {
  33     private:
  34     char tblName_[IDENTIFIER_LENGTH];
  35     void *curTuple; //holds the current tuple ptr. moved during fetch() calls
  36     List fldProjList;
  37     List fldOrderByList;
  38     Table *tableHdl;
  39     List sortList; //change this list to some other data structure
  40     ListIterator sortIter;
  41     OrderByTree sortTree;
  42     long long nullValues;
  43     int orderBySize;
  44     int projSize;
  45     char *orderBuffer;
  46     void *orderBindBuf;
  47     bool isPlanCreated;
  48
  49     DbRetVal copyValuesToBindBuffer(void *tuple);
  50     void setNullableForProj();
  51     public:
  52     OrderTableImpl();
  53     virtual ~OrderTableImpl();
  54     DbRetVal getFieldInfo(const char *fieldName,  FieldInfo *&info)
  55         { return tableHdl->getFieldInfo(fieldName, info); }
  56     void setTable(Table *impl){ tableHdl = impl;}
  57     Table* getTableHdl(){ return tableHdl; }
  58     DbRetVal closeScan();
  59     void *getBindFldAddr(const char *name);
  60     DbRetVal bindFld(const char *name, void *val, bool dummy = false);
  61     void setProjList(List bindFldList) { fldProjList = bindFldList; }
  62     DbRetVal setOrderBy(const char *name, bool isDesc=false);
  63     DbRetVal setOrderByList(List orderList);
  64     void setDistinct() { sortTree.setDistinct(true); }
  65     OrderByType getOrderType();
  66     void checkAndSetSortAlgorithm();
  67     DbRetVal markFldNull(const char *name){ return ErrBadCall;}
  68     DbRetVal markFldNull(int colpos){ return ErrBadCall;}
  69     bool isFldNull(const char *name);
  70     bool isFldNull(int colpos);
  71     void clearFldNull(const char *name){}
  72     void clearFldNull(int colpos){}
  73     DbRetVal compact(){ return ErrBadCall;}
  74     int getFldPos(char *name){ return 0;}
  75     void resetNullinfo(){}
  76     DbRetVal insertTuple() { return ErrBadCall; }
  77     DbRetVal updateTuple() { return ErrBadCall; }
  78     DbRetVal deleteTuple() { return ErrBadCall; }
  79     int deleteWhere() { return ErrBadCall; }
  80     int truncate() { return ErrBadCall; }
  81     long spaceUsed() { return 0; }
  82     int pagesUsed() { return 0; }
  83     DbRetVal lock(bool shared) { return ErrBadCall; }
  84     DbRetVal unlock(){ return ErrBadCall; }
  85     DbRetVal setUndoLogging(bool flag) { return ErrBadCall; }
  86     void printSQLIndexString(FILE *fp, int fd){ };
  87     void printSQLForeignString(){}
  88     char* getName() { return tableHdl->getName(); }
  89     char* getAliasName(){return tableHdl->getAliasName(); }
  90     List getFieldNameList(){ List dummyList; return dummyList;}
  91     DbRetVal execute();
  92     DbRetVal insert();
  93     DbRetVal insertDistinct();
  94     void* fetch();
  95     void* fetch(DbRetVal &rv);
  96     void* fetchNoBind();
  97     void* fetchNoBind(DbRetVal &rv);
  98     DbRetVal close();
  99     long numTuples();
 100     void printInfo();
 101     bool pushPredicate(Predicate *pred)
 102         { printf("Wrong call\n"); return false; }
 103     void setPredicate(Predicate *pred)
 104         { printf("Wrong call\n"); }
 105     bool isTableInvolved(char *tableName)
 106         { printf("Wrong call\n"); return false; }
 107     void printPlan(int space);
 108     DbRetVal optimize()
 109         { printf("Wrong call\n"); return OK; }
 110     bool isFKTable(){return false;}
 111     ScanType getScanType(){ return unknownScan;}
 112     bool hasIndex(char *fName){ return false;}
 113     void setCondition(Condition *) {}
 114     int computeOrderBySize();
 115 };
 116
 117 #endif