147 lines
3.9 KiB
C++
147 lines
3.9 KiB
C++
/*
|
|
----
|
|
This file is part of SECONDO.
|
|
|
|
Copyright (C) 2004, University in Hagen, Department of Computer Science,
|
|
Database Systems for New Applications.
|
|
|
|
SECONDO is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
SECONDO is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with SECONDO; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
----
|
|
|
|
//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
|
|
//paragraph [10] Footnote: [{\footnote{] [}}]
|
|
//[TOC] [\tableofcontents]
|
|
|
|
[1] Implementation of Module Ordered Relation Algebra
|
|
|
|
Winter 2009 Nicolai Voget
|
|
|
|
[TOC]
|
|
|
|
1 Overview
|
|
|
|
This file provides some extensions for the class Tuple which is defined in
|
|
RelationAlgebra.h.
|
|
|
|
2 Defines, includes, and constants
|
|
|
|
*/
|
|
#include "Algebras/Relation-C++/RelationAlgebra.h"
|
|
|
|
using namespace std;
|
|
|
|
void Tuple::SaveOrel(SmiRecord* record, SmiFileId& lobFileId, double& extSize,
|
|
double& size, vector<double>& attrExtSize,
|
|
vector<double>& attrSize, bool ignoreFlobs,
|
|
TupleId tupleId) {
|
|
extSize += tupleType->GetCoreSize();
|
|
size += tupleType->GetCoreSize();
|
|
size_t coreSize = 0;
|
|
size_t extensionSize = CalculateBlockSize(coreSize, extSize, size,
|
|
attrExtSize, attrSize);
|
|
char* data = WriteToBlock(coreSize, extensionSize, ignoreFlobs,
|
|
tupleFile, lobFileId);
|
|
bool rc = record->Write(data, sizeof(uint16_t)+coreSize+extensionSize, 0);
|
|
assert(rc==true);
|
|
free(data);
|
|
}
|
|
|
|
bool Tuple::OpenOrel(SmiFileId fileId,SmiFileId lobfileId,
|
|
SmiRecord& record, TupleId tupleId )
|
|
{
|
|
this->tupleId = tupleId;
|
|
this->tupleFile = 0;
|
|
this->lobFileId = lobfileId;
|
|
return ReadFrom( fileId, record );
|
|
}
|
|
|
|
bool Tuple::OpenOrel(SmiFileId fileId, SmiFileId lobfileId,
|
|
PrefetchingIterator *iter, TupleId tupleId )
|
|
{
|
|
TRACE_ENTER
|
|
DEBUG_MSG("Open::Prefetch")
|
|
|
|
this->tupleFile = 0;
|
|
this->lobFileId = lobfileId;
|
|
this->tupleId = tupleId;
|
|
|
|
uint16_t rootSize = 0;
|
|
char* data = GetSMIBufferData(iter, rootSize);
|
|
|
|
if (data) {
|
|
InitializeAttributes(fileId, data);
|
|
free ( data );
|
|
return true;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
|
|
TRACE_LEAVE
|
|
}
|
|
|
|
|
|
bool Tuple::OpenPartialOrel( SmiFileId fileId,
|
|
TupleType* newtype, const list<int>& attrIdList,
|
|
SmiFileId lobfileId,
|
|
PrefetchingIterator *iter,
|
|
TupleId tupleId)
|
|
{
|
|
TRACE_ENTER
|
|
DEBUG_MSG("OpenPartial using PrefetchingIterator")
|
|
|
|
this->tupleId = tupleId;
|
|
this->tupleFile = 0;
|
|
this->lobFileId = lobfileId;
|
|
|
|
uint16_t rootSize = 0;
|
|
char* data = GetSMIBufferData(iter, rootSize);
|
|
|
|
if (data) {
|
|
InitializeSomeAttributes(fileId, attrIdList, data);
|
|
ChangeTupleType(newtype, attrIdList);
|
|
free ( data );
|
|
return true;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
|
|
TRACE_LEAVE
|
|
}
|
|
|
|
void Tuple::UpdateAttributesOrel( const vector<int>& changedIndices,
|
|
const vector<Attribute*>& newAttrs )
|
|
{
|
|
int index;
|
|
for ( size_t i = 0; i < changedIndices.size(); i++)
|
|
{
|
|
index = changedIndices[i];
|
|
assert( index >= 0 && index < GetNoAttributes() );
|
|
assert( attributes[index] != 0 );
|
|
for (int j = 0;
|
|
j < attributes[index]->NumOfFLOBs();
|
|
j++)
|
|
{
|
|
Flob *tmpFlob = attributes[index]->GetFLOB(j);
|
|
|
|
tmpFlob->destroy();
|
|
}
|
|
|
|
attributes[index]->DeleteIfAllowed();
|
|
attributes[index] = newAttrs[i];
|
|
}
|
|
}
|