89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004-2009, University in Hagen, Faculty of Mathematics
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and Computer Science, Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#pragma once
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#include "AlgebraTypes.h"
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#include "NestedList.h"
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#include "Operator.h"
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#include "Algebras/Relation-C++/RelationAlgebra.h"
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#include "SecondoSMI.h"
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#include "Shared.h"
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#include "Stream.h"
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#include "../TBlock.h"
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namespace CRelAlgebra
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{
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namespace Operators
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{
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/*
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Operator implementation of the 'cconsume' operator.
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This operator appends a stream of tuples or tuple-blocks to a new
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column oriented relation.
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The Operator expects two parameters.
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The first parameter represents the incoming values and must be either a
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stream of 'tuple' or a stream of 'tblock'.
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The second parameter represents the:
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*desired block-size: must be of type 'int'.
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*type of the relation (template): must be of type 'crel'
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The returned value represents the relation and is of type 'crel'.
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*/
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class ToBlocks : public Operator
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{
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public:
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ToBlocks();
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private:
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class State
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{
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public:
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State(ArgVector args, Supplier s);
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~State();
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TBlock *Request();
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private:
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const PTBlockInfo m_blockInfo;
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Stream<Tuple> m_stream;
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const uint64_t m_blockSize;
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const SmiFileId m_fileId;
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const Shared<SmiRecordFile> m_file;
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};
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static const OperatorInfo info;
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static ListExpr TypeMapping(ListExpr args);
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};
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}
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}
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