mirror of https://gitee.com/bigwinds/arangodb
136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief AQL CalculationBlock
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2010-2014 triagens GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// @author Max Neunhoeffer
|
|
/// @author Copyright 2014, triagens GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGODB_AQL_CALCULATION_BLOCK_H
|
|
#define ARANGODB_AQL_CALCULATION_BLOCK_H 1
|
|
|
|
#include "Aql/ExecutionBlock.h"
|
|
#include "Aql/ExecutionNode.h"
|
|
#include "Utils/AqlTransaction.h"
|
|
|
|
namespace triagens {
|
|
namespace aql {
|
|
|
|
class AqlItemBlock;
|
|
|
|
class ExecutionEngine;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- CalculationBlock
|
|
// -----------------------------------------------------------------------------
|
|
|
|
class CalculationBlock : public ExecutionBlock {
|
|
|
|
public:
|
|
|
|
CalculationBlock (ExecutionEngine*,
|
|
CalculationNode const*);
|
|
|
|
~CalculationBlock ();
|
|
|
|
int initialize () override;
|
|
|
|
private:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief fill the target register in the item block with a reference to
|
|
/// another variable
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void fillBlockWithReference (AqlItemBlock*);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief shared code for executing a simple or a V8 expression
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void executeExpression (AqlItemBlock*);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief doEvaluation, private helper to do the work
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void doEvaluation (AqlItemBlock*);
|
|
|
|
public:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief getSome
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AqlItemBlock* getSome (size_t atLeast,
|
|
size_t atMost) override final;
|
|
|
|
private:
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief we hold a pointer to the expression in the plan
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
Expression* _expression;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief info about input variables
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<Variable const*> _inVars;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief info about input registers
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
std::vector<RegisterId> _inRegs;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief output register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegisterId _outReg;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief condition variable register
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegisterId _conditionReg;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not the expression is a simple variable reference
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool _isReference;
|
|
|
|
};
|
|
|
|
} // namespace triagens::aql
|
|
} // namespace triagens
|
|
|
|
#endif
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
|
|
// End:
|