/home/sebastian/gpudbms/trunk/cogadb/include/query_processing/selection_operator.hpp

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#pragma once

#include <query_processing/definitions.hpp>
#include <util/iostream.hpp>
#include <util/getname.hpp>
#include <sstream> 

#include <core/selection_expression.hpp>

namespace CoGaDB {
    namespace query_processing {
        namespace physical_operator {

            class CPU_Selection_Operator : public hype::queryprocessing::UnaryOperator<TablePtr, TablePtr> {
            public:
                typedef hype::queryprocessing::OperatorMapper_Helper_Template<TablePtr>::TypedOperatorPtr TypedOperatorPtr;

                CPU_Selection_Operator(const hype::SchedulingDecision& sched_dec,
                        TypedOperatorPtr child,
                        Predicate pred,
                        MaterializationStatus mat_stat = MATERIALIZE) : UnaryOperator<TablePtr, TablePtr>(sched_dec, child),
                        pred_(pred),
                mat_stat_(mat_stat) {
                }

                virtual bool execute() {
                    //std::cout << "Execute Selection CPU" << std::endl;
                    //const TablePtr sort(TablePtr table, const std::string& column_name, SortOrder order=ASCENDING, MaterializationStatus mat_stat=MATERIALIZE, ComputeDevice comp_dev=CPU);
                    //this->result_=BaseTable::sort(this->getInputData(), column_name_,order_, mat_stat_,CPU);
                    //this->result_ = BaseTable::selection(this->getInputData(), column_name_, value_for_comparison_, comp_, mat_stat_, SERIAL);
                    assert(pred_.getPredicateType()==ValueConstantPredicate);
                    this->result_ = BaseTable::selection(this->getInputData(), pred_.getColumn1Name(), pred_.getConstant(),pred_.getValueComparator(), mat_stat_, SERIAL);
                    
                    if (this->result_) {
                        setResultSize(((TablePtr) this->result_)->getNumberofRows());
                        return true;
                    } else
                        return false;
                }

                virtual ~CPU_Selection_Operator() {
                }
            private:
                Predicate pred_;
                MaterializationStatus mat_stat_;
            };

            class CPU_ParallelSelection_Operator : public hype::queryprocessing::UnaryOperator<TablePtr, TablePtr> {
            public:
                typedef hype::queryprocessing::OperatorMapper_Helper_Template<TablePtr>::TypedOperatorPtr TypedOperatorPtr;

                CPU_ParallelSelection_Operator(const hype::SchedulingDecision& sched_dec,
                        TypedOperatorPtr child,
                        Predicate pred,
                        MaterializationStatus mat_stat = MATERIALIZE) : UnaryOperator<TablePtr, TablePtr>(sched_dec, child),
                        pred_(pred),
                mat_stat_(mat_stat) {
                }

                virtual bool execute() {
                    assert(pred_.getPredicateType()==ValueConstantPredicate);
                    this->result_ = BaseTable::selection(this->getInputData(), pred_.getColumn1Name(), pred_.getConstant(),pred_.getValueComparator(), mat_stat_, PARALLEL);

                    if (this->result_) {
                        setResultSize(((TablePtr) this->result_)->getNumberofRows());
                        return true;
                    } else
                        return false;
                }

                virtual ~CPU_ParallelSelection_Operator() {
                }
            private:
                Predicate pred_;
                MaterializationStatus mat_stat_;
            };

            class GPU_Selection_Operator : public hype::queryprocessing::UnaryOperator<TablePtr, TablePtr> {
            public:
                typedef hype::queryprocessing::OperatorMapper_Helper_Template<TablePtr>::TypedOperatorPtr TypedOperatorPtr;

                GPU_Selection_Operator(const hype::SchedulingDecision& sched_dec,
                        TypedOperatorPtr child,
                        Predicate pred,
                        MaterializationStatus mat_stat = MATERIALIZE) : UnaryOperator<TablePtr, TablePtr>(sched_dec, child),
                        pred_(pred),
                mat_stat_(mat_stat) {
                }

                virtual bool execute() {
                    //std::cout << "Execute Selection GPU" << std::endl;
                    //const TablePtr sort(TablePtr table, const std::string& column_name, SortOrder order=ASCENDING, MaterializationStatus mat_stat=MATERIALIZE, ComputeDevice comp_dev=CPU);
                    //this->result_ = BaseTable::selection(this->getInputData(), column_name_, value_for_comparison_, comp_, mat_stat_, PARALLEL, GPU);
                    assert(pred_.getPredicateType()==ValueConstantPredicate);
                    this->result_ = BaseTable::selection(this->getInputData(), pred_.getColumn1Name(), pred_.getConstant(),pred_.getValueComparator(), mat_stat_, PARALLEL, GPU);
                    
                    
                    if (this->result_){
                        setResultSize(((TablePtr) this->result_)->getNumberofRows());
                        return true;
                     } else
                        return false;
                }

                virtual ~GPU_Selection_Operator() {
                }
            private:
                Predicate pred_;
                MaterializationStatus mat_stat_;
            };

            Physical_Operator_Map_Ptr map_init_function_selection_operator();
            TypedOperatorPtr create_CPU_Selection_Operator(TypedLogicalNode& logical_node, const hype::SchedulingDecision&, TypedOperatorPtr left_child, TypedOperatorPtr right_child);
            TypedOperatorPtr create_CPU_ParallelSelection_Operator(TypedLogicalNode& logical_node, const hype::SchedulingDecision&, TypedOperatorPtr left_child, TypedOperatorPtr right_child);
            TypedOperatorPtr create_GPU_Selection_Operator(TypedLogicalNode& logical_node, const hype::SchedulingDecision&, TypedOperatorPtr left_child, TypedOperatorPtr right_child);

        }//end namespace physical_operator

        //extern Map_Init_Function init_function_Selection_operator;

        //Map_Init_Function init_function_Selection_operator=physical_operator::map_init_function_Selection_operator; //boost::bind();

        namespace logical_operator {

                        class Logical_Selection : public hype::queryprocessing::TypedNode_Impl<TablePtr,physical_operator::map_init_function_selection_operator> //init_function_Selection_operator>
            {
            public:

                Logical_Selection(std::string column_name,
                        const boost::any& value_for_comparison,
                        const ValueComparator& comp,
                        MaterializationStatus mat_stat = MATERIALIZE,
                        hype::DeviceConstraint dev_constr = hype::DeviceConstraint()
                        ) : TypedNode_Impl<TablePtr, physical_operator::map_init_function_selection_operator>(false, dev_constr),
                        pred_(Predicate(column_name,value_for_comparison,ValueConstantPredicate,comp)), mat_stat_(mat_stat) {
                }
                        
                Logical_Selection(Predicate pred,
                        MaterializationStatus mat_stat = MATERIALIZE,
                        hype::DeviceConstraint dev_constr = hype::DeviceConstraint()
                        ) : TypedNode_Impl<TablePtr, physical_operator::map_init_function_selection_operator>(false, dev_constr),
                        pred_(pred), mat_stat_(mat_stat) {
                }

                virtual unsigned int getOutputResultSize() const {
                    return 10;
                }

                virtual double getCalculatedSelectivity() const {
                    return 0.1;
                }

                virtual std::string getOperationName() const {
                    return "SELECTION";
                }
                std::string toString(bool verbose) const{
                    std::string result="SELECTION";
                    if(verbose){
                        result+=" ";
                        result+=pred_.toString();
                    }
                    return result;

                }
                const Predicate& getPredicate(){
                   return pred_;
                }
                
                const MaterializationStatus getMaterializationStatus() const{
                    return mat_stat_;
                }
            private:
                Predicate pred_;
                MaterializationStatus mat_stat_;
            };

        }//end namespace logical_operator

    }//end namespace query_processing

}; //end namespace CogaDB