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127 lines
3.2 KiB
C++
Executable File
127 lines
3.2 KiB
C++
Executable File
/*
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Copyright (c) 2017, MariaDB
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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#ifndef UDAFCOLUMN_H
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#define UDAFCOLUMN_H
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#include <string>
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#include "calpontselectexecutionplan.h"
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#include "aggregatecolumn.h"
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#include "mcsv1_udaf.h"
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namespace messageqcpp {
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class ByteStream;
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}
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using namespace mcsv1sdk;
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/**
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* Namespace
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*/
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namespace execplan {
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/**
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* @brief A class to represent an aggregate return column
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*
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* This class is a specialization of class ReturnedColumn that
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* handles a user defined aggregate function (UDAF) call.
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*/
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class UDAFColumn : public AggregateColumn {
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public:
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/**
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* Constructors
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*/
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UDAFColumn();
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UDAFColumn(const uint32_t sessionID);
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UDAFColumn(const UDAFColumn& rhs, const uint32_t sessionID=0);
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/**
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* Destructors
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*/
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virtual ~UDAFColumn();
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/**
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* Overloaded stream operator
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*/
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virtual const std::string toString() const;
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/** return a copy of this pointer
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*
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* deep copy of this pointer and return the copy
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*/
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virtual UDAFColumn* clone() const { return new UDAFColumn(*this); }
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/**
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* Accessors and Mutators
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*/
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mcsv1Context& getContext() {return context;}
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/**
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* Serialize interface
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*/
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virtual void serialize(messageqcpp::ByteStream&) const;
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virtual void unserialize(messageqcpp::ByteStream&);
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/** @brief Do a deep, strict (as opposed to semantic) equivalence test
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*
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* Do a deep, strict (as opposed to semantic) equivalence test.
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* @return true iff every member of t is a duplicate copy of every member of this;
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* false otherwise
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*/
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virtual bool operator==(const TreeNode* t) const;
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/** @brief Do a deep, strict (as opposed to semantic) equivalence test
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*
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* Do a deep, strict (as opposed to semantic) equivalence test.
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* @return true iff every member of t is a duplicate copy of every member of this;
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* false otherwise
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*/
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virtual bool operator==(const UDAFColumn& t) const;
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/** @brief Do a deep, strict (as opposed to semantic) equivalence test
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*
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* Do a deep, strict (as opposed to semantic) equivalence test.
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* @return false iff every member of t is a duplicate copy of every member of this;
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* true otherwise
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*/
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virtual bool operator!=(const TreeNode* t) const;
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/** @brief Do a deep, strict (as opposed to semantic) equivalence test
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*
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* Do a deep, strict (as opposed to semantic) equivalence test.
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* @return false iff every member of t is a duplicate copy of every member of this;
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* true otherwise
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*/
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virtual bool operator!=(const UDAFColumn& t) const;
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private:
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mcsv1Context context;
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};
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/**
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* stream operator
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*/
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std::ostream& operator<<(std::ostream& os, const UDAFColumn& rhs);
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}
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#endif //UDAFCOLUMN_H
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