0fcda94162
Summary: Hardcoded query infrastructure - first concrete version - USEFUL FOR: POCs & pilots Test Plan: manual + jenkins Reviewers: sale, florijan Reviewed By: florijan Subscribers: pullbot, buda Differential Revision: https://phabricator.memgraph.io/D45
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#pragma once
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#include "communication/communication.hpp"
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#include "database/db.hpp"
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#include "database/db_accessor.hpp"
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#include "query/stripped.hpp"
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/**
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* @class PlanInterface
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*
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* @brief Pure Abstract class that is interface to query plans.
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*
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* @tparam Stream stream for results writing.
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*/
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template <typename Stream>
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class PlanInterface
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{
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public:
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/**
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* In derived classes this method has to be overriden in order to implement
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* concrete execution plan.
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*
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* @param db active database instance
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* @param args plan argument (vector of literal values from the query)
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* @param stream stream for results writing
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*
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* @return bool status after execution (success OR fail)
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*/
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virtual bool run(Db &db, const PlanArgsT &args, Stream &stream) = 0;
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/**
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* Virtual destructor in base class.
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*/
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virtual ~PlanInterface() {}
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};
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/**
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* Defines type of underlying extern C functions and library object class name.
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* (ObjectPrototype).
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*
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* @tparam underlying object depends on Stream template parameter because
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* it will send the results throughout a custom Stream object.
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*/
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template <typename Stream>
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struct QueryPlanTrait
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{
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using ObjectPrototype = PlanInterface<Stream>;
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using ProducePrototype = PlanInterface<Stream> *(*)();
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using DestructPrototype = void (*)(PlanInterface<Stream> *);
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};
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