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0f08c8e099
Introduces reducible aggregates which don't return final result but accumulator, that can be later reduced.
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright (C) 2021-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include "abstract_function.hh"
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#include "scalar_function.hh"
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#include "aggregate_function.hh"
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namespace cql3 {
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namespace functions {
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class user_aggregate : public abstract_function, public aggregate_function{
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bytes_opt _initcond;
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::shared_ptr<scalar_function> _sfunc;
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::shared_ptr<scalar_function> _reducefunc;
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::shared_ptr<scalar_function> _finalfunc;
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public:
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user_aggregate(function_name fname, bytes_opt initcond, ::shared_ptr<scalar_function> sfunc, ::shared_ptr<scalar_function> reducefunc, ::shared_ptr<scalar_function> finalfunc);
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virtual std::unique_ptr<aggregate_function::aggregate> new_aggregate() override;
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virtual ::shared_ptr<aggregate_function> reducible_aggregate_function() override;
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virtual bool is_pure() const override;
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virtual bool is_native() const override;
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virtual bool is_aggregate() const override;
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virtual bool is_reducible() const override;
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virtual bool requires_thread() const override;
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bool has_finalfunc() const;
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const scalar_function& sfunc() const {
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return *_sfunc;
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}
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const scalar_function& reducefunc() const {
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return *_reducefunc;
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}
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const scalar_function& finalfunc() const {
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return *_finalfunc;
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}
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const bytes_opt& initcond() const {
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return _initcond;
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}
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};
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}
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}
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