mirror of
https://github.com/scylladb/scylladb.git
synced 2026-04-22 17:40:34 +00:00
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++
/*
|
|
* Copyright (C) 2021-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "abstract_function.hh"
|
|
#include "scalar_function.hh"
|
|
#include "aggregate_function.hh"
|
|
|
|
namespace cql3 {
|
|
namespace functions {
|
|
|
|
class user_aggregate : public abstract_function, public aggregate_function{
|
|
bytes_opt _initcond;
|
|
::shared_ptr<scalar_function> _sfunc;
|
|
::shared_ptr<scalar_function> _reducefunc;
|
|
::shared_ptr<scalar_function> _finalfunc;
|
|
public:
|
|
user_aggregate(function_name fname, bytes_opt initcond, ::shared_ptr<scalar_function> sfunc, ::shared_ptr<scalar_function> reducefunc, ::shared_ptr<scalar_function> finalfunc);
|
|
virtual std::unique_ptr<aggregate_function::aggregate> new_aggregate() override;
|
|
virtual ::shared_ptr<aggregate_function> reducible_aggregate_function() override;
|
|
virtual bool is_pure() const override;
|
|
virtual bool is_native() const override;
|
|
virtual bool is_aggregate() const override;
|
|
virtual bool is_reducible() const override;
|
|
virtual bool requires_thread() const override;
|
|
bool has_finalfunc() const;
|
|
|
|
const scalar_function& sfunc() const {
|
|
return *_sfunc;
|
|
}
|
|
const scalar_function& reducefunc() const {
|
|
return *_reducefunc;
|
|
}
|
|
const scalar_function& finalfunc() const {
|
|
return *_finalfunc;
|
|
}
|
|
const bytes_opt& initcond() const {
|
|
return _initcond;
|
|
}
|
|
};
|
|
|
|
}
|
|
}
|