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58eb21aa5d
Now that all aggregate functions are derived from stateless_aggregate_function_adapter, we can just fold its functionality into the base class. This exposes stateless_aggregate_function to all users of aggregate_function, so they can begin to benefit from the transformation, though this patch doesn't touch those users. The aggregate_function base class is partiallly devirtualized since there is just a single implementation now.
46 lines
1.4 KiB
C++
46 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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#include "db/functions/stateless_aggregate_function.hh"
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#include "data_dictionary/keyspace_element.hh"
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namespace cql3 {
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namespace functions {
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class user_aggregate : public db::functions::aggregate_function, public data_dictionary::keyspace_element {
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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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bool has_finalfunc() const;
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virtual sstring keypace_name() const override { return name().keyspace; }
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virtual sstring element_name() const override { return name().name; }
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virtual sstring element_type() const override { return "aggregate"; }
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virtual std::ostream& describe(std::ostream& os) const override;
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seastar::shared_ptr<scalar_function> sfunc() const {
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return _agg.aggregation_function;
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}
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seastar::shared_ptr<scalar_function> reducefunc() const {
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return _agg.state_reduction_function;
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}
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seastar::shared_ptr<scalar_function> finalfunc() const {
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return _agg.state_to_result_function;
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}
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const bytes_opt& initcond() const {
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return _agg.initial_state;
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}
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};
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}
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}
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