48978fd0b4
Due to cyclic dependencies, three classes are converted at once: abstract_function_selector scalar_function_selector aggregate_function_selector
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Modified by Cloudius Systems
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* Copyright 2015 Cloudius Systems
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*/
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#include "abstract_function_selector.hh"
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#include "aggregate_function_selector.hh"
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#include "scalar_function_selector.hh"
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#include "to_string.hh"
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namespace cql3 {
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namespace selection {
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shared_ptr<selector::factory>
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abstract_function_selector::new_factory(shared_ptr<functions::function> fun, shared_ptr<selector_factories> factories) {
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if (fun->is_aggregate()) {
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if (factories->does_aggregation()) {
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throw exceptions::invalid_request_exception("aggregate functions cannot be used as arguments of aggregate functions");
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}
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} else {
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if (factories->does_aggregation() && !factories->contains_only_aggregate_functions()) {
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throw exceptions::invalid_request_exception(sprint("the %s function arguments must be either all aggregates or all none aggregates",
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fun->name()));
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}
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}
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struct fun_selector_factory : public factory {
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shared_ptr<functions::function> _fun;
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shared_ptr<selector_factories> _factories;
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fun_selector_factory(shared_ptr<functions::function> fun,
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shared_ptr<selector_factories> factories)
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: _fun(std::move(fun)), _factories(std::move(factories)) {
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}
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virtual sstring column_name() override {
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return sprint("%s(%s)", _fun->name(), join(", ", _factories->get_column_names()));
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}
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virtual data_type get_return_type() override {
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return _fun->return_type();
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}
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virtual bool uses_function(const sstring& ks_name, const sstring& function_name) override {
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return _fun->uses_function(ks_name, function_name);
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}
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virtual shared_ptr<selector> new_instance() override {
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using ret_type = shared_ptr<selector>;
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return _fun->is_aggregate() ? ret_type(::make_shared<aggregate_function_selector>(_fun, _factories->new_instances()))
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: ret_type(::make_shared<scalar_function_selector>(_fun, _factories->new_instances()));
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}
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virtual bool is_write_time_selector_factory() override {
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return _factories->contains_write_time_selector_factory();
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}
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virtual bool is_ttl_selector_factory() override {
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return _factories->contains_ttl_selector_factory();
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}
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virtual bool is_aggregate_selector_factory() override {
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return _fun->is_aggregate() || _factories->contains_only_aggregate_functions();
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}
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};
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return make_shared<fun_selector_factory>(std::move(fun), std::move(factories));
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}
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}
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}
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