d9337152f3
This adds a requires_thread predicate to functions and propagates that up until we get to code that already returns futures. We can then use the predicate to decide if we need to use seastar::async. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>
112 lines
4.2 KiB
C++
112 lines
4.2 KiB
C++
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
|
* or more contributor license agreements. See the NOTICE file
|
|
* distributed with this work for additional information
|
|
* regarding copyright ownership. The ASF licenses this file
|
|
* to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
/*
|
|
* Modified by ScyllaDB
|
|
* Copyright (C) 2015 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "abstract_function_selector.hh"
|
|
#include "aggregate_function_selector.hh"
|
|
#include "scalar_function_selector.hh"
|
|
#include "to_string.hh"
|
|
|
|
namespace cql3 {
|
|
|
|
namespace selection {
|
|
|
|
shared_ptr<selector::factory>
|
|
abstract_function_selector::new_factory(shared_ptr<functions::function> fun, shared_ptr<selector_factories> factories) {
|
|
if (fun->is_aggregate()) {
|
|
if (factories->does_aggregation()) {
|
|
throw exceptions::invalid_request_exception("aggregate functions cannot be used as arguments of aggregate functions");
|
|
}
|
|
} else {
|
|
if (factories->does_aggregation() && !factories->contains_only_aggregate_functions()) {
|
|
throw exceptions::invalid_request_exception(format("the {} function arguments must be either all aggregates or all none aggregates",
|
|
fun->name()));
|
|
}
|
|
}
|
|
|
|
struct fun_selector_factory : public factory {
|
|
shared_ptr<functions::function> _fun;
|
|
shared_ptr<selector_factories> _factories;
|
|
|
|
fun_selector_factory(shared_ptr<functions::function> fun,
|
|
shared_ptr<selector_factories> factories)
|
|
: _fun(std::move(fun)), _factories(std::move(factories)) {
|
|
}
|
|
|
|
virtual sstring column_name() override {
|
|
return _fun->column_name(_factories->get_column_names());
|
|
}
|
|
|
|
virtual data_type get_return_type() override {
|
|
return _fun->return_type();
|
|
}
|
|
|
|
virtual bool uses_function(const sstring& ks_name, const sstring& function_name) override {
|
|
return _fun->uses_function(ks_name, function_name);
|
|
}
|
|
|
|
virtual shared_ptr<selector> new_instance() override {
|
|
using ret_type = shared_ptr<selector>;
|
|
return _fun->is_aggregate() ? ret_type(::make_shared<aggregate_function_selector>(_fun, _factories->new_instances()))
|
|
: ret_type(::make_shared<scalar_function_selector>(_fun, _factories->new_instances()));
|
|
}
|
|
|
|
virtual bool is_write_time_selector_factory() override {
|
|
return _factories->contains_write_time_selector_factory();
|
|
}
|
|
|
|
virtual bool is_ttl_selector_factory() override {
|
|
return _factories->contains_ttl_selector_factory();
|
|
}
|
|
|
|
virtual bool is_aggregate_selector_factory() override {
|
|
return _fun->is_aggregate() || _factories->contains_only_aggregate_functions();
|
|
}
|
|
};
|
|
|
|
return make_shared<fun_selector_factory>(std::move(fun), std::move(factories));
|
|
}
|
|
|
|
bool scalar_function_selector::requires_thread() {
|
|
return fun()->requires_thread();
|
|
}
|
|
|
|
}
|
|
|
|
}
|