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70b09dcdf1
As a first step towards removing _temporaries from query options altogether, all usages of query_options::make_temporary are removed.
349 lines
15 KiB
C++
349 lines
15 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 ScyllaDB
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* Copyright (C) 2015 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "term.hh"
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#include "abstract_marker.hh"
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#include "types/tuple.hh"
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#include "types/collection.hh"
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class list_type_impl;
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namespace cql3 {
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/**
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* Static helper methods and classes for tuples.
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*/
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class tuples {
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public:
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static lw_shared_ptr<column_specification> component_spec_of(const column_specification& column, size_t component);
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/**
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* A raw, literal tuple. When prepared, this will become a Tuples.Value or Tuples.DelayedValue, depending
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* on whether the tuple holds NonTerminals.
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*/
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class literal : public term::multi_column_raw {
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std::vector<shared_ptr<term::raw>> _elements;
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public:
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literal(std::vector<shared_ptr<raw>> elements)
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: _elements(std::move(elements)) {
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}
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virtual shared_ptr<term> prepare(database& db, const sstring& keyspace, lw_shared_ptr<column_specification> receiver) const override;
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virtual shared_ptr<term> prepare(database& db, const sstring& keyspace, const std::vector<lw_shared_ptr<column_specification>>& receivers) const override;
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private:
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void validate_assignable_to(database& db, const sstring& keyspace, const column_specification& receiver) const {
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auto tt = dynamic_pointer_cast<const tuple_type_impl>(receiver.type->underlying_type());
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if (!tt) {
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throw exceptions::invalid_request_exception(format("Invalid tuple type literal for {} of type {}", receiver.name, receiver.type->as_cql3_type()));
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}
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for (size_t i = 0; i < _elements.size(); ++i) {
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if (i >= tt->size()) {
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throw exceptions::invalid_request_exception(format("Invalid tuple literal for {}: too many elements. Type {} expects {:d} but got {:d}",
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receiver.name, tt->as_cql3_type(), tt->size(), _elements.size()));
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}
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auto&& value = _elements[i];
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auto&& spec = component_spec_of(receiver, i);
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if (!assignment_testable::is_assignable(value->test_assignment(db, keyspace, *spec))) {
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throw exceptions::invalid_request_exception(format("Invalid tuple literal for {}: component {:d} is not of type {}", receiver.name, i, spec->type->as_cql3_type()));
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}
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}
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}
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public:
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virtual assignment_testable::test_result test_assignment(database& db, const sstring& keyspace, const column_specification& receiver) const override {
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try {
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validate_assignable_to(db, keyspace, receiver);
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return assignment_testable::test_result::WEAKLY_ASSIGNABLE;
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} catch (exceptions::invalid_request_exception& e) {
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return assignment_testable::test_result::NOT_ASSIGNABLE;
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}
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}
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virtual sstring to_string() const override {
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return tuple_to_string(_elements);
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}
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};
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/**
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* A tuple of terminal values (e.g (123, 'abc')).
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*/
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class value : public multi_item_terminal {
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public:
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std::vector<bytes_opt> _elements;
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public:
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value(std::vector<bytes_opt> elements)
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: _elements(std::move(elements)) {
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}
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value(std::vector<bytes_view_opt> elements)
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: value(to_bytes_opt_vec(std::move(elements))) {
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}
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static value from_serialized(const fragmented_temporary_buffer::view& buffer, const tuple_type_impl& type) {
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return with_linearized(buffer, [&] (bytes_view view) {
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return value(type.split(view));
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});
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}
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virtual cql3::raw_value get(const query_options& options) override {
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return cql3::raw_value::make_value(tuple_type_impl::build_value(_elements));
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}
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virtual const std::vector<bytes_opt>& get_elements() const override {
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return _elements;
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}
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size_t size() const {
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return _elements.size();
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}
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virtual sstring to_string() const override {
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return format("({})", join(", ", _elements));
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}
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};
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/**
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* Similar to Value, but contains at least one NonTerminal, such as a non-pure functions or bind marker.
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*/
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class delayed_value : public non_terminal {
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tuple_type _type;
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std::vector<shared_ptr<term>> _elements;
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public:
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delayed_value(tuple_type type, std::vector<shared_ptr<term>> elements)
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: _type(std::move(type)), _elements(std::move(elements)) {
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}
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virtual bool contains_bind_marker() const override {
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return std::any_of(_elements.begin(), _elements.end(), std::mem_fn(&term::contains_bind_marker));
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}
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virtual void collect_marker_specification(variable_specifications& bound_names) const override {
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for (auto&& term : _elements) {
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term->collect_marker_specification(bound_names);
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}
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}
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private:
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std::vector<bytes_opt> bind_internal(const query_options& options) {
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std::vector<bytes_opt> buffers;
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buffers.resize(_elements.size());
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for (size_t i = 0; i < _elements.size(); ++i) {
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const auto& value = _elements[i]->bind_and_get(options);
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if (value.is_unset_value()) {
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throw exceptions::invalid_request_exception(format("Invalid unset value for tuple field number {:d}", i));
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}
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buffers[i] = to_bytes_opt(value);
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// Inside tuples, we must force the serialization of collections to v3 whatever protocol
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// version is in use since we're going to store directly that serialized value.
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if (options.get_cql_serialization_format() != cql_serialization_format::internal()
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&& _type->type(i)->is_collection()) {
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if (buffers[i]) {
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buffers[i] = static_pointer_cast<const collection_type_impl>(_type->type(i))->reserialize(
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options.get_cql_serialization_format(),
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cql_serialization_format::internal(),
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bytes_view(*buffers[i]));
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}
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}
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}
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return buffers;
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}
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public:
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virtual shared_ptr<terminal> bind(const query_options& options) override {
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return ::make_shared<value>(bind_internal(options));
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}
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virtual cql3::raw_value_view bind_and_get(const query_options& options) override {
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// We don't "need" that override but it saves us the allocation of a Value object if used
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return cql3::raw_value_view::make_temporary(cql3::raw_value::make_value(_type->build_value(bind_internal(options))));
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}
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};
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/**
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* A terminal value for a list of IN values that are tuples. For example: "SELECT ... WHERE (a, b, c) IN ?"
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* This is similar to Lists.Value, but allows us to keep components of the tuples in the list separate.
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*/
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class in_value : public terminal {
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private:
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std::vector<std::vector<bytes_opt>> _elements;
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public:
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in_value(std::vector<std::vector<bytes_opt>> items) : _elements(std::move(items)) { }
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in_value(std::vector<std::vector<bytes_view_opt>> items) {
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_elements.reserve(items.size());
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for (auto&& tuple : items) {
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std::vector<bytes_opt> elems;
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elems.reserve(tuple.size());
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for (auto&& e : tuple) {
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elems.emplace_back(e ? bytes_opt(bytes(e->begin(), e->end())) : bytes_opt());
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}
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_elements.emplace_back(std::move(elems));
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}
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}
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static in_value from_serialized(const fragmented_temporary_buffer::view& value_view, const list_type_impl& type, const query_options& options);
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virtual cql3::raw_value get(const query_options& options) override {
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throw exceptions::unsupported_operation_exception();
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}
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std::vector<std::vector<bytes_opt>> get_split_values() const {
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return _elements;
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}
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virtual sstring to_string() const override {
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std::vector<sstring> tuples(_elements.size());
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std::transform(_elements.begin(), _elements.end(), tuples.begin(), &tuples::tuple_to_string<bytes_opt>);
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return tuple_to_string(tuples);
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}
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};
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/**
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* A raw placeholder for a tuple of values for different multiple columns, each of which may have a different type.
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* For example, "SELECT ... WHERE (col1, col2) > ?".
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*/
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class raw : public abstract_marker::raw, public term::multi_column_raw {
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public:
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using abstract_marker::raw::raw;
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virtual ::shared_ptr<term> prepare(database& db, const sstring& keyspace, const std::vector<lw_shared_ptr<column_specification>>& receivers) const override {
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return make_shared<tuples::marker>(_bind_index, make_receiver(receivers));
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}
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virtual ::shared_ptr<term> prepare(database& db, const sstring& keyspace, lw_shared_ptr<column_specification> receiver) const override {
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throw std::runtime_error("Tuples.Raw.prepare() requires a list of receivers");
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}
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virtual sstring assignment_testable_source_context() const override {
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return abstract_marker::raw::to_string();
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}
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virtual sstring to_string() const override {
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return abstract_marker::raw::to_string();
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}
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private:
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static lw_shared_ptr<column_specification> make_receiver(const std::vector<lw_shared_ptr<column_specification>>& receivers) {
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std::vector<data_type> types;
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types.reserve(receivers.size());
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sstring in_name = "(";
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for (auto&& receiver : receivers) {
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in_name += receiver->name->text();
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if (receiver != receivers.back()) {
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in_name += ",";
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}
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types.push_back(receiver->type);
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}
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in_name += ")";
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auto identifier = ::make_shared<column_identifier>(in_name, true);
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auto type = tuple_type_impl::get_instance(types);
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return make_lw_shared<column_specification>(receivers.front()->ks_name, receivers.front()->cf_name, identifier, type);
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}
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};
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/**
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* A raw marker for an IN list of tuples, like "SELECT ... WHERE (a, b, c) IN ?"
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*/
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class in_raw : public abstract_marker::raw, public term::multi_column_raw {
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public:
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using abstract_marker::raw::raw;
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virtual ::shared_ptr<term> prepare(database& db, const sstring& keyspace, const std::vector<lw_shared_ptr<column_specification>>& receivers) const override {
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return make_shared<tuples::in_marker>(_bind_index, make_in_receiver(receivers));
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}
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virtual ::shared_ptr<term> prepare(database& db, const sstring& keyspace, lw_shared_ptr<column_specification> receiver) const override {
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throw std::runtime_error("Tuples.INRaw.prepare() requires a list of receivers");
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}
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virtual sstring assignment_testable_source_context() const override {
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return to_string();
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}
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virtual sstring to_string() const override {
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return abstract_marker::raw::to_string();
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}
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private:
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static lw_shared_ptr<column_specification> make_in_receiver(const std::vector<lw_shared_ptr<column_specification>>& receivers);
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};
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/**
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* Represents a marker for a single tuple, like "SELECT ... WHERE (a, b, c) > ?"
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*/
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class marker : public abstract_marker {
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public:
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marker(int32_t bind_index, lw_shared_ptr<column_specification> receiver)
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: abstract_marker(bind_index, std::move(receiver))
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{ }
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virtual shared_ptr<terminal> bind(const query_options& options) override {
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const auto& value = options.get_value_at(_bind_index);
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if (value.is_null()) {
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return nullptr;
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} else if (value.is_unset_value()) {
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throw exceptions::invalid_request_exception(format("Invalid unset value for tuple {}", _receiver->name->text()));
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} else {
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auto& type = static_cast<const tuple_type_impl&>(*_receiver->type);
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try {
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with_linearized(*value, [&] (bytes_view v) {
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type.validate(v, options.get_cql_serialization_format());
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});
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} catch (marshal_exception& e) {
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throw exceptions::invalid_request_exception(
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format("Exception while binding column {:s}: {:s}", _receiver->name->to_cql_string(), e.what()));
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}
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return make_shared<tuples::value>(value::from_serialized(*value, type));
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}
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}
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};
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/**
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* Represents a marker for a set of IN values that are tuples, like "SELECT ... WHERE (a, b, c) IN ?"
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*/
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class in_marker : public abstract_marker {
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public:
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in_marker(int32_t bind_index, lw_shared_ptr<column_specification> receiver);
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virtual shared_ptr<terminal> bind(const query_options& options) override;
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};
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template <typename T>
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static sstring tuple_to_string(const std::vector<T>& items) {
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return format("({})", join(", ", items));
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}
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};
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}
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