be0351b49c
Currently, the code is using bytes_opt and bytes_view_opt to represent CQL values, which can hold a value or null. In preparation for supporting a third state, unset value introduced in CQL v4, introduce new raw_value and raw_value_view types and use them instead. The new types are based on boost::variant<> and are capable of holding null, unset values, and blobs that represent a value.
92 lines
3.5 KiB
C++
92 lines
3.5 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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*
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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 "column_specification.hh"
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#include "term.hh"
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#include "column_identifier.hh"
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#include "constants.hh"
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#include "to_string.hh"
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namespace cql3 {
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/**
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* Static helper methods and classes for user types.
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*/
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class user_types {
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user_types() = delete;
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public:
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static shared_ptr<column_specification> field_spec_of(shared_ptr<column_specification> column, size_t field);
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class literal : public term::raw {
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public:
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using elements_map_type = std::unordered_map<column_identifier, shared_ptr<term::raw>>;
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elements_map_type _entries;
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literal(elements_map_type entries);
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virtual shared_ptr<term> prepare(database& db, const sstring& keyspace, shared_ptr<column_specification> receiver) override;
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private:
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void validate_assignable_to(database& db, const sstring& keyspace, shared_ptr<column_specification> receiver);
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public:
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virtual assignment_testable::test_result test_assignment(database& db, const sstring& keyspace, shared_ptr<column_specification> receiver) override;
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virtual sstring assignment_testable_source_context() const override;
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virtual sstring to_string() const override;
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};
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// Same purpose than Lists.DelayedValue, except we do handle bind marker in that case
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class delayed_value : public non_terminal {
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user_type _type;
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std::vector<shared_ptr<term>> _values;
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public:
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delayed_value(user_type type, std::vector<shared_ptr<term>> values);
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virtual bool uses_function(const sstring& ks_name, const sstring& function_name) const override;
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virtual bool contains_bind_marker() const override;
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virtual void collect_marker_specification(shared_ptr<variable_specifications> bound_names);
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private:
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std::vector<cql3::raw_value> bind_internal(const query_options& options);
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public:
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virtual shared_ptr<terminal> bind(const query_options& options) override;
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virtual cql3::raw_value_view bind_and_get(const query_options& options) override;
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};
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};
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}
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