ced4b6e4ff
This patch adds an utility function to rename an identifier occurring in a cql3 relation. This function will be used when renaming an identifier in a view's where clause. Signed-off-by: Duarte Nunes <duarte@scylladb.com>
130 lines
4.6 KiB
C++
130 lines
4.6 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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* Copyright (C) 2015 ScyllaDB
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*
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* Modified by 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 <vector>
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#include "core/shared_ptr.hh"
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#include "to_string.hh"
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#include "relation.hh"
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#include "column_identifier.hh"
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#include "term.hh"
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#include "restrictions/restriction.hh"
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namespace cql3 {
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/**
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* A relation using the token function.
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* Examples:
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* <ul>
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* <li>SELECT ... WHERE token(a) > token(1)</li>
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* <li>SELECT ... WHERE token(a, b) > token(1, 3)</li>
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* </ul>
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*/
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class token_relation : public relation {
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private:
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std::vector<::shared_ptr<column_identifier::raw>> _entities;
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::shared_ptr<term::raw> _value;
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/**
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* Returns the definition of the columns to which apply the token restriction.
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*
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* @param cfm the column family metadata
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* @return the definition of the columns to which apply the token restriction.
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* @throws InvalidRequestException if the entity cannot be resolved
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*/
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std::vector<const column_definition*> get_column_definitions(schema_ptr s);
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/**
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* Returns the receivers for this relation.
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*
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* @param cfm the Column Family meta data
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* @param columnDefs the column definitions
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* @return the receivers for the specified relation.
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* @throws InvalidRequestException if the relation is invalid
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*/
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std::vector<::shared_ptr<column_specification>> to_receivers(schema_ptr schema, const std::vector<const column_definition*>& column_defs);
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public:
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token_relation(std::vector<::shared_ptr<column_identifier::raw>> entities,
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const operator_type& type, ::shared_ptr<term::raw> value)
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: relation(type), _entities(std::move(entities)), _value(
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std::move(value)) {
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}
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bool on_token() const override {
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return true;
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}
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::shared_ptr<restrictions::restriction> new_EQ_restriction(database& db,
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schema_ptr schema,
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::shared_ptr<variable_specifications> bound_names) override;
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::shared_ptr<restrictions::restriction> new_IN_restriction(database& db,
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schema_ptr schema,
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::shared_ptr<variable_specifications> bound_names) override;
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::shared_ptr<restrictions::restriction> new_slice_restriction(database& db,
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schema_ptr schema,
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::shared_ptr<variable_specifications> bound_names,
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statements::bound bound,
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bool inclusive) override;
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::shared_ptr<restrictions::restriction> new_contains_restriction(
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database& db, schema_ptr schema,
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::shared_ptr<variable_specifications> bound_names, bool isKey)
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override;
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::shared_ptr<relation> maybe_rename_identifier(const column_identifier::raw& from, column_identifier::raw to) override;
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sstring to_string() const override;
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protected:
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::shared_ptr<term> to_term(const std::vector<::shared_ptr<column_specification>>& receivers,
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::shared_ptr<term::raw> raw,
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database& db,
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const sstring& keyspace,
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::shared_ptr<variable_specifications> bound_names) override;
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};
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}
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