26c115f379
Currently the statement's execute() method accepts storage proxy as the first argument. This is enough for all of them but schema altering ones, because the latter need to call migration manager's announce. To provide the migration manager to those who need it it's needed to have some higher-level service that the proxy. The query processor seems to be good candidate for it. Said that -- all the .execute()s now accept the querty processor instead of the proxy and get the proxy itself from the query processor. Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
143 lines
4.3 KiB
C++
143 lines
4.3 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) 2014 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 "service/client_state.hh"
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#include "service/query_state.hh"
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#include "service/storage_proxy.hh"
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#include "cql3/query_options.hh"
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#include "timeout_config.hh"
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namespace cql_transport {
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namespace messages {
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class result_message;
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}
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}
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namespace cql3 {
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class query_processor;
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class metadata;
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shared_ptr<const metadata> make_empty_metadata();
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class cql_statement {
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timeout_config_selector _timeout_config_selector;
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public:
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// CQL statement text
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sstring raw_cql_statement;
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explicit cql_statement(timeout_config_selector timeout_selector) : _timeout_config_selector(timeout_selector) {}
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virtual ~cql_statement()
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{ }
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timeout_config_selector get_timeout_config_selector() const { return _timeout_config_selector; }
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virtual uint32_t get_bound_terms() const = 0;
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/**
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* Perform any access verification necessary for the statement.
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*
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* @param state the current client state
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*/
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virtual future<> check_access(service::storage_proxy& proxy, const service::client_state& state) const = 0;
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/**
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* Perform additional validation required by the statment.
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* To be overriden by subclasses if needed.
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*
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* @param state the current client state
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*/
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virtual void validate(service::storage_proxy& proxy, const service::client_state& state) const = 0;
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/**
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* Execute the statement and return the resulting result or null if there is no result.
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*
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* @param state the current query state
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* @param options options for this query (consistency, variables, pageSize, ...)
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*/
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virtual future<::shared_ptr<cql_transport::messages::result_message>>
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execute(query_processor& qp, service::query_state& state, const query_options& options) const = 0;
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virtual bool depends_on_keyspace(const sstring& ks_name) const = 0;
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virtual bool depends_on_column_family(const sstring& cf_name) const = 0;
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virtual shared_ptr<const metadata> get_result_metadata() const = 0;
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virtual bool is_conditional() const {
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return false;
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}
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};
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class cql_statement_no_metadata : public cql_statement {
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public:
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using cql_statement::cql_statement;
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virtual shared_ptr<const metadata> get_result_metadata() const override {
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return make_empty_metadata();
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}
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};
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// Conditional modification statements and batches
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// return a result set and have metadata, while same
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// statements without conditions do not.
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class cql_statement_opt_metadata : public cql_statement {
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protected:
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// Result set metadata, may be empty for simple updates and batches
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shared_ptr<metadata> _metadata;
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public:
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using cql_statement::cql_statement;
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virtual shared_ptr<const metadata> get_result_metadata() const override {
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if (_metadata) {
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return _metadata;
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}
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return make_empty_metadata();
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}
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};
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}
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