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6728454591
Rather than dynamic_cast<>ing the statement to see whether it is a select statement, add a virtual function to cql_statement to get the result metadata. This is faster and easier to follow. Message-Id: <1464334638-7971-2-git-send-email-avi@scylladb.com>
106 lines
3.6 KiB
C++
106 lines
3.6 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) 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 "transport/messages_fwd.hh"
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#include "transport/event.hh"
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#include "cql3/statements/raw/cf_statement.hh"
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#include "cql3/cql_statement.hh"
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#include "core/shared_ptr.hh"
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#include <experimental/optional>
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namespace cql3 {
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namespace statements {
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namespace messages = transport::messages;
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/**
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* Abstract class for statements that alter the schema.
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*/
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class schema_altering_statement : public raw::cf_statement, public cql_statement_no_metadata, public ::enable_shared_from_this<schema_altering_statement> {
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private:
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const bool _is_column_family_level;
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future<::shared_ptr<messages::result_message>>
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execute0(distributed<service::storage_proxy>& proxy, service::query_state& state, const query_options& options, bool);
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protected:
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schema_altering_statement();
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schema_altering_statement(::shared_ptr<cf_name> name);
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virtual bool uses_function(const sstring& ks_name, const sstring& function_name) const override;
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virtual bool depends_on_keyspace(const sstring& ks_name) const override;
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virtual bool depends_on_column_family(const sstring& cf_name) const override;
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virtual uint32_t get_bound_terms() override;
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virtual void prepare_keyspace(const service::client_state& state) override;
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virtual ::shared_ptr<prepared> prepare(database& db) override;
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virtual shared_ptr<transport::event::schema_change> change_event() = 0;
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/**
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* Announces the migration to other nodes in the cluster.
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* @return true if the execution of this statement resulted in a schema change, false otherwise (when IF NOT EXISTS
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* is used, for example)
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* @throws RequestValidationException
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*/
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virtual future<bool> announce_migration(distributed<service::storage_proxy>& proxy, bool is_local_only) = 0;
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virtual future<::shared_ptr<messages::result_message>>
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execute(distributed<service::storage_proxy>& proxy, service::query_state& state, const query_options& options) override;
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virtual future<::shared_ptr<messages::result_message>>
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execute_internal(distributed<service::storage_proxy>&, service::query_state& state, const query_options& options) override;
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};
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}
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}
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