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04fe18de0f
The cdc_topology_description table will be used internally by nodes to send new CDC stream generations to other nodes. The cdc_description table is a user-facing table, used to inform users about new sets of CDC streams. Regenerate sstables and digests for schema_change_test. We don't need to protect this change by a schema feature: when a node creates these tables, it announces them to all other nodes. If schema agreement happens before this migration, all nodes will use a digest calculated without these tables. If it happens after, then all nodes will eventually know about these tables and use a digest calculated with these tables.
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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* Copyright (C) 2018 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 "bytes.hh"
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#include "cql3/query_processor.hh"
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#include "schema.hh"
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#include "service/migration_manager.hh"
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#include "utils/UUID.hh"
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#include <seastar/core/future.hh>
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#include <seastar/core/sstring.hh>
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#include <unordered_map>
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namespace cdc {
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class stream_id;
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class topology_description;
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} // namespace cdc
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namespace db {
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class system_distributed_keyspace {
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public:
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static constexpr auto NAME = "system_distributed";
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static constexpr auto VIEW_BUILD_STATUS = "view_build_status";
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/* Nodes use this table to communicate new CDC stream generations to other nodes. */
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static constexpr auto CDC_TOPOLOGY_DESCRIPTION = "cdc_topology_description";
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/* This table is used by CDC clients to learn about avaliable CDC streams. */
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static constexpr auto CDC_DESC = "cdc_description";
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/* Information required to modify/query some system_distributed tables, passed from the caller. */
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struct context {
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/* How many different token owners (endpoints) are there in the token ring? */
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size_t num_token_owners;
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};
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private:
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cql3::query_processor& _qp;
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service::migration_manager& _mm;
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public:
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system_distributed_keyspace(cql3::query_processor&, service::migration_manager&);
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future<> start();
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future<> stop();
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future<std::unordered_map<utils::UUID, sstring>> view_status(sstring ks_name, sstring view_name) const;
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future<> start_view_build(sstring ks_name, sstring view_name) const;
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future<> finish_view_build(sstring ks_name, sstring view_name) const;
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future<> remove_view(sstring ks_name, sstring view_name) const;
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future<> insert_cdc_topology_description(db_clock::time_point streams_ts, const cdc::topology_description&, context);
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future<std::optional<cdc::topology_description>> read_cdc_topology_description(db_clock::time_point streams_ts, context);
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future<> expire_cdc_topology_description(db_clock::time_point streams_ts, db_clock::time_point expiration_time, context);
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future<> create_cdc_desc(db_clock::time_point streams_ts, const std::vector<cdc::stream_id>&, context);
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future<> expire_cdc_desc(db_clock::time_point streams_ts, db_clock::time_point expiration_time, context);
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future<bool> cdc_desc_exists(db_clock::time_point streams_ts, context);
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};
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}
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