f3eade2f62
Drop the AGPL license in favor of a source-available license. See the blog post [1] for details. [1] https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/*
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* Copyright (C) 2016-present ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
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*/
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#pragma once
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#include "readers/mutation_reader_fwd.hh"
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#include "readers/mutation_reader.hh"
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#include "db/system_keyspace.hh"
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#include "tracing/trace_state.hh"
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namespace replica {
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class database;
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}
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namespace db {
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namespace size_estimates {
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struct token_range {
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bytes start;
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bytes end;
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};
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class size_estimates_mutation_reader final : public mutation_reader::impl {
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replica::database& _db;
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db::system_keyspace& _sys_ks;
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const dht::partition_range* _prange;
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const query::partition_slice& _slice;
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using ks_range = std::vector<sstring>;
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std::optional<ks_range> _keyspaces;
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ks_range::const_iterator _current_partition;
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streamed_mutation::forwarding _fwd;
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mutation_reader_opt _partition_reader;
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public:
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size_estimates_mutation_reader(replica::database& db, db::system_keyspace& sys_ks, schema_ptr, reader_permit, const dht::partition_range&, const query::partition_slice&, streamed_mutation::forwarding);
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virtual future<> fill_buffer() override;
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virtual future<> next_partition() override;
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virtual future<> fast_forward_to(const dht::partition_range&) override;
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virtual future<> fast_forward_to(position_range) override;
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virtual future<> close() noexcept override;
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private:
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future<> get_next_partition();
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future<> close_partition_reader() noexcept;
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std::vector<db::system_keyspace::range_estimates>
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estimates_for_current_keyspace(std::vector<token_range> local_ranges) const;
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};
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struct virtual_reader {
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replica::database& db;
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db::system_keyspace& sys_ks;
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mutation_reader operator()(schema_ptr schema,
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reader_permit permit,
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const dht::partition_range& range,
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const query::partition_slice& slice,
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tracing::trace_state_ptr trace_state,
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streamed_mutation::forwarding fwd,
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mutation_reader::forwarding fwd_mr) {
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return make_mutation_reader<size_estimates_mutation_reader>(db, sys_ks, std::move(schema), std::move(permit), range, slice, fwd);
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}
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virtual_reader(replica::database& db_, db::system_keyspace& sys_ks_) noexcept : db(db_), sys_ks(sys_ks_) {}
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};
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future<std::vector<token_range>> test_get_local_ranges(replica::database& db, db::system_keyspace& sys_ks);
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} // namespace size_estimates
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} // namespace db
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