57e9e9c369
Before we add a new, is_shadowable, parameter to it. And define global `can_always_purge` and `can_never_purge` functions, a-la `always_gc` and `never_gc`. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
/*
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* Copyright (C) 2022-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include "gc_clock.hh"
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#include "readers/mutation_reader_fwd.hh"
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#include "compaction/compaction_garbage_collector.hh"
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namespace dht {
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class decorated_key;
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}
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class tombstone_gc_state;
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/// Creates a compacting reader.
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///
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/// The compaction is done with a \ref mutation_compactor, using compaction-type
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/// compaction (`compact_for_sstables::yes`).
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///
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/// \param source the reader whose output to compact.
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///
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/// Params \c compaction_time and \c get_max_purgeable are forwarded to the
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/// \ref mutation_compactor instance.
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///
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/// Inter-partition forwarding: `next_partition()` and
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/// `fast_forward_to(const dht::partition_range&)` is supported if the source
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/// reader supports it
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/// Intra-partition forwarding: `fast_forward_to(position_range)` is supported
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/// if the source reader supports it
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mutation_reader make_compacting_reader(mutation_reader source, gc_clock::time_point compaction_time,
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max_purgeable_fn get_max_purgeable,
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const tombstone_gc_state& gc_state,
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streamed_mutation::forwarding fwd = streamed_mutation::forwarding::no);
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