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69a385fd9d
Schema related files are moved there. This excludes schema files that also interact with mutations, because the mutation module depends on the schema. Those files will have to go into a separate module. Closes #12858
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
/*
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* Copyright (C) 2015-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 <seastar/util/bool_class.hh>
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#include "schema/schema_fwd.hh"
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class atomic_cell_view;
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class collection_mutation_view;
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class row_marker;
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class row_tombstone;
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class range_tombstone;
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class tombstone;
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class position_in_partition_view;
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// When used on an entry, marks the range between this entry and the previous
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// one as continuous or discontinuous, excluding the keys of both entries.
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// This information doesn't apply to continuity of the entries themselves,
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// that is specified by is_dummy flag.
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// See class doc of mutation_partition.
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using is_continuous = seastar::bool_class<class continuous_tag>;
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// Dummy entry is an entry which is incomplete.
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// Typically used for marking bounds of continuity range.
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// See class doc of mutation_partition.
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class dummy_tag {};
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using is_dummy = seastar::bool_class<dummy_tag>;
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// Guarantees:
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//
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// - any tombstones which affect cell's liveness are visited before that cell
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//
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// - rows are visited in ascending order with respect to their keys
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//
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// - row header (accept_row) is visited before that row's cells
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//
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// - row tombstones are visited in ascending order with respect to their key prefixes
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//
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// - cells in given row are visited in ascending order with respect to their column IDs
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//
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// - static row is visited before any clustered row
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//
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// - for each column in a row only one variant of accept_(static|row)_cell() is called, appropriate
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// for column's kind (atomic or collection).
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//
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class mutation_partition_visitor {
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public:
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virtual void accept_partition_tombstone(tombstone) = 0;
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virtual void accept_static_cell(column_id, atomic_cell_view) = 0;
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virtual void accept_static_cell(column_id, collection_mutation_view) = 0;
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virtual void accept_row_tombstone(const range_tombstone&) = 0;
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virtual void accept_row(position_in_partition_view key, const row_tombstone& deleted_at, const row_marker& rm,
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is_dummy = is_dummy::no, is_continuous = is_continuous::yes) = 0;
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virtual void accept_row_cell(column_id id, atomic_cell_view) = 0;
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virtual void accept_row_cell(column_id id, collection_mutation_view) = 0;
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};
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