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c0d3e6c773
The classes 'collection_mutation' and 'collection_mutation_view' were moved to a separate header, collection_mutation.hh. Implementations of functions that operate on these classes, including some methods of collection_type_impl, were moved to a separate compilation unit, collection_mutation.cc. This makes it easier to modify these structures in future commits in order to generalize them for non-frozen User Defined Types. Some additional documentation has been written for collection_mutation.
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 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 "atomic_cell.hh"
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#include "collection_mutation.hh"
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#include "tombstone.hh"
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#include "range_tombstone.hh"
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#include "keys.hh"
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class row_marker;
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class row_tombstone;
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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 = 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 = 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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