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https://github.com/scylladb/scylladb.git
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78ff728795
Digest only looks like live values, ignoring deletion information. Equality should be consistent with that, so that schemas considered equal do not trigger the alter path unnecessarily.
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
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* Copyright 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 <vector>
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#include "mutation.hh"
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#include "schema.hh"
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#include "canonical_mutation.hh"
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// Commutative representation of table schema
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// Equality ignores tombstones.
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class schema_mutations {
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mutation _columnfamilies;
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mutation _columns;
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stdx::optional<mutation> _indices;
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stdx::optional<mutation> _dropped_columns;
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stdx::optional<mutation> _scylla_tables;
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public:
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schema_mutations(mutation columnfamilies, mutation columns, stdx::optional<mutation> indices, stdx::optional<mutation> dropped_columns,
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stdx::optional<mutation> scylla_tables)
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: _columnfamilies(std::move(columnfamilies))
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, _columns(std::move(columns))
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, _indices(std::move(indices))
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, _dropped_columns(std::move(dropped_columns))
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, _scylla_tables(std::move(scylla_tables))
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{ }
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schema_mutations(canonical_mutation columnfamilies,
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canonical_mutation columns,
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bool is_view,
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stdx::optional<canonical_mutation> indices,
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stdx::optional<canonical_mutation> dropped_columns,
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stdx::optional<canonical_mutation> scylla_tables);
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schema_mutations(schema_mutations&&) = default;
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schema_mutations& operator=(schema_mutations&&) = default;
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schema_mutations(const schema_mutations&) = default;
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schema_mutations& operator=(const schema_mutations&) = default;
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void copy_to(std::vector<mutation>& dst) const;
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const mutation& columnfamilies_mutation() const {
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return _columnfamilies;
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}
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const mutation& columns_mutation() const {
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return _columns;
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}
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const stdx::optional<mutation>& scylla_tables() const {
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return _scylla_tables;
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}
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const stdx::optional<mutation>& indices_mutation() const {
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return _indices;
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}
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const stdx::optional<mutation>& dropped_columns_mutation() const {
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return _dropped_columns;
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}
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canonical_mutation columnfamilies_canonical_mutation() const {
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return canonical_mutation(_columnfamilies);
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}
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canonical_mutation columns_canonical_mutation() const {
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return canonical_mutation(_columns);
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}
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stdx::optional<canonical_mutation> indices_canonical_mutation() const {
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if (_indices) {
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return canonical_mutation(_indices.value());
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}
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return {};
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}
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stdx::optional<canonical_mutation> dropped_columns_canonical_mutation() const {
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if (_dropped_columns) {
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return canonical_mutation(_dropped_columns.value());
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}
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return {};
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}
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stdx::optional<canonical_mutation> scylla_tables_canonical_mutation() const {
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if (_scylla_tables) {
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return canonical_mutation(_scylla_tables.value());
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}
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return {};
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}
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bool is_view() const;
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table_schema_version digest() const;
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bool operator==(const schema_mutations&) const;
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bool operator!=(const schema_mutations&) const;
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// Returns true iff any mutations contain any live cells
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bool live() const;
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};
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