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.
114 lines
4.3 KiB
C++
114 lines
4.3 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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#include "schema_mutations.hh"
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#include "canonical_mutation.hh"
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#include "db/schema_tables.hh"
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#include "md5_hasher.hh"
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schema_mutations::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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: _columnfamilies(columnfamilies.to_mutation(is_view ? db::schema_tables::views() : db::schema_tables::tables()))
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, _columns(columns.to_mutation(db::schema_tables::columns()))
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, _indices(indices ? stdx::optional<mutation>{indices.value().to_mutation(db::schema_tables::indexes())} : stdx::nullopt)
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, _dropped_columns(dropped_columns ? stdx::optional<mutation>{dropped_columns.value().to_mutation(db::schema_tables::dropped_columns())} : stdx::nullopt)
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, _scylla_tables(scylla_tables ? stdx::optional<mutation>{scylla_tables.value().to_mutation(db::schema_tables::scylla_tables())} : stdx::nullopt)
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{}
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void schema_mutations::copy_to(std::vector<mutation>& dst) const {
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dst.push_back(_columnfamilies);
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dst.push_back(_columns);
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if (_indices) {
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dst.push_back(_indices.value());
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}
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if (_dropped_columns) {
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dst.push_back(_dropped_columns.value());
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}
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if (_scylla_tables) {
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dst.push_back(_scylla_tables.value());
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}
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}
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table_schema_version schema_mutations::digest() const {
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if (_scylla_tables) {
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auto rs = query::result_set(*_scylla_tables);
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if (!rs.empty()) {
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auto&& row = rs.row(0);
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if (row.has("version")) {
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auto val = row.get<utils::UUID>("version");
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if (val) {
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return *val;
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}
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}
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}
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}
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md5_hasher h;
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db::schema_tables::feed_hash_for_schema_digest(h, _columnfamilies);
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db::schema_tables::feed_hash_for_schema_digest(h, _columns);
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if (_indices && !_indices.value().partition().empty()) {
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db::schema_tables::feed_hash_for_schema_digest(h, _indices.value());
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}
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if (_dropped_columns && !_dropped_columns.value().partition().empty()) {
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db::schema_tables::feed_hash_for_schema_digest(h, _dropped_columns.value());
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}
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if (_scylla_tables) {
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db::schema_tables::feed_hash_for_schema_digest(h, _scylla_tables.value());
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}
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return utils::UUID_gen::get_name_UUID(h.finalize());
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}
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static stdx::optional<mutation> compact(const stdx::optional<mutation>& m) {
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if (!m) {
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return m;
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}
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return db::schema_tables::compact_for_schema_digest(*m);
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}
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static stdx::optional<mutation> compact(const mutation& m) {
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return db::schema_tables::compact_for_schema_digest(m);
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}
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bool schema_mutations::operator==(const schema_mutations& other) const {
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return compact(_columnfamilies) == compact(other._columnfamilies)
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&& compact(_columns) == compact(other._columns)
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&& compact(_indices) == compact(other._indices)
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&& compact(_dropped_columns) == compact(other._dropped_columns)
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&& compact(_scylla_tables) == compact(other._scylla_tables)
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;
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}
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bool schema_mutations::operator!=(const schema_mutations& other) const {
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return !(*this == other);
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}
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bool schema_mutations::live() const {
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return _columnfamilies.live_row_count() > 0 || _columns.live_row_count() > 0;
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}
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bool schema_mutations::is_view() const {
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return _columnfamilies.schema() == db::schema_tables::views();
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}
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