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https://github.com/scylladb/scylladb.git
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112086767c
In case of secondary indexes, if an index does not contain any column from the base which makes up for the primary key, then it is assumed that during update, a change to some cells from the base table cannot cause that we're dealing with a different row in the view. This however doesn't take into account the possibility of computed columns which in fact do depend on some non-primary-key columns. Introduce additional property of an index, has_computed_column_depending_on_base_non_primary_key.
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright (C) 2017-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 "dht/i_partitioner.hh"
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#include "query-request.hh"
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#include "schema_fwd.hh"
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#include "db/view/view.hh"
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namespace cql3::statements {
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class select_statement;
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}
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class view_info final {
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const schema& _schema;
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raw_view_info _raw;
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// The following fields are used to select base table rows.
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mutable shared_ptr<cql3::statements::select_statement> _select_statement;
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mutable std::optional<query::partition_slice> _partition_slice;
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db::view::base_info_ptr _base_info;
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mutable bool _has_computed_column_depending_on_base_non_primary_key;
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public:
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view_info(const schema& schema, const raw_view_info& raw_view_info);
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const raw_view_info& raw() const {
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return _raw;
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}
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const table_id& base_id() const {
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return _raw.base_id();
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}
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const sstring& base_name() const {
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return _raw.base_name();
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}
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bool include_all_columns() const {
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return _raw.include_all_columns();
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}
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const sstring& where_clause() const {
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return _raw.where_clause();
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}
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cql3::statements::select_statement& select_statement() const;
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const query::partition_slice& partition_slice() const;
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const column_definition* view_column(const schema& base, column_id base_id) const;
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const column_definition* view_column(const column_definition& base_def) const;
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bool has_base_non_pk_columns_in_view_pk() const;
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bool has_computed_column_depending_on_base_non_primary_key() const {
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return _has_computed_column_depending_on_base_non_primary_key;
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}
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/// Returns a pointer to the base_dependent_view_info which matches the current
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/// schema of the base table.
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///
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/// base_dependent_view_info lives separately from the view schema.
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/// It can change without the view schema changing its value.
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/// This pointer is updated on base table schema changes as long as this view_info
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/// corresponds to the current schema of the view. After that the pointer stops tracking
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/// the base table schema.
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///
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/// The snapshot of both the view schema and base_dependent_view_info is represented
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/// by view_and_base. See with_base_info_snapshot().
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const db::view::base_info_ptr& base_info() const { return _base_info; }
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void set_base_info(db::view::base_info_ptr);
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db::view::base_info_ptr make_base_dependent_view_info(const schema& base_schema) const;
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friend bool operator==(const view_info& x, const view_info& y) {
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return x._raw == y._raw;
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}
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friend std::ostream& operator<<(std::ostream& os, const view_info& view) {
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return os << view._raw;
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}
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};
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