582d397c41
Counter write path involves read-modify-write. That read is guaranteed to query only a single partition, does not care about dead cells and expects to receive an unserialized mutation as a result. Standard mutation queries can are able to produce results fit for counter updates, but the logic involved is much more general (i.e. slower), hence the addition of new, counter-specific kind of query.
744 lines
29 KiB
C++
744 lines
29 KiB
C++
/*
|
|
* Copyright (C) 2014 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <iosfwd>
|
|
#include <map>
|
|
#include <boost/intrusive/set.hpp>
|
|
#include <boost/range/iterator_range.hpp>
|
|
#include <boost/range/adaptor/indexed.hpp>
|
|
#include <boost/range/adaptor/filtered.hpp>
|
|
|
|
#include <seastar/core/bitset-iter.hh>
|
|
|
|
#include "schema.hh"
|
|
#include "tombstone.hh"
|
|
#include "keys.hh"
|
|
#include "atomic_cell_or_collection.hh"
|
|
#include "query-result.hh"
|
|
#include "mutation_partition_view.hh"
|
|
#include "mutation_partition_visitor.hh"
|
|
#include "utils/managed_vector.hh"
|
|
#include "hashing_partition_visitor.hh"
|
|
#include "range_tombstone_list.hh"
|
|
#include "clustering_key_filter.hh"
|
|
#include "intrusive_set_external_comparator.hh"
|
|
|
|
//
|
|
// Container for cells of a row. Cells are identified by column_id.
|
|
//
|
|
// All cells must belong to a single column_kind. The kind is not stored
|
|
// for space-efficiency reasons. Whenever a method accepts a column_kind,
|
|
// the caller must always supply the same column_kind.
|
|
//
|
|
// Can be used as a range of row::cell_entry.
|
|
//
|
|
class row {
|
|
class cell_entry {
|
|
boost::intrusive::set_member_hook<> _link;
|
|
column_id _id;
|
|
atomic_cell_or_collection _cell;
|
|
friend class row;
|
|
public:
|
|
cell_entry(column_id id, atomic_cell_or_collection cell)
|
|
: _id(id)
|
|
, _cell(std::move(cell))
|
|
{ }
|
|
cell_entry(column_id id)
|
|
: _id(id)
|
|
{ }
|
|
cell_entry(cell_entry&&) noexcept;
|
|
cell_entry(const cell_entry&);
|
|
|
|
column_id id() const { return _id; }
|
|
const atomic_cell_or_collection& cell() const { return _cell; }
|
|
atomic_cell_or_collection& cell() { return _cell; }
|
|
|
|
struct compare {
|
|
bool operator()(const cell_entry& e1, const cell_entry& e2) const {
|
|
return e1._id < e2._id;
|
|
}
|
|
bool operator()(column_id id1, const cell_entry& e2) const {
|
|
return id1 < e2._id;
|
|
}
|
|
bool operator()(const cell_entry& e1, column_id id2) const {
|
|
return e1._id < id2;
|
|
}
|
|
};
|
|
};
|
|
|
|
using size_type = std::make_unsigned_t<column_id>;
|
|
|
|
enum class storage_type {
|
|
vector,
|
|
set,
|
|
};
|
|
storage_type _type = storage_type::vector;
|
|
size_type _size = 0;
|
|
|
|
using map_type = boost::intrusive::set<cell_entry,
|
|
boost::intrusive::member_hook<cell_entry, boost::intrusive::set_member_hook<>, &cell_entry::_link>,
|
|
boost::intrusive::compare<cell_entry::compare>, boost::intrusive::constant_time_size<false>>;
|
|
public:
|
|
static constexpr size_t max_vector_size = 32;
|
|
static constexpr size_t internal_count = (sizeof(map_type) + sizeof(cell_entry)) / sizeof(atomic_cell_or_collection);
|
|
private:
|
|
using vector_type = managed_vector<atomic_cell_or_collection, internal_count, size_type>;
|
|
|
|
struct vector_storage {
|
|
std::bitset<max_vector_size> present;
|
|
vector_type v;
|
|
};
|
|
|
|
union storage {
|
|
storage() { }
|
|
~storage() { }
|
|
map_type set;
|
|
vector_storage vector;
|
|
} _storage;
|
|
public:
|
|
row();
|
|
~row();
|
|
row(const row&);
|
|
row(row&& other) noexcept;
|
|
row& operator=(row&& other) noexcept;
|
|
size_t size() const { return _size; }
|
|
bool empty() const { return _size == 0; }
|
|
|
|
void reserve(column_id);
|
|
|
|
const atomic_cell_or_collection& cell_at(column_id id) const;
|
|
|
|
// Returns a pointer to cell's value or nullptr if column is not set.
|
|
const atomic_cell_or_collection* find_cell(column_id id) const;
|
|
private:
|
|
template<typename Func>
|
|
void remove_if(Func&& func) {
|
|
if (_type == storage_type::vector) {
|
|
for (unsigned i = 0; i < _storage.vector.v.size(); i++) {
|
|
if (!_storage.vector.present.test(i)) {
|
|
continue;
|
|
}
|
|
auto& c = _storage.vector.v[i];
|
|
if (func(i, c)) {
|
|
c = atomic_cell_or_collection();
|
|
_storage.vector.present.reset(i);
|
|
_size--;
|
|
}
|
|
}
|
|
} else {
|
|
for (auto it = _storage.set.begin(); it != _storage.set.end();) {
|
|
if (func(it->id(), it->cell())) {
|
|
auto& entry = *it;
|
|
it = _storage.set.erase(it);
|
|
current_allocator().destroy(&entry);
|
|
_size--;
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
auto get_range_vector() const {
|
|
auto id_range = boost::irange<column_id>(0, _storage.vector.v.size());
|
|
return boost::combine(id_range, _storage.vector.v)
|
|
| boost::adaptors::filtered([this] (const boost::tuple<const column_id&, const atomic_cell_or_collection&>& t) {
|
|
return _storage.vector.present.test(t.get<0>());
|
|
}) | boost::adaptors::transformed([] (const boost::tuple<const column_id&, const atomic_cell_or_collection&>& t) {
|
|
return std::pair<column_id, const atomic_cell_or_collection&>(t.get<0>(), t.get<1>());
|
|
});
|
|
}
|
|
auto get_range_set() const {
|
|
auto range = boost::make_iterator_range(_storage.set.begin(), _storage.set.end());
|
|
return range | boost::adaptors::transformed([] (const cell_entry& c) {
|
|
return std::pair<column_id, const atomic_cell_or_collection&>(c.id(), c.cell());
|
|
});
|
|
}
|
|
template<typename Func>
|
|
auto with_both_ranges(const row& other, Func&& func) const;
|
|
|
|
void vector_to_set();
|
|
|
|
// Calls Func(column_id, atomic_cell_or_collection&) for each cell in this row.
|
|
//
|
|
// Func() is allowed to modify the cell. Emptying a cell makes it still
|
|
// visible to for_each().
|
|
//
|
|
// In case of exception, calls Rollback(column_id, atomic_cell_or_collection&) on
|
|
// all cells on which Func() was successfully invoked in reverse order.
|
|
//
|
|
template<typename Func, typename Rollback>
|
|
void for_each_cell(Func&&, Rollback&&);
|
|
public:
|
|
// Calls Func(column_id, atomic_cell_or_collection&) for each cell in this row.
|
|
// noexcept if Func doesn't throw.
|
|
template<typename Func>
|
|
void for_each_cell(Func&& func) {
|
|
if (_type == storage_type::vector) {
|
|
for (auto i : bitsets::for_each_set(_storage.vector.present)) {
|
|
func(i, _storage.vector.v[i]);
|
|
}
|
|
} else {
|
|
for (auto& cell : _storage.set) {
|
|
func(cell.id(), cell.cell());
|
|
}
|
|
}
|
|
}
|
|
|
|
template<typename Func>
|
|
void for_each_cell(Func&& func) const {
|
|
for_each_cell_until([func = std::forward<Func>(func)] (column_id id, const atomic_cell_or_collection& c) {
|
|
func(id, c);
|
|
return stop_iteration::no;
|
|
});
|
|
}
|
|
|
|
template<typename Func>
|
|
void for_each_cell_until(Func&& func) const {
|
|
if (_type == storage_type::vector) {
|
|
for (auto i : bitsets::for_each_set(_storage.vector.present)) {
|
|
auto& cell = _storage.vector.v[i];
|
|
if (func(i, cell) == stop_iteration::yes) {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
for (auto& cell : _storage.set) {
|
|
const auto& c = cell.cell();
|
|
if (func(cell.id(), c) == stop_iteration::yes) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Merges cell's value into the row.
|
|
void apply(const column_definition& column, const atomic_cell_or_collection& cell);
|
|
|
|
//
|
|
// Merges cell's value into the row.
|
|
//
|
|
// In case of exception the current object is left with a value equivalent to the original state.
|
|
//
|
|
// The external cell is left in a valid state, such that it will commute with
|
|
// current object to the same value should the exception had not occurred.
|
|
//
|
|
void apply(const column_definition& column, atomic_cell_or_collection&& cell);
|
|
|
|
// Equivalent to calling apply_reversibly() with a row containing only given cell.
|
|
// See reversibly_mergeable.hh
|
|
void apply_reversibly(const column_definition& column, atomic_cell_or_collection& cell);
|
|
// See reversibly_mergeable.hh
|
|
void revert(const column_definition& column, atomic_cell_or_collection& cell) noexcept;
|
|
|
|
// Adds cell to the row. The column must not be already set.
|
|
void append_cell(column_id id, atomic_cell_or_collection cell);
|
|
|
|
void apply(const schema&, column_kind, const row& src);
|
|
void apply(const schema&, column_kind, row&& src);
|
|
|
|
// See reversibly_mergeable.hh
|
|
void apply_reversibly(const schema&, column_kind, row& src);
|
|
// See reversibly_mergeable.hh
|
|
void revert(const schema&, column_kind, row& src) noexcept;
|
|
|
|
// Expires cells based on query_time. Expires tombstones based on gc_before
|
|
// and max_purgeable. Removes cells covered by tomb.
|
|
// Returns true iff there are any live cells left.
|
|
bool compact_and_expire(const schema& s, column_kind kind, tombstone tomb, gc_clock::time_point query_time,
|
|
can_gc_fn&, gc_clock::time_point gc_before);
|
|
|
|
row difference(const schema&, column_kind, const row& other) const;
|
|
|
|
// Assumes the other row has the same schema
|
|
// Consistent with feed_hash()
|
|
bool operator==(const row&) const;
|
|
|
|
bool equal(column_kind kind, const schema& this_schema, const row& other, const schema& other_schema) const;
|
|
|
|
size_t external_memory_usage() const;
|
|
|
|
friend std::ostream& operator<<(std::ostream& os, const row& r);
|
|
};
|
|
|
|
std::ostream& operator<<(std::ostream& os, const std::pair<column_id, const atomic_cell_or_collection&>& c);
|
|
|
|
class row_marker;
|
|
int compare_row_marker_for_merge(const row_marker& left, const row_marker& right) noexcept;
|
|
|
|
class row_marker {
|
|
static constexpr gc_clock::duration no_ttl { 0 };
|
|
static constexpr gc_clock::duration dead { -1 };
|
|
api::timestamp_type _timestamp = api::missing_timestamp;
|
|
gc_clock::duration _ttl = no_ttl;
|
|
gc_clock::time_point _expiry;
|
|
public:
|
|
row_marker() = default;
|
|
row_marker(api::timestamp_type created_at) : _timestamp(created_at) { }
|
|
row_marker(api::timestamp_type created_at, gc_clock::duration ttl, gc_clock::time_point expiry)
|
|
: _timestamp(created_at), _ttl(ttl), _expiry(expiry)
|
|
{ }
|
|
row_marker(tombstone deleted_at)
|
|
: _timestamp(deleted_at.timestamp), _ttl(dead), _expiry(deleted_at.deletion_time)
|
|
{ }
|
|
bool is_missing() const {
|
|
return _timestamp == api::missing_timestamp;
|
|
}
|
|
bool is_live() const {
|
|
return !is_missing() && _ttl != dead;
|
|
}
|
|
bool is_live(tombstone t, gc_clock::time_point now) const {
|
|
if (is_missing() || _ttl == dead) {
|
|
return false;
|
|
}
|
|
if (_ttl != no_ttl && _expiry < now) {
|
|
return false;
|
|
}
|
|
return _timestamp > t.timestamp;
|
|
}
|
|
// Can be called only when !is_missing().
|
|
bool is_dead(gc_clock::time_point now) const {
|
|
if (_ttl == dead) {
|
|
return true;
|
|
}
|
|
return _ttl != no_ttl && _expiry < now;
|
|
}
|
|
// Can be called only when is_live().
|
|
bool is_expiring() const {
|
|
return _ttl != no_ttl;
|
|
}
|
|
// Can be called only when is_expiring().
|
|
gc_clock::duration ttl() const {
|
|
return _ttl;
|
|
}
|
|
// Can be called only when is_expiring().
|
|
gc_clock::time_point expiry() const {
|
|
return _expiry;
|
|
}
|
|
// Can be called only when is_dead().
|
|
gc_clock::time_point deletion_time() const {
|
|
return _ttl == dead ? _expiry : _expiry - _ttl;
|
|
}
|
|
api::timestamp_type timestamp() const {
|
|
return _timestamp;
|
|
}
|
|
void apply(const row_marker& rm) {
|
|
if (compare_row_marker_for_merge(*this, rm) < 0) {
|
|
*this = rm;
|
|
}
|
|
}
|
|
// See reversibly_mergeable.hh
|
|
void apply_reversibly(row_marker& rm) noexcept;
|
|
// See reversibly_mergeable.hh
|
|
void revert(row_marker& rm) noexcept;
|
|
// Expires cells and tombstones. Removes items covered by higher level
|
|
// tombstones.
|
|
// Returns true if row marker is live.
|
|
bool compact_and_expire(tombstone tomb, gc_clock::time_point now,
|
|
can_gc_fn& can_gc, gc_clock::time_point gc_before) {
|
|
if (is_missing()) {
|
|
return false;
|
|
}
|
|
if (_timestamp <= tomb.timestamp) {
|
|
_timestamp = api::missing_timestamp;
|
|
return false;
|
|
}
|
|
if (_ttl > no_ttl && _expiry < now) {
|
|
_expiry -= _ttl;
|
|
_ttl = dead;
|
|
}
|
|
if (_ttl == dead && _expiry < gc_before && can_gc(tombstone(_timestamp, _expiry))) {
|
|
_timestamp = api::missing_timestamp;
|
|
}
|
|
return !is_missing() && _ttl != dead;
|
|
}
|
|
// Consistent with feed_hash()
|
|
bool operator==(const row_marker& other) const {
|
|
if (_timestamp != other._timestamp) {
|
|
return false;
|
|
}
|
|
if (is_missing()) {
|
|
return true;
|
|
}
|
|
if (_ttl != other._ttl) {
|
|
return false;
|
|
}
|
|
return _ttl == no_ttl || _expiry == other._expiry;
|
|
}
|
|
bool operator!=(const row_marker& other) const {
|
|
return !(*this == other);
|
|
}
|
|
// Consistent with operator==()
|
|
template<typename Hasher>
|
|
void feed_hash(Hasher& h) const {
|
|
::feed_hash(h, _timestamp);
|
|
if (!is_missing()) {
|
|
::feed_hash(h, _ttl);
|
|
if (_ttl != no_ttl) {
|
|
::feed_hash(h, _expiry);
|
|
}
|
|
}
|
|
}
|
|
friend std::ostream& operator<<(std::ostream& os, const row_marker& rm);
|
|
};
|
|
|
|
template<>
|
|
struct appending_hash<row_marker> {
|
|
template<typename Hasher>
|
|
void operator()(Hasher& h, const row_marker& m) const {
|
|
m.feed_hash(h);
|
|
}
|
|
};
|
|
|
|
class clustering_row;
|
|
|
|
class deletable_row final {
|
|
tombstone _deleted_at;
|
|
row_marker _marker;
|
|
row _cells;
|
|
public:
|
|
deletable_row() {}
|
|
explicit deletable_row(clustering_row&&);
|
|
|
|
void apply(tombstone deleted_at) {
|
|
_deleted_at.apply(deleted_at);
|
|
}
|
|
|
|
void apply(const row_marker& rm) {
|
|
_marker.apply(rm);
|
|
}
|
|
|
|
void remove_tombstone() {
|
|
_deleted_at = tombstone();
|
|
}
|
|
|
|
// See reversibly_mergeable.hh
|
|
void apply_reversibly(const schema& s, deletable_row& src);
|
|
// See reversibly_mergeable.hh
|
|
void revert(const schema& s, deletable_row& src);
|
|
public:
|
|
tombstone deleted_at() const { return _deleted_at; }
|
|
api::timestamp_type created_at() const { return _marker.timestamp(); }
|
|
row_marker& marker() { return _marker; }
|
|
const row_marker& marker() const { return _marker; }
|
|
const row& cells() const { return _cells; }
|
|
row& cells() { return _cells; }
|
|
friend std::ostream& operator<<(std::ostream& os, const deletable_row& dr);
|
|
bool equal(column_kind, const schema& s, const deletable_row& other, const schema& other_schema) const;
|
|
bool is_live(const schema& s, tombstone base_tombstone = tombstone(), gc_clock::time_point query_time = gc_clock::time_point::min()) const;
|
|
bool empty() const { return !_deleted_at && _marker.is_missing() && !_cells.size(); }
|
|
deletable_row difference(const schema&, column_kind, const deletable_row& other) const;
|
|
};
|
|
|
|
class rows_entry {
|
|
intrusive_set_external_comparator_member_hook _link;
|
|
clustering_key _key;
|
|
deletable_row _row;
|
|
friend class mutation_partition;
|
|
public:
|
|
explicit rows_entry(clustering_key&& key)
|
|
: _key(std::move(key))
|
|
{ }
|
|
explicit rows_entry(const clustering_key& key)
|
|
: _key(key)
|
|
{ }
|
|
rows_entry(const clustering_key& key, deletable_row&& row)
|
|
: _key(key), _row(std::move(row))
|
|
{ }
|
|
rows_entry(const clustering_key& key, const deletable_row& row)
|
|
: _key(key), _row(row)
|
|
{ }
|
|
rows_entry(rows_entry&& o) noexcept;
|
|
rows_entry(const rows_entry& e)
|
|
: _key(e._key)
|
|
, _row(e._row)
|
|
{ }
|
|
clustering_key& key() {
|
|
return _key;
|
|
}
|
|
const clustering_key& key() const {
|
|
return _key;
|
|
}
|
|
deletable_row& row() {
|
|
return _row;
|
|
}
|
|
const deletable_row& row() const {
|
|
return _row;
|
|
}
|
|
void apply(tombstone t) {
|
|
_row.apply(t);
|
|
}
|
|
// See reversibly_mergeable.hh
|
|
void apply_reversibly(const schema& s, rows_entry& e) {
|
|
_row.apply_reversibly(s, e._row);
|
|
}
|
|
// See reversibly_mergeable.hh
|
|
void revert(const schema& s, rows_entry& e) noexcept {
|
|
_row.revert(s, e._row);
|
|
}
|
|
bool empty() const {
|
|
return _row.empty();
|
|
}
|
|
struct compare {
|
|
clustering_key::less_compare _c;
|
|
compare(const schema& s) : _c(s) {}
|
|
bool operator()(const rows_entry& e1, const rows_entry& e2) const {
|
|
return _c(e1._key, e2._key);
|
|
}
|
|
bool operator()(const clustering_key& key, const rows_entry& e) const {
|
|
return _c(key, e._key);
|
|
}
|
|
bool operator()(const rows_entry& e, const clustering_key& key) const {
|
|
return _c(e._key, key);
|
|
}
|
|
bool operator()(const clustering_key_view& key, const rows_entry& e) const {
|
|
return _c(key, e._key);
|
|
}
|
|
bool operator()(const rows_entry& e, const clustering_key_view& key) const {
|
|
return _c(e._key, key);
|
|
}
|
|
};
|
|
template <typename Comparator>
|
|
struct delegating_compare {
|
|
Comparator _c;
|
|
delegating_compare(Comparator&& c) : _c(std::move(c)) {}
|
|
template <typename Comparable>
|
|
bool operator()(const Comparable& v, const rows_entry& e) const {
|
|
return _c(v, e._key);
|
|
}
|
|
template <typename Comparable>
|
|
bool operator()(const rows_entry& e, const Comparable& v) const {
|
|
return _c(e._key, v);
|
|
}
|
|
};
|
|
template <typename Comparator>
|
|
static auto key_comparator(Comparator&& c) {
|
|
return delegating_compare<Comparator>(std::move(c));
|
|
}
|
|
friend std::ostream& operator<<(std::ostream& os, const rows_entry& re);
|
|
bool equal(const schema& s, const rows_entry& other) const;
|
|
bool equal(const schema& s, const rows_entry& other, const schema& other_schema) const;
|
|
};
|
|
|
|
namespace db {
|
|
template<typename T>
|
|
class serializer;
|
|
}
|
|
|
|
class mutation_partition final {
|
|
public:
|
|
using rows_type = intrusive_set_external_comparator<rows_entry, &rows_entry::_link>;
|
|
friend class rows_entry;
|
|
friend class size_calculator;
|
|
private:
|
|
tombstone _tombstone;
|
|
row _static_row;
|
|
rows_type _rows;
|
|
// Contains only strict prefixes so that we don't have to lookup full keys
|
|
// in both _row_tombstones and _rows.
|
|
range_tombstone_list _row_tombstones;
|
|
|
|
template<typename T>
|
|
friend class db::serializer;
|
|
friend class mutation_partition_applier;
|
|
friend class converting_mutation_partition_applier;
|
|
public:
|
|
struct copy_comparators_only {};
|
|
mutation_partition(schema_ptr s)
|
|
: _rows()
|
|
, _row_tombstones(*s)
|
|
{ }
|
|
mutation_partition(mutation_partition& other, copy_comparators_only)
|
|
: _rows()
|
|
, _row_tombstones(other._row_tombstones, range_tombstone_list::copy_comparator_only())
|
|
{ }
|
|
mutation_partition(mutation_partition&&) = default;
|
|
mutation_partition(const mutation_partition&);
|
|
mutation_partition(const mutation_partition&, const schema&, query::clustering_key_filter_ranges);
|
|
mutation_partition(mutation_partition&&, const schema&, query::clustering_key_filter_ranges);
|
|
~mutation_partition();
|
|
mutation_partition& operator=(const mutation_partition& x);
|
|
mutation_partition& operator=(mutation_partition&& x) noexcept;
|
|
bool equal(const schema&, const mutation_partition&) const;
|
|
bool equal(const schema& this_schema, const mutation_partition& p, const schema& p_schema) const;
|
|
// Consistent with equal()
|
|
template<typename Hasher>
|
|
void feed_hash(Hasher& h, const schema& s) const {
|
|
hashing_partition_visitor<Hasher> v(h, s);
|
|
accept(s, v);
|
|
}
|
|
friend std::ostream& operator<<(std::ostream& os, const mutation_partition& mp);
|
|
public:
|
|
void apply(tombstone t) { _tombstone.apply(t); }
|
|
void apply_delete(const schema& schema, const exploded_clustering_prefix& prefix, tombstone t);
|
|
void apply_delete(const schema& schema, range_tombstone rt);
|
|
void apply_delete(const schema& schema, clustering_key&& key, tombstone t);
|
|
void apply_delete(const schema& schema, clustering_key_view key, tombstone t);
|
|
// Equivalent to applying a mutation with an empty row, created with given timestamp
|
|
void apply_insert(const schema& s, clustering_key_view, api::timestamp_type created_at);
|
|
// prefix must not be full
|
|
void apply_row_tombstone(const schema& schema, clustering_key_prefix prefix, tombstone t);
|
|
void apply_row_tombstone(const schema& schema, range_tombstone rt);
|
|
//
|
|
// Applies p to current object.
|
|
//
|
|
// Commutative when this_schema == p_schema. If schemas differ, data in p which
|
|
// is not representable in this_schema is dropped, thus apply() loses commutativity.
|
|
//
|
|
// Strong exception guarantees.
|
|
void apply(const schema& this_schema, const mutation_partition& p, const schema& p_schema);
|
|
//
|
|
// Applies p to current object.
|
|
//
|
|
// Commutative when this_schema == p_schema. If schemas differ, data in p which
|
|
// is not representable in this_schema is dropped, thus apply() loses commutativity.
|
|
//
|
|
// If exception is thrown, this object will be left in a state equivalent to the entry state
|
|
// and p will be left in a state which will commute with current object to the same value
|
|
// should the exception had not occurred.
|
|
void apply(const schema& this_schema, mutation_partition&& p, const schema& p_schema);
|
|
// Use in case this instance and p share the same schema.
|
|
// Same guarantees as apply(const schema&, mutation_partition&&, const schema&);
|
|
void apply(const schema& s, mutation_partition&& p);
|
|
// Same guarantees and constraints as for apply(const schema&, const mutation_partition&, const schema&).
|
|
void apply(const schema& this_schema, mutation_partition_view p, const schema& p_schema);
|
|
|
|
// Converts partition to the new schema. When succeeds the partition should only be accessed
|
|
// using the new schema.
|
|
//
|
|
// Strong exception guarantees.
|
|
void upgrade(const schema& old_schema, const schema& new_schema);
|
|
private:
|
|
void insert_row(const schema& s, const clustering_key& key, deletable_row&& row);
|
|
void insert_row(const schema& s, const clustering_key& key, const deletable_row& row);
|
|
|
|
uint32_t do_compact(const schema& s,
|
|
gc_clock::time_point now,
|
|
const std::vector<query::clustering_range>& row_ranges,
|
|
bool reverse,
|
|
uint32_t row_limit,
|
|
can_gc_fn&);
|
|
|
|
// Calls func for each row entry inside row_ranges until func returns stop_iteration::yes.
|
|
// Removes all entries for which func didn't return stop_iteration::no or wasn't called at all.
|
|
// Removes all entries that are empty, check rows_entry::empty().
|
|
// If reversed is true, func will be called on entries in reverse order. In that case row_ranges
|
|
// must be already in reverse order.
|
|
template<bool reversed, typename Func>
|
|
void trim_rows(const schema& s,
|
|
const std::vector<query::clustering_range>& row_ranges,
|
|
Func&& func);
|
|
public:
|
|
// Performs the following:
|
|
// - throws out data which doesn't belong to row_ranges
|
|
// - expires cells and tombstones based on query_time
|
|
// - drops cells covered by higher-level tombstones (compaction)
|
|
// - leaves at most row_limit live rows
|
|
//
|
|
// Note: a partition with a static row which has any cell live but no
|
|
// clustered rows still counts as one row, according to the CQL row
|
|
// counting rules.
|
|
//
|
|
// Returns the count of CQL rows which remained. If the returned number is
|
|
// smaller than the row_limit it means that there was no more data
|
|
// satisfying the query left.
|
|
//
|
|
// The row_limit parameter must be > 0.
|
|
//
|
|
uint32_t compact_for_query(const schema& s, gc_clock::time_point query_time,
|
|
const std::vector<query::clustering_range>& row_ranges, bool reversed, uint32_t row_limit);
|
|
|
|
// Performs the following:
|
|
// - expires cells based on compaction_time
|
|
// - drops cells covered by higher-level tombstones
|
|
// - drops expired tombstones which timestamp is before max_purgeable
|
|
void compact_for_compaction(const schema& s, can_gc_fn&,
|
|
gc_clock::time_point compaction_time);
|
|
|
|
// Returns the minimal mutation_partition that when applied to "other" will
|
|
// create a mutation_partition equal to the sum of other and this one.
|
|
// This and other must both be governed by the same schema s.
|
|
mutation_partition difference(schema_ptr s, const mutation_partition& other) const;
|
|
|
|
// Returns true if there is no live data or tombstones.
|
|
bool empty() const;
|
|
public:
|
|
deletable_row& clustered_row(const schema& s, const clustering_key& key);
|
|
deletable_row& clustered_row(const schema& s, clustering_key&& key);
|
|
deletable_row& clustered_row(const schema& s, const clustering_key_view& key);
|
|
public:
|
|
tombstone partition_tombstone() const { return _tombstone; }
|
|
row& static_row() { return _static_row; }
|
|
const row& static_row() const { return _static_row; }
|
|
// return a set of rows_entry where each entry represents a CQL row sharing the same clustering key.
|
|
const rows_type& clustered_rows() const { return _rows; }
|
|
const range_tombstone_list& row_tombstones() const { return _row_tombstones; }
|
|
rows_type& clustered_rows() { return _rows; }
|
|
range_tombstone_list& row_tombstones() { return _row_tombstones; }
|
|
const row* find_row(const schema& s, const clustering_key& key) const;
|
|
tombstone range_tombstone_for_row(const schema& schema, const clustering_key& key) const;
|
|
tombstone tombstone_for_row(const schema& schema, const clustering_key& key) const;
|
|
tombstone tombstone_for_row(const schema& schema, const rows_entry& e) const;
|
|
boost::iterator_range<rows_type::const_iterator> range(const schema& schema, const query::clustering_range& r) const;
|
|
rows_type::const_iterator lower_bound(const schema& schema, const query::clustering_range& r) const;
|
|
rows_type::const_iterator upper_bound(const schema& schema, const query::clustering_range& r) const;
|
|
rows_type::iterator lower_bound(const schema& schema, const query::clustering_range& r);
|
|
rows_type::iterator upper_bound(const schema& schema, const query::clustering_range& r);
|
|
boost::iterator_range<rows_type::iterator> range(const schema& schema, const query::clustering_range& r);
|
|
// Writes this partition using supplied query result writer.
|
|
// The partition should be first compacted with compact_for_query(), otherwise
|
|
// results may include data which is deleted/expired.
|
|
// At most row_limit CQL rows will be written and digested.
|
|
void query_compacted(query::result::partition_writer& pw, const schema& s, uint32_t row_limit) const;
|
|
void accept(const schema&, mutation_partition_visitor&) const;
|
|
|
|
// Returns the number of live CQL rows in this partition.
|
|
//
|
|
// Note: If no regular rows are live, but there's something live in the
|
|
// static row, the static row counts as one row. If there is at least one
|
|
// regular row live, static row doesn't count.
|
|
//
|
|
size_t live_row_count(const schema&,
|
|
gc_clock::time_point query_time = gc_clock::time_point::min()) const;
|
|
|
|
bool is_static_row_live(const schema&,
|
|
gc_clock::time_point query_time = gc_clock::time_point::min()) const;
|
|
private:
|
|
template<typename Func>
|
|
void for_each_row(const schema& schema, const query::clustering_range& row_range, bool reversed, Func&& func) const;
|
|
friend class counter_write_query_result_builder;
|
|
};
|
|
|
|
// A shadowable row tombstone is valid only if the row has no live marker. In other words,
|
|
// the row tombstone is only valid as long as no newer insert is done (thus setting a
|
|
// live row marker; note that if the row timestamp set is lower than the tombstone's,
|
|
// then the tombstone remains in effect as usual). If a row has a shadowable tombstone
|
|
// with timestamp Ti and that row is updated with a timestamp Tj, such that Tj > Ti
|
|
// (and that update sets the row marker), then the shadowable tombstone is shadowed by
|
|
// that update. A concrete consequence is that if the update has cells with timestamp
|
|
// lower than Ti, then those cells are preserved (since the deletion is removed), and
|
|
// this is contrary to a regular, non-shadowable row tombstone where the tombstone is
|
|
// preserved and such cells are removed.
|
|
bool row_tombstone_is_shadowed(const schema& schema, const tombstone& row_tombstone, const row_marker& marker);
|