- lots of static_cast
- add safe_cast
- types adjustments
- config
- IStorage::read/watch
- ...
- some TODO's (to convert types in future)
P.S. That was quite a journey...
v2: fixes after rebase
v3: fix conflicts after #42308 merged
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
* impl
* stash
* clean up
* do not apply when HT is small
* make branch static
* also in merge
* do not hardcode look ahead value
* fix
* apply to methods with cheap key calculation
* more tests
* silence tidy
* fix build
* support HashMethodKeysFixed
* apply during merge only for cheap
* stash
* fixes
* rename method
* add feature flag
* cache prefetch threshold value
* fix
* fix
* Update HashMap.h
* fix typo
* 256KB as default l2 size
Co-authored-by: Alexey Milovidov <milovidov@clickhouse.com>
First part, updated most UTF8, hashing, memory and codecs. Except
utf8lower and upper, maybe a little later.
That includes huge amount of research with movemask dealing. Exact
details and blog post TBD.
* use AggregationMethod ctor with reserve
* add new settings
* add HashTablesStatistics
* support queries with limit
* support distributed and with external aggregation
* add new profile events
* add some tests
* add perf test
* export cache stats through AsynchronousMetrics
* rm redundant trace
* fix style
* fix 02122_parallel_formatting test
* review fixes
* fix 02122_parallel_formatting test
* apply also to two-level HTs
* try simpler strategy
* increase max_size_to_preallocate_for_aggregation for experiment
* fixes
* Revert "increase max_size_to_preallocate_for_aggregation for experiment"
This reverts commit 6cf6f75704.
* fix test
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
- enable_if is usually regarded as fragile and unreadable
- C++20 concepts are much easier to read and produce more expressive error messages
- this is follow-up to PR #35347 but this time most of the remaining and
more complex usages of enable_if in the codebase were replaced.
