Commit Graph

1 Commits

Author SHA1 Message Date
frinkr
18c50c11b3
Multithreading after window functions ()
* feat: Preserve number of streams after evaluation the window functions to allow parallel stream processing

* fix style

* fix style

* fix style

* setting query_plan_preserve_num_streams_after_window_functions default true

* fix tests by SETTINGS query_plan_preserve_num_streams_after_window_functions=0

* fix test references

* Resize the streams after the last window function, to keep the order between WindowTransforms (and WindowTransform works on single stream anyway).

* feat: Preserve number of streams after evaluation the window functions to allow parallel stream processing

* fix style

* fix style

* fix style

* setting query_plan_preserve_num_streams_after_window_functions default true

* fix tests by SETTINGS query_plan_preserve_num_streams_after_window_functions=0

* fix test references

* Resize the streams after the last window function, to keep the order between WindowTransforms (and WindowTransform works on single stream anyway).

* add perf test

* perf: change the dataset from 50M to 5M

* rename query_plan_preserve_num_streams_after_window_functions -> query_plan_enable_multithreading_after_window_functions

* update test reference

* fix clang-tidy

---------

Co-authored-by: Nikita Taranov <nikita.taranov@clickhouse.com>
2023-10-27 12:36:28 +02:00