mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-10 09:32:06 +00:00
42 lines
2.0 KiB
SQL
42 lines
2.0 KiB
SQL
-- input is table(query text, run UInt32, version int, time float)
|
|
select
|
|
-- abs(diff_percent) > rd_quantiles_percent[3] fail,
|
|
floor(original_medians_array.time_by_version[1], 4) l,
|
|
floor(original_medians_array.time_by_version[2], 4) r,
|
|
floor((r - l) / l, 3) diff_percent,
|
|
arrayMap(x -> floor(x / l, 3), rd.rd_quantiles) rd_quantiles_percent,
|
|
query
|
|
from
|
|
(
|
|
select query, quantiles(0.05, 0.5, 0.95)(abs(time_by_label[1] - time_by_label[2])) rd_quantiles -- quantiles of randomization distribution
|
|
from
|
|
(
|
|
select query, virtual_run, groupArrayInsertAt(median_time, random_label) time_by_label -- make array 'random label' -> 'median time'
|
|
from (
|
|
select query, medianExact(time) median_time, virtual_run, random_label -- get median times, grouping by random label
|
|
from (
|
|
select *, toUInt32(rowNumberInBlock() % 2) random_label -- randomly relabel measurements
|
|
from (
|
|
select query, time, number virtual_run
|
|
from table, numbers(1, 10000) -- duplicate input measurements into many virtual runs
|
|
order by query, virtual_run, rand() -- for each virtual run, randomly reorder measurements
|
|
) virtual_runs
|
|
) relabeled
|
|
group by query, virtual_run, random_label
|
|
) virtual_medians
|
|
group by query, virtual_run -- aggregate by random_label
|
|
) virtual_medians_array
|
|
group by query -- aggregate by virtual_run
|
|
) rd,
|
|
(
|
|
select groupArrayInsertAt(median_time, version) time_by_version, query
|
|
from
|
|
(
|
|
select medianExact(time) median_time, query, version
|
|
from table group by query, version
|
|
) original_medians
|
|
group by query
|
|
) original_medians_array
|
|
where rd.query = original_medians_array.query
|
|
order by rd_quantiles_percent[3] desc;
|