Lei, HUANG c6b10bfbb9 feat(function): add mergeable stddev_pop state functions (#8972) ...

* feat(function): add Welford stddev functions

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* test(function): cover merged Welford time windows

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* refactor(function): use stddev_pop SQL names

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* fix(function): make Welford arithmetic partition-stable

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* fix(function): reject invalid singleton Welford states

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* test(function): pin Welford state compatibility

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* refactor(function): remove unreachable variance clamp

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* fix(function): reject DISTINCT Welford aggregates

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

* test(compat): bound Welford downgrade targets

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

---------

Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>

2026-08-31 14:15:33 +00:00

..

approx_distinct.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_distinct.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_median.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_median.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_percentile_cont_with_weight.result

chore: upgrade DataFusion family, again (#7578)

2026-03-03 07:36:39 +00:00

approx_percentile_cont_with_weight.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_percentile_cont.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

approx_percentile_cont.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

array_agg.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

array_agg.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

avg.result

chore: upgrade DataFusion family, again (#7578)

2026-03-03 07:36:39 +00:00

avg.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

bit_operations.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

bit_operations.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

bool_agg.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

bool_agg.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

corr.result

chore: update datafusion to 50 (#7076)

2025-10-23 07:18:36 +00:00

corr.sql

chore: update datafusion to 50 (#7076)

2025-10-23 07:18:36 +00:00

covar.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

covar.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

distinct_order_by.result

build(deps): bump datafusion 20240528 (#4061)

2024-06-01 14:03:00 +00:00

distinct_order_by.sql

feat: only allow timestamp type as time index (#2281)

2023-09-12 07:57:15 -05:00

distinct.result

perf(query): choose bounded CTE as hash join build side (#8807)

2026-08-13 10:51:53 +00:00

distinct.sql

perf: treat DISTINCT as comm/part-comm (#7348)

2025-12-04 11:14:00 +00:00

first_last.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

first_last.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

hll.result

feat: impl hll_state, hll_merge and hll_calc for incremental distinct counting (#5579)

2025-02-24 19:07:37 +00:00

hll.sql

feat: impl hll_state, hll_merge and hll_calc for incremental distinct counting (#5579)

2025-02-24 19:07:37 +00:00

median.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

median.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

min_max.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

min_max.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

multi_regions.result

perf(query): choose bounded CTE as hash join build side (#8807)

2026-08-13 10:51:53 +00:00

multi_regions.sql

feat: dist auto step aggr pushdown (#6268)

2025-06-20 07:18:55 +00:00

regression.result

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

regression.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

stddev.result

chore: update datafusion to 50 (#7076)

2025-10-23 07:18:36 +00:00

stddev.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

string_agg.result

feat: supports large string (#7097)

2025-10-17 01:46:11 +00:00

string_agg.sql

test: migrate aggregation tests from duckdb, part4 (#6965)

2025-09-25 08:00:17 +00:00

sum.result

feat!: Bump datafusion, prost, hyper, tonic, tower, axum (#5417)

2025-01-23 06:15:40 +00:00

sum.sql

feat: only allow timestamp type as time index (#2281)

2023-09-12 07:57:15 -05:00

uddsketch.result

feat(function): expose uddsketch rank (#8929)

2026-08-25 11:31:47 +00:00

uddsketch.sql

feat(function): expose uddsketch rank (#8929)

2026-08-25 11:31:47 +00:00

welford.result

feat(function): add mergeable stddev_pop state functions (#8972)

2026-08-31 14:15:33 +00:00

welford.sql

feat(function): add mergeable stddev_pop state functions (#8972)

2026-08-31 14:15:33 +00:00