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feat(function): add mergeable binary average states

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Signed-off-by: discord9 <discord9@163.com>
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discord9
2026-09-08 11:28:42 +08:00
parent a932433d21
commit e629520e52
6 changed files with 634 additions and 0 deletions
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tests/compatibility/cases/avg_state_binary/verify.sql
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-- The persisted states have counts 2 and 1 and sums 3.0 and 6.0.
-- Null and canonical empty states do not change the merged AVG1 state.
SELECT avg_merge(state) = X'4156473103000000000000000000000000002240' AS merged_state_matches
FROM avg1_states;
-- A new state over the equivalent Float64 values has the exact same AVG1 bytes.
WITH generated_values AS (
SELECT CAST(1.0 AS DOUBLE) AS value
UNION ALL SELECT CAST(2.0 AS DOUBLE)
UNION ALL SELECT CAST(6.0 AS DOUBLE)
)
SELECT avg_state(value) = X'4156473103000000000000000000000000002240' AS generated_state_matches
FROM generated_values;
-- A null-only merge is the canonical empty AVG1 state.
SELECT avg_merge(state) = X'4156473100000000000000000000000000000000' AS null_state_is_empty
FROM avg1_states
WHERE state IS NULL;