discord9anddiscord9 983738101a feat(flow): admit mergeable average states in incremental plans (#9235) ...

Incremental batching flows already merge sink state for scalar
aggregates and the HLL/UDDSketch/stddev state families. AVG now exposes
a mergeable Binary state (avg_state / avg_merge with
__avg_state_delta_merge), so admit those aggregates too instead of
forcing a full snapshot for flows whose only state column is an
average.

merge_op_for_aggregate_expr takes the aggregate input schema so the
avg_merge arm can require a Binary state argument; the state form is
the aggregate result persisted by the sink, so no extra coercion is
needed. Other input types keep being rejected.

Also cover avg_state, avg_merge and duplicate AVG projections in the
incremental plan analysis tests, extend the mixed state-family rewrite
test with an average column, and extend the standalone partitioned
state-merge SQLness case with avg_state/avg_merge compared against a
direct avg over the source.

Signed-off-by: discord9 <discord9@outlook.com>
Co-authored-by: discord9 <discord9@outlook.com>

2026-09-18 11:34:32 +00:00

..

distributed

fix: preserve structured query errors through distributed execution (#9161)

2026-09-16 06:28:15 +00:00

standalone

feat(flow): admit mergeable average states in incremental plans (#9235)

2026-09-18 11:34:32 +00:00