Dennis Zhuang 47f439ea07 fix(promql): keep other fields when one has no sample in the window ...

Review follow-up. Two things surfaced once range functions started
returning NULL for a window without samples.

The filter after a function call required every field column to be
non-NULL, so on a multi-field table one field with no samples in a
window would drop the other fields' results with it. It now keeps a row
when any field has a sample, which is the shape a selector already
emits. On a single field column the two predicates are identical.

`quantile_over_time` returned NaN rather than NULL for a window without
samples, so the row survived that filter. Prometheus returns an empty
vector there, so the emptiness check now sits in the range UDF; the
shared quantile kernel still yields NaN for an empty slice, matching
upstream's `quantile()` helper that `quantile_aggr` depends on.

Signed-off-by: Dennis Zhuang <killme2008@gmail.com>

2026-09-11 20:47:12 +08:00

..

distributed

perf(promql): push down last row for instant queries (#9034)

2026-09-09 12:38:52 +00:00

standalone

fix(promql): keep other fields when one has no sample in the window

2026-09-11 20:47:12 +08:00