Function update_partition 

pub fn update_partition(
    lake: Arc<DataLakeConnection>,
    view_meta: ViewMetadata,
    schema: Arc<Schema>,
    convert_ticks: &ConvertTicks,
    spec: &SourceDataBlocksInMemory,
    same_run_ranges: &mut Vec<TimeRange>,
) -> impl Future<Output = Result<(), Error>>

Rebuilds the partition if it’s missing or out of date.

same_run_ranges accumulates the insert ranges every partition this jit_update run has already handled – written, or found already up to date – earlier in its loop. This call reads it (to pass to retire_partitions via RetireMatch::Overlap, protecting those earlier partitions from this write) and appends spec’s own range before returning.

pub only so thread_spans_ordering_db_test.rs can write a single JIT partition directly, with exact boundaries jit_update’s loop wouldn’t expose; rust/analytics/tests/ compiles as an external crate and can only reach pub items. Not intended as API. (net_spans_view::update_partition stays private because its tests drive retire_partitions directly instead – there is no Rust producer of net streams to push blocks through.)