Struct re_chunk_store::store::ChunkIdSetPerTime

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pub struct ChunkIdSetPerTime {
    pub(crate) max_interval_length: u64,
    pub(crate) per_start_time: BTreeMap<TimeInt, BTreeSet<ChunkId>>,
    pub(crate) per_end_time: BTreeMap<TimeInt, BTreeSet<ChunkId>>,
}

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§max_interval_length: u64

Keeps track of the longest interval being currently stored in the two maps below.

This is used to bound the backwards linear walk when looking for overlapping chunks in latest-at queries.

See ChunkStore::latest_at implementation comments for more details.

§per_start_time: BTreeMap<TimeInt, BTreeSet<ChunkId>>

[ChunkId]s organized by their most specific start time.

What “most specific” means depends on the context in which the ChunkIdSetPerTime was instantiated, e.g.:

  • For an (entity, timeline, component) index, that would be the first timestamp at which this [Chunk] contains data for this particular component on this particular timeline (see [Chunk::time_range_per_component]).
  • For an (entity, timeline) index, that would be the first timestamp at which this [Chunk] contains data for any component on this particular timeline (see [re_chunk::TimeColumn::time_range]).
§per_end_time: BTreeMap<TimeInt, BTreeSet<ChunkId>>

[ChunkId]s organized by their most specific end time.

What “most specific” means depends on the context in which the ChunkIdSetPerTime was instantiated, e.g.:

  • For an (entity, timeline, component) index, that would be the last timestamp at which this [Chunk] contains data for this particular component on this particular timeline (see [Chunk::time_range_per_component]).
  • For an (entity, timeline) index, that would be the last timestamp at which this [Chunk] contains data for any component on this particular timeline (see [re_chunk::TimeColumn::time_range]).

Trait Implementations§

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impl Clone for ChunkIdSetPerTime

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fn clone(&self) -> ChunkIdSetPerTime

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ChunkIdSetPerTime

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for ChunkIdSetPerTime

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fn default() -> ChunkIdSetPerTime

Returns the “default value” for a type. Read more

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