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DataOverlayFile

lance_table::format::overlay

Struct DataOverlayFile 

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pub struct DataOverlayFile {
    pub data_file: DataFile,
    pub coverage: OverlayCoverage,
    pub committed_version: u64,
}
Expand description

An overlay file supplies new values for a subset of (physical offset, field) cells within a fragment, without rewriting the fragment’s base data files. See the module documentation for the coverage, rank, and versioning rules.

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§data_file: DataFile

The data file storing the overlay’s new cell values.

§coverage: OverlayCoverage

Which cells this overlay provides values for.

§committed_version: u64

The dataset version at which this overlay became effective (the version of the commit that introduced it, stamped at commit time and re-stamped on retry). Higher wins when two overlays cover the same (offset, field).

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impl DataOverlayFile

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pub fn coverage_for_field(&self, field_pos: usize) -> Result<Arc<RoaringBitmap>>

The parsed coverage bitmap that applies to the field stored at field_pos within data_file.fields.

For a dense overlay the same shared bitmap is returned for every field; for a sparse overlay the per-field bitmap at field_pos is returned. The bitmap is already parsed, so this is a cheap Arc clone.

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impl Clone for DataOverlayFile

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fn clone(&self) -> DataOverlayFile

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

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

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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 DeepSizeOf for DataOverlayFile

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fn deep_size_of_children(&self, __context: &mut Context) -> usize

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fn deep_size_of(&self) -> usize

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impl<'de> Deserialize<'de> for DataOverlayFile

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Eq for DataOverlayFile

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impl From<&DataOverlayFile> for DataOverlayFile

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fn from(overlay: &DataOverlayFile) -> Self

Converts to this type from the input type.
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impl PartialEq for DataOverlayFile

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fn eq(&self, other: &DataOverlayFile) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl Serialize for DataOverlayFile

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for DataOverlayFile

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impl TryFrom<DataOverlayFile> for DataOverlayFile

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(proto: DataOverlayFile) -> Result<Self>

Performs the conversion.

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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