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RowDecoder

lance_nd

Struct RowDecoder 

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pub struct RowDecoder { /* private fields */ }
Expand description

Decodes the rows of one record batch of a table, one row at a time.

A null variable is absent from its row. The grid of each row is inferred from its variables, as in the nd-arrow format.

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impl RowDecoder

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pub fn try_new(batch: &RecordBatch) -> Result<Self>

A decoder for batch. Each column must be an nd column, the global attributes column or a stats column, which the decoder ignores. The Lance encoding keys are removed.

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pub fn num_rows(&self) -> usize

The number of rows in the batch.

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pub fn row(&self, row: usize) -> Result<NdRecordBatch>

Decode row row. Panics when row is out of bounds.

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pub fn into_rows( self, ) -> impl Iterator<Item = Result<NdRecordBatch>> + Send + 'static

Decode the rows one at a time, in order.

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impl Clone for RowDecoder

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fn clone(&self) -> Self

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 RowDecoder

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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<T> Any for T
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fn type_id(&self) -> TypeId

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fn borrow(&self) -> &T

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fn borrow_mut(&mut self) -> &mut T

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
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impl<T> CloneToUninit for T
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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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where Self: Binary,

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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

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