parquet::arrow::async_reader

Struct InMemoryRowGroup

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struct InMemoryRowGroup<'a> {
    metadata: &'a RowGroupMetaData,
    offset_index: Option<&'a [OffsetIndexMetaData]>,
    column_chunks: Vec<Option<Arc<ColumnChunkData>>>,
    row_count: usize,
}
Expand description

An in-memory collection of column chunks

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§metadata: &'a RowGroupMetaData§offset_index: Option<&'a [OffsetIndexMetaData]>§column_chunks: Vec<Option<Arc<ColumnChunkData>>>§row_count: usize

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impl<'a> InMemoryRowGroup<'a>

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async fn fetch<T: AsyncFileReader + Send>( &mut self, input: &mut T, projection: &ProjectionMask, selection: Option<&RowSelection>, ) -> Result<()>

Fetches the necessary column data into memory

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impl RowGroups for InMemoryRowGroup<'_>

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fn num_rows(&self) -> usize

Get the number of rows in this collection
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fn column_chunks(&self, i: usize) -> Result<Box<dyn PageIterator>>

Returns a PageIterator for the column chunks with the given leaf column index

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impl<'a> Freeze for InMemoryRowGroup<'a>

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impl<'a> RefUnwindSafe for InMemoryRowGroup<'a>

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impl<'a> Send for InMemoryRowGroup<'a>

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impl<'a> Sync for InMemoryRowGroup<'a>

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impl<'a> Unpin for InMemoryRowGroup<'a>

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impl<'a> UnwindSafe for InMemoryRowGroup<'a>

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impl<T> Any for T
where T: 'static + ?Sized,

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impl<T> From<T> for T

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fn from(t: T) -> T

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impl<T, U> Into<U> for T
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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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type Error = Infallible

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impl<T, U> TryInto<U> for T
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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> Allocation for T
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impl<T> MaybeSendSync for T