parquet::arrow::async_reader

Struct InMemoryRowGroup

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

An in-memory collection of column chunks

Fields§

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

Implementations§

Source§

impl InMemoryRowGroup<'_>

Source

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

Fetches the necessary column data into memory

Trait Implementations§

Source§

impl RowGroups for InMemoryRowGroup<'_>

Source§

fn column_chunks(&self, i: usize) -> Result<Box<dyn PageIterator>>

Return chunks for column i

Source§

fn num_rows(&self) -> usize

Get the number of rows in this collection

Auto Trait Implementations§

§

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

§

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

§

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

§

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

§

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

§

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

Blanket Implementations§

Source§

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

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

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

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T> IntoEither for T

Source§

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
Source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

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

Performs the conversion.
§

impl<T> ErasedDestructor for T
where T: 'static,

§

impl<T> MaybeSendSync for T