ReaderRowGroups

parquet::arrow::arrow_reader

Struct ReaderRowGroups 

Source 
struct ReaderRowGroups<T: ChunkReader> {
    reader: Arc<T>,
    metadata: Arc<ParquetMetaData>,
    row_groups: Vec<usize>,
}

Fields§

§reader: Arc<T>§metadata: Arc<ParquetMetaData>§row_groups: Vec<usize>

Optional list of row group indices to scan

Trait Implementations§

Source§

impl<T: ChunkReader + 'static> RowGroups for ReaderRowGroups<T>

Source§

fn num_rows(&self) -> usize

Get the number of rows in this collection
Source§

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

Returns a PageIterator for all pages in the specified column chunk across all row groups in this collection.
Source§

fn row_groups(&self) -> Box<dyn Iterator<Item = &RowGroupMetaData> + '_>

Returns an iterator over the row groups in this collection Read more
Source§

fn metadata(&self) -> &ParquetMetaData

Returns the parquet metadata

Auto Trait Implementations§

§

impl<T> Freeze for ReaderRowGroups<T>

§

impl<T> !RefUnwindSafe for ReaderRowGroups<T>

§

impl<T> Send for ReaderRowGroups<T>

§

impl<T> Sync for ReaderRowGroups<T>

§

impl<T> Unpin for ReaderRowGroups<T>

§

impl<T> !UnwindSafe for ReaderRowGroups<T>

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<V, T> VZip<V> for T
where V: MultiLane<T>,

§

fn vzip(self) -> V

§

impl<T> Ungil for T
where T: Send,