Struct ArrowReaderBuilder

Source

pub struct ArrowReaderBuilder { /* private fields */ }

Expand description

Builder to create ArrowReader

Implementations§

Source §

impl ArrowReaderBuilder

Source

pub fn new(file_io: FileIO) -> Self

Create a new ArrowReaderBuilder

Source

pub fn with_data_file_concurrency_limit(self, val: usize) -> Self

Sets the max number of in flight data files that are being fetched

Source

pub fn with_batch_size(self, batch_size: usize) -> Self

Sets the desired size of batches in the response to something other than the default

Source

pub fn with_row_group_filtering_enabled( self, row_group_filtering_enabled: bool, ) -> Self

Determines whether to enable row group filtering.

Source

pub fn with_row_selection_enabled(self, row_selection_enabled: bool) -> Self

Determines whether to enable row selection.

Source

pub fn with_metadata_size_hint(self, metadata_size_hint: usize) -> Self

Provide a hint as to the number of bytes to prefetch for parsing the Parquet metadata

This hint can help reduce the number of fetch requests. For more details see the ParquetMetaDataReader documentation.

Source

pub fn build(self) -> ArrowReader

Build the ArrowReader.

Auto Trait Implementations§

§

impl !UnwindSafe for ArrowReaderBuilder

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

§

impl As for U

§

fn as_<T>(self) -> T
where T: CastFrom,

Casts self to type T. The semantics of numeric casting with the as operator are followed, so <T as As>::as_:: can be used in the same way as T as U for numeric conversions. Read more

§

impl<T> AsAny for T
where T: Any,

§

fn as_any(&self) -> &(dyn Any + 'static)

§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

§

fn type_name(&self) -> &'static str

Gets the type name of self

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

§

impl<T> Downcast for T
where T: AsAny + ?Sized,

§

fn is<T>(&self) -> bool
where T: AsAny,

Returns true if the boxed type is the same as T. Read more

§

fn downcast_ref<T>(&self) -> Option<&T>
where T: AsAny,

Forward to the method defined on the type Any.

§

fn downcast_mut<T>(&mut self) -> Option<&mut T>
where T: AsAny,

Forward to the method defined on the type Any.

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<T> Instrument for T

§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

impl<T, U> Into 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

§