Struct polars_io::parquet::ParquetWriter

source · [−]

pub struct ParquetWriter<W> { /* private fields */ }

Expand description

Write a DataFrame to parquet format

Example

Implementations

source

impl<W> ParquetWriter<W> where
W: Write,

source

pub fn new(writer: W) -> Self where
W: Write,

Create a new writer

source

pub fn with_compression(self, compression: Compression) -> Self

Set the compression used. Defaults to Snappy.

source

pub fn with_statistics(self, statistics: bool) -> Self

source

pub fn finish(self, df: &mut DataFrame) -> Result<()>

Write the given DataFrame in the the writer W.

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

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,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

source

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

source

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

source

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

const: unstable · 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> Pointable for T

source

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

source

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

source

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

source

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

source

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

source

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

source

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

source

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

source

Struct polars_io::parquet::ParquetWriter

Example

Implementations

impl<W> ParquetWriter<W> where
W: Write,

pub fn new(writer: W) -> Self where
W: Write,

pub fn with_compression(self, compression: Compression) -> Self

pub fn with_statistics(self, statistics: bool) -> Self

pub fn finish(self, df: &mut DataFrame) -> Result<()>

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

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

type Error = Infallible

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

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

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

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

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

fn vzip(self) -> V

Struct polars_io::parquet::ParquetWriter

Example

Implementations

impl<W> ParquetWriter<W> where W: Write,

pub fn new(writer: W) -> Self where W: Write,

pub fn with_compression(self, compression: Compression) -> Self

pub fn with_statistics(self, statistics: bool) -> Self

pub fn finish(self, df: &mut DataFrame) -> Result<()>

Auto Trait Implementations

impl<W> RefUnwindSafe for ParquetWriter<W> where W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where W: Send,

impl<W> Sync for ParquetWriter<W> where W: Sync,

impl<W> Unpin for ParquetWriter<W> where W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where W: UnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

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

type Error = Infallible

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

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

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

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

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

fn vzip(self) -> V

impl<W> ParquetWriter<W> where
W: Write,

pub fn new(writer: W) -> Self where
W: Write,

impl<W> RefUnwindSafe for ParquetWriter<W> where
W: RefUnwindSafe,

impl<W> Send for ParquetWriter<W> where
W: Send,

impl<W> Sync for ParquetWriter<W> where
W: Sync,

impl<W> Unpin for ParquetWriter<W> where
W: Unpin,

impl<W> UnwindSafe for ParquetWriter<W> where
W: UnwindSafe,

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

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

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

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

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

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

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