Struct polars::export::arrow::io::parquet::read::RowGroupMetaData

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pub struct RowGroupMetaData { /* private fields */ }

This is supported on crate feature io_parquet only.

Expand description

Metadata for a row group.

Implementations

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impl RowGroupMetaData

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pub fn new(
 columns: Vec<ColumnChunkMetaData, Global>,
 num_rows: i64,
 total_byte_size: i64
) -> RowGroupMetaData

Create a new RowGroupMetaData

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pub fn num_columns(&self) -> usize

Number of columns in this row group.

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pub fn column(&self, i: usize) -> &ColumnChunkMetaData

Returns column chunk metadata for ith column.

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pub fn columns(&self) -> &[ColumnChunkMetaData ]

Returns slice of column chunk metadata.

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pub fn num_rows(&self) -> i64

Number of rows in this row group.

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pub fn total_byte_size(&self) -> i64

Total byte size of all uncompressed column data in this row group.

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pub fn compressed_size(&self) -> i64

Total size of all compressed column data in this row group.

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pub fn try_from_thrift(
schema_descr: &SchemaDescriptor,
rg: RowGroup
) -> Result<RowGroupMetaData, ParquetError>

Method to convert from Thrift.

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pub fn into_thrift(self) -> RowGroup

Method to convert to Thrift.

Trait Implementations

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impl Clone for RowGroupMetaData

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fn clone(&self) -> RowGroupMetaData

Returns a copy of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for RowGroupMetaData

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl RefUnwindSafe for RowGroupMetaData

impl Send for RowGroupMetaData

impl Sync for RowGroupMetaData

impl Unpin for RowGroupMetaData

impl UnwindSafe for RowGroupMetaData

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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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

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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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.

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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

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

Initializes a with the given initializer. Read more

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

Dereferences the given pointer. Read more

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

Mutably dereferences the given pointer. Read more

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unsafe fn drop(ptr: usize)

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

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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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.

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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.

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

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Struct polars::export::arrow::io::parquet::read::RowGroupMetaData

Implementations

impl RowGroupMetaData

pub fn new( columns: Vec<ColumnChunkMetaData, Global>, num_rows: i64, total_byte_size: i64) -> RowGroupMetaData

pub fn num_columns(&self) -> usize

pub fn column(&self, i: usize) -> &ColumnChunkMetaData

pub fn columns(&self) -> &[ColumnChunkMetaData]

pub fn num_rows(&self) -> i64

pub fn total_byte_size(&self) -> i64

pub fn compressed_size(&self) -> i64

pub fn try_from_thrift( schema_descr: &SchemaDescriptor, rg: RowGroup) -> Result<RowGroupMetaData, ParquetError>

pub fn into_thrift(self) -> RowGroup

Trait Implementations

impl Clone for RowGroupMetaData

fn clone(&self) -> RowGroupMetaData

fn clone_from(&mut self, source: &Self)

impl Debug for RowGroupMetaData

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Auto Trait Implementations

impl RefUnwindSafe for RowGroupMetaData

impl Send for RowGroupMetaData

impl Sync for RowGroupMetaData

impl Unpin for RowGroupMetaData

impl UnwindSafe for RowGroupMetaData

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> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

pub fn new(
columns: Vec<ColumnChunkMetaData, Global>,
num_rows: i64,
total_byte_size: i64
) -> RowGroupMetaData

pub fn columns(&self) -> &[ColumnChunkMetaData ]

pub fn try_from_thrift(
schema_descr: &SchemaDescriptor,
rg: RowGroup
) -> Result<RowGroupMetaData, ParquetError>

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> ToOwned for T where
T: Clone,

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>,