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ColumnMetadata

parquet_lite::types

Struct ColumnMetadata

pub struct ColumnMetadata {
    pub name: String,
    pub physical_type: ParquetType,
    pub encoding: Encoding,
    pub compression: Compression,
    pub num_values: i64,
    pub data_offset: i64,
    pub total_compressed_size: i64,
    pub total_uncompressed_size: i64,
}

Expand description

Metadata for a single column chunk

Fields§

§name: String

Column name extracted from schema

§physical_type: ParquetType

Physical type of the column

§encoding: Encoding

Encoding used

§compression: Compression

Compression codec used

§num_values: i64

Number of values in this column chunk

§data_offset: i64

Byte offset of the column chunk data in the file

§total_compressed_size: i64

Total compressed size in bytes

§total_uncompressed_size: i64

Total uncompressed size in bytes

Trait Implementations§

impl Clone for ColumnMetadata

fn clone(&self) -> ColumnMetadata

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Debug for ColumnMetadata

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for ColumnMetadata

impl RefUnwindSafe for ColumnMetadata

impl Send for ColumnMetadata

impl Sync for ColumnMetadata

impl Unpin for ColumnMetadata

impl UnsafeUnpin for ColumnMetadata

impl UnwindSafe for ColumnMetadata

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

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

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

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,