polars_arrow::io::ipc::read

Struct FileMetadata

pub struct FileMetadata {
    pub schema: ArrowSchemaRef,
    pub custom_schema_metadata: Option<Arc<Metadata>>,
    pub ipc_schema: IpcSchema,
    pub blocks: Vec<Block>,
    pub size: u64,
    /* private fields */
}

Available on crate feature io_ipc only.

Expand description

Metadata of an Arrow IPC file, written in the footer of the file.

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§schema: ArrowSchemaRef

The schema that is read from the file footer

§custom_schema_metadata: Option<Arc<Metadata>>

The custom metadata that is read from the schema

§ipc_schema: IpcSchema

The files’ IpcSchema

§blocks: Vec<Block>

The blocks in the file

A block indicates the regions in the file to read to get data

§size: u64

The total size of the file in bytes

Trait Implementations§

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impl Clone for FileMetadata

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fn clone(&self) -> FileMetadata

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 FileMetadata

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for FileMetadata

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,

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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,

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

Mutably borrows from an owned value. Read more

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

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

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

Performs copy-assignment from self to dst. Read more

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

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> IntoEither for T

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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

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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

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