Struct DFOpaque 

pub struct DFOpaque { /* private fields */ }

Defines the extension type logic for the canonical arrow.opaque extension type. This extension type represents types that DataFusion cannot interpret.

See DFExtensionType for information on DataFusion’s extension type mechanism. See also Opaque for the implementation of arrow-rs, which this type uses internally.

https://arrow.apache.org/docs/format/CanonicalExtensions.html#opaque

Implementations

impl DFOpaque

pub fn try_new( data_type: &DataType, metadata: <Opaque as ExtensionType>::Metadata, ) -> Result<Self>

Creates a new DFOpaque, validating that the storage type is compatible with the extension type.

Trait Implementations

impl Clone for DFOpaque

fn clone(&self) -> DFOpaque

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl DFExtensionType for DFOpaque

fn storage_type(&self) -> DataType

Returns the underlying storage type.

fn serialize_metadata(&self) -> Option<String>

Returns the serialized metadata.

fn create_array_formatter<'fmt>( &self, _array: &'fmt dyn Array, _options: &FormatOptions<'fmt>, ) -> Result<Option<ArrayFormatter<'fmt>>>

Returns an ArrayFormatter that can format values of this type.

impl Debug for DFOpaque

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

Formats the value using the given formatter.