Struct DFJson 

pub struct DFJson { /* private fields */ }

Defines the extension type logic for the canonical arrow.json extension type. This extension type defines that a particular string field stores JSON values.

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

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

Implementations

impl DFJson

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

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

Trait Implementations

impl Clone for DFJson

fn clone(&self) -> DFJson

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl DFExtensionType for DFJson

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 DFJson

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

Formats the value using the given formatter.