Trait CustomDataSerialize 

pub trait CustomDataSerialize: CustomDataTrait {
    // Required methods
    fn schema(&self) -> Result<Schema>;
    fn encode_record_batch(
        &self,
        items: &[Arc<dyn CustomDataTrait>],
    ) -> Result<RecordBatch>;
}

Trait for custom data types that support Arrow schema and record batch encoding. Used as a type bound by the #[custom_data] macro; catalog encoding goes through the registry, not this trait directly.

Implemented by the #[custom_data] macro for Rust custom data types. Python custom types use the registry encoder registered by register_custom_data_class instead.

Required Methods

fn schema(&self) -> Result<Schema>

Returns the Arrow schema for this custom data type.

Errors

Returns an error if schema construction fails.

fn encode_record_batch( &self, items: &[Arc<dyn CustomDataTrait>], ) -> Result<RecordBatch>

Encodes a batch of custom data items to an Arrow RecordBatch.

Errors

Returns an error if encoding fails (e.g. type mismatch or Arrow error).

Implementors