Trait ArrowExportVTable 

pub trait ArrowExportVTable:
    'static
    + Send
    + Sync
    + Debug {
    // Required methods
    fn arrow_ext_id(&self) -> Id;
    fn vortex_id(&self) -> Id;
    fn to_arrow_field(
        &self,
        name: &str,
        dtype: &DType,
        session: &ArrowSession,
    ) -> VortexResult<Option<Field>>;
    fn execute_arrow(
        &self,
        array: ArrayRef,
        target: &Field,
        options: &ArrowExportOptions,
        ctx: &mut ExecutionCtx,
    ) -> VortexResult<ArrowExport>;
}

Plugin layer for exporting a Vortex array to an Arrow extension type.

This is purely an implementation trait, its methods should not be called directly. Instead, use the methods on ArrowSession.

Required Methods

fn arrow_ext_id(&self) -> Id

The Arrow extension ID this plugin produces.

fn vortex_id(&self) -> Id

The Vortex array or extension ID this plugin maps from. Used only for inference by ArrowSession::to_arrow_field / ArrowSession::to_arrow_schema; never as a dispatch key for execute_arrow.

fn to_arrow_field( &self, name: &str, dtype: &DType, session: &ArrowSession, ) -> VortexResult<Option<Field>>

Build the Arrow Field this plugin produces for the given Vortex extension dtype. Used during schema inference.

fn execute_arrow( &self, array: ArrayRef, target: &Field, options: &ArrowExportOptions, ctx: &mut ExecutionCtx, ) -> VortexResult<ArrowExport>

Convert a Vortex array into an Arrow array shaped to target.

Returns ownership of array via ArrowExport::Unsupported when the plugin cannot handle the input. Plugins that export child or storage arrays must pass options on to those exports.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors