Trait ArrowExportVTable 

pub trait ArrowExportVTable:
    'static
    + Send
    + Sync
    + Debug {
    // Required methods
    fn arrow_ext_id(&self) -> Id;
    fn vortex_ext_id(&self) -> ExtId;
    fn to_arrow_field(
        &self,
        name: &str,
        dtype: &ExtDTypeRef,
        session: &ArrowSession,
    ) -> VortexResult<Option<Field>>;
    fn execute_arrow(
        &self,
        array: ArrayRef,
        target: &Field,
        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_ext_id(&self) -> ExtId

The Vortex 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: &ExtDTypeRef, 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, 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.

Implementors

impl ArrowExportVTable for Uuid