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ReferenceTableSource

laminar_connectors::reference

Trait ReferenceTableSource 

Source 
pub trait ReferenceTableSource: Send {
    // Required methods
    fn poll_snapshot<'life0, 'async_trait>(
        &'life0 mut self,
    ) -> Pin<Box<dyn Future<Output = Result<Option<RecordBatch>, ConnectorError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn close<'life0, 'async_trait>(
        &'life0 mut self,
    ) -> Pin<Box<dyn Future<Output = Result<(), ConnectorError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided method
    fn resolve_schema<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        config: &'life1 ConnectorConfig,
        explicit: Option<SchemaRef>,
    ) -> Pin<Box<dyn Future<Output = Result<SchemaBinding, ConnectorError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
}
Expand description

A finite source used to hydrate a reference table before processing starts.

Required Methods§

Source

fn poll_snapshot<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<Option<RecordBatch>, ConnectorError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Returns the next snapshot batch, or None after the complete snapshot was delivered.

Source

fn close<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<(), ConnectorError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Releases source resources.

Provided Methods§

Source

fn resolve_schema<'life0, 'life1, 'async_trait>( &'life0 mut self, config: &'life1 ConnectorConfig, explicit: Option<SchemaRef>, ) -> Pin<Box<dyn Future<Output = Result<SchemaBinding, ConnectorError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Resolve a snapshot reader before hydration, without consuming snapshot rows.

§Errors

The default extension contract requires explicit fields. Metadata-capable implementations override this hook and retain native identity at hydration.

Dyn Compatibility§

This trait is dyn compatible.

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

Implementors§