Struct EllaTopic

pub struct EllaTopic { /* private fields */ }

Implementations

impl EllaTopic

pub fn publish(&self) -> Publisher

pub fn table(&self) -> &TableId<'static>

pub fn config(&self) -> &TableConfig

pub fn path(&self) -> &Path

pub fn temporary(&self) -> bool

pub async fn close(&self) -> Result<(), Error>

pub fn info(&self) -> &TopicInfo

Trait Implementations

impl Debug for EllaTopic

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

Formats the value using the given formatter.

impl TableProvider for EllaTopic

fn as_any(&self) -> &(dyn Any + 'static)

Returns the table provider as Any so that it can be downcast to a specific implementation.

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

Get a reference to the schema for this table

fn table_type(&self) -> TableType

Get the type of this table for metadata/catalog purposes.

fn supports_filters_pushdown( &self, filters: &[&Expr], ) -> Result<Vec<TableProviderFilterPushDown>, DataFusionError>

Tests whether the table provider can make use of any or all filter expressions to optimise data retrieval.

fn scan<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, state: &'life1 SessionState, projection: Option<&'life2 Vec<usize>>, filters: &'life3 [Expr], limit: Option<usize>, ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn ExecutionPlan>, DataFusionError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, EllaTopic: 'async_trait,

Create an ExecutionPlan that will scan the table. The table provider will be usually responsible of grouping the source data into partitions that can be efficiently parallelized or distributed.

fn insert_into<'life0, 'life1, 'async_trait>( &'life0 self, _state: &'life1 SessionState, input: Arc<dyn ExecutionPlan>, ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn ExecutionPlan>, DataFusionError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, EllaTopic: 'async_trait,

Return an ExecutionPlan to insert data into this table, if supported.

fn get_table_definition(&self) -> Option<&str>

Get the create statement used to create this table, if available.

fn get_logical_plan(&self) -> Option<&LogicalPlan>

Get the Logical Plan of this table, if available.

fn supports_filter_pushdown( &self, _filter: &Expr, ) -> Result<TableProviderFilterPushDown, DataFusionError>

👎Deprecated since 20.0.0: use supports_filters_pushdown instead

Tests whether the table provider can make use of a filter expression to optimise data retrieval.

fn statistics(&self) -> Option<Statistics>

Get statistics for this table, if available