Struct DummyTableProvider

pub struct DummyTableProvider {
    region_id: RegionId,
    engine: RegionEngineRef,
    metadata: RegionMetadataRef,
    scan_request: Arc<Mutex<ScanRequest>>,
}

For [TableProvider] and DummyCatalogList

Fields

region_id: RegionId

engine: RegionEngineRef

metadata: RegionMetadataRef

scan_request: Arc<Mutex<ScanRequest>>

Keeping a mutable request makes it possible to change in the optimize phase.

Implementations

impl DummyTableProvider

pub fn new( region_id: RegionId, engine: RegionEngineRef, metadata: RegionMetadataRef, ) -> Self

Creates a new provider.

pub fn region_metadata(&self) -> RegionMetadataRef

pub fn with_ordering_hint(&self, order_opts: &[OrderOption])

Sets the ordering hint of the query to the provider.

pub fn with_time_series_selector_hint(&self, selector: TimeSeriesRowSelector)

Sets the time series selector hint of the query to the provider.

Trait Implementations

impl Clone for DummyTableProvider

fn clone(&self) -> DummyTableProvider

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl TableProvider for DummyTableProvider

fn as_any(&self) -> &dyn Any

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

fn schema(&self) -> SchemaRef

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 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>>> + Send + 'async_trait>>

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

Create an [ExecutionPlan] for scanning the table with optionally specified projection, filter and limit, described below.

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

Specify if DataFusion should provide filter expressions to the TableProvider to apply during the scan.

fn constraints(&self) -> Option<&Constraints>

Get a reference to the constraints of the table. Returns:

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 [LogicalPlan] of this table, if available

fn get_column_default(&self, _column: &str) -> Option<&Expr>

Get the default value for a column, if available.

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

Get statistics for this table, if available

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

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

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