Struct DataframeQueryTableProvider 

pub struct DataframeQueryTableProvider<T: DataframeClientAPI> {
    pub schema: SchemaRef,
    /* private fields */
}

Fields

schema: SchemaRef

Implementations

impl DataframeQueryTableProvider<ConnectionClient>

pub async fn new( origin: Origin, connection: ConnectionRegistryHandle, dataset_id: EntryId, query_expression: &QueryExpression, segment_ids: &[impl AsRef<str> + Sync], index_values: Option<Arc<BTreeMap<String, BTreeSet<IndexValue>>>>, trace_headers: Option<TraceHeaders>, ) -> Result<Self, DataFusionError>

Create a table provider for a gRPC query. This function is async because we need to make gRPC calls to determine the schema at the creation of the table provider.

impl<T: DataframeClientAPI> DataframeQueryTableProvider<T>

pub async fn new_from_client( client: T, dataset_id: EntryId, query_expression: &QueryExpression, segment_ids: &[impl AsRef<str> + Sync], index_values: Option<Arc<BTreeMap<String, BTreeSet<IndexValue>>>>, trace_headers: Option<TraceHeaders>, ) -> Result<Self, DataFusionError>

Trait Implementations

impl<T: Debug + DataframeClientAPI> Debug for DataframeQueryTableProvider<T>

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

Formats the value using the given formatter.

impl<T: DataframeClientAPI> TableProvider for DataframeQueryTableProvider<T>

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 dyn Session, 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<Cow<'_, 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 Although not presently used in mainline DataFusion, this allows implementation specific behavior for downstream repositories, in conjunction with specialized optimizer rules to perform operations such as re-ordering of joins.

fn insert_into<'life0, 'life1, 'async_trait>( &'life0 self, _state: &'life1 dyn Session, _input: Arc<dyn ExecutionPlan>, _insert_op: InsertOp, ) -> 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.