Struct datafusion_expr::logical_plan::builder::LogicalTableSource

pub struct LogicalTableSource { /* private fields */ }

Basic TableSource implementation intended for use in tests and documentation. It is expected that users will provide their own TableSource implementations or use DataFusion’s DefaultTableSource.

Implementations

impl LogicalTableSource

pub fn new(table_schema: SchemaRef) -> Self

Create a new LogicalTableSource

Trait Implementations

impl TableSource for LogicalTableSource

fn as_any(&self) -> &dyn Any

fn schema(&self) -> SchemaRef

Get a reference to the schema for this table

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

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

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

Get primary key indices, if one exists.

fn table_type(&self) -> TableType

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

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

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

Get the Logical plan of this table provider, if available.

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

Get the default value for a column, if available.