pub struct DefaultTableSource {
    pub table_provider: Arc<dyn TableProvider>,
}
Expand description

DataFusion default table source, wrapping TableProvider.

This structure adapts a TableProvider (physical plan trait) to the TableSource (logical plan trait) and is necessary because the logical plan is contained in the datafusion_expr crate, and is not aware of table providers, which exist in the core datafusion crate.

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§table_provider: Arc<dyn TableProvider>

table provider

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impl DefaultTableSource

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pub fn new(table_provider: Arc<dyn TableProvider>) -> Self

Create a new DefaultTableSource to wrap a TableProvider

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impl TableSource for DefaultTableSource

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fn as_any(&self) -> &dyn Any

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

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fn schema(&self) -> SchemaRef

Get a reference to the schema for this table

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

Get a reference to applicable constraints, if any exists.

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

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

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

Get the Logical plan of this table provider, if available.
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fn get_column_default(&self, column: &str) -> Option<&Expr>

Get the default value for a column, if available.
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fn table_type(&self) -> TableType

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

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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