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LogicalTableSource

datafusion_python::datafusion_expr::logical_plan::builder

Struct LogicalTableSource 

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pub struct LogicalTableSource { /* private fields */ }
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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.

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impl LogicalTableSource

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pub fn new(table_schema: Arc<Schema>) -> LogicalTableSource

Create a new LogicalTableSource

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pub fn with_constraints(self, constraints: Constraints) -> LogicalTableSource

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impl TableSource for LogicalTableSource

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fn schema(&self) -> Arc<Schema> ⓘ

Get a reference to the schema for this table
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fn constraints(&self) -> Option<&Constraints>

Get primary key indices, if any
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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 optimize data retrieval. Only non-volatile expressions are passed to this function.
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fn table_type(&self) -> TableType

Get the type of this table for metadata/catalog purposes.
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fn get_logical_plan(&self) -> Option<Cow<'_, LogicalPlan>>

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