datafusion_python::datafusion_expr

Struct LogicalTableSource

pub struct LogicalTableSource { /* private fields */ }

Expand description

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: Arc<Schema>) -> LogicalTableSource

Create a new LogicalTableSource

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

Trait Implementations§

impl TableSource for LogicalTableSource

fn as_any(&self) -> &(dyn Any + 'static)

fn schema(&self) -> Arc<Schema>

Get a reference to the schema for this table

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

Get primary key indices, if any

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.

fn table_type(&self) -> TableType

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

fn get_logical_plan(&self) -> Option<Cow<'_, LogicalPlan>>

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

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

Get the default value for a column, if available.

Auto Trait Implementations§

impl Freeze for LogicalTableSource

impl RefUnwindSafe for LogicalTableSource

impl Send for LogicalTableSource

impl Sync for LogicalTableSource

impl Unpin for LogicalTableSource

impl UnwindSafe for LogicalTableSource

Blanket Implementations§

impl<T> AlignerFor<1> for T

type Aligner = AlignTo1<T>

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impl<T> AlignerFor<1024> for T

type Aligner = AlignTo1024<T>

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impl<T> AlignerFor<128> for T

type Aligner = AlignTo128<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<16> for T

type Aligner = AlignTo16<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<16384> for T

type Aligner = AlignTo16384<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<2> for T

type Aligner = AlignTo2<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<2048> for T

type Aligner = AlignTo2048<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<256> for T

type Aligner = AlignTo256<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<32> for T

type Aligner = AlignTo32<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<32768> for T

type Aligner = AlignTo32768<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<4> for T

type Aligner = AlignTo4<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<4096> for T

type Aligner = AlignTo4096<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<512> for T

type Aligner = AlignTo512<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<64> for T

type Aligner = AlignTo64<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<8> for T

type Aligner = AlignTo8<T>

The AlignTo* type which aligns Self to ALIGNMENT.

impl<T> AlignerFor<8192> for T

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fn f_get_mut<F>(&mut self, offset: FieldOffset<S, F, Aligned>) -> &mut F

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impl<S> ROExtOps<Aligned> for S

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Replaces a field (determined by offset) with value, returning the previous value of the field. Read more

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Swaps a field (determined by offset) with the same field in right. Read more

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where F: Copy,

Gets a copy of a field (determined by offset). The field is determined by offset. Read more

impl<S> ROExtOps<Unaligned> for S

fn f_replace<F>(&mut self, offset: FieldOffset<S, F, Unaligned>, value: F) -> F

Replaces a field (determined by offset) with value, returning the previous value of the field. Read more

fn f_swap<F>(&mut self, offset: FieldOffset<S, F, Unaligned>, right: &mut S)

Swaps a field (determined by offset) with the same field in right. Read more

fn f_get_copy<F>(&self, offset: FieldOffset<S, F, Unaligned>) -> F
where F: Copy,

Gets a copy of a field (determined by offset). The field is determined by offset. Read more

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