Enum datafusion_expr::TableProviderFilterPushDown

pub enum TableProviderFilterPushDown {
    Unsupported,
    Inexact,
    Exact,
}

Indicates whether and how a filter expression can be handled by a TableProvider for table scans.

Variants

Unsupported

The expression cannot be used by the provider.

Inexact

The expression can be used to help minimise the data retrieved, but the provider cannot guarantee that all returned tuples satisfy the filter. The Filter plan node containing this expression will be preserved.

Exact

The provider guarantees that all returned data satisfies this filter expression. The Filter plan node containing this expression will be removed.

Trait Implementations

impl Clone for TableProviderFilterPushDown

fn clone(&self) -> TableProviderFilterPushDown

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TableProviderFilterPushDown

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

Formats the value using the given formatter.

impl PartialEq<TableProviderFilterPushDown> for TableProviderFilterPushDown

fn eq(&self, other: &TableProviderFilterPushDown) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for TableProviderFilterPushDown

impl StructuralEq for TableProviderFilterPushDown

impl StructuralPartialEq for TableProviderFilterPushDown