pub enum TableProviderFilterPushDown {
Unsupported,
Inexact,
Exact,
}
Expand description
! Table source 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
sourceimpl Clone for TableProviderFilterPushDown
impl Clone for TableProviderFilterPushDown
sourcefn clone(&self) -> TableProviderFilterPushDown
fn clone(&self) -> TableProviderFilterPushDown
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for TableProviderFilterPushDown
impl Debug for TableProviderFilterPushDown
sourceimpl PartialEq<TableProviderFilterPushDown> for TableProviderFilterPushDown
impl PartialEq<TableProviderFilterPushDown> for TableProviderFilterPushDown
sourcefn eq(&self, other: &TableProviderFilterPushDown) -> bool
fn eq(&self, other: &TableProviderFilterPushDown) -> bool
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
impl Eq for TableProviderFilterPushDown
impl StructuralEq for TableProviderFilterPushDown
impl StructuralPartialEq for TableProviderFilterPushDown
Auto Trait Implementations
impl RefUnwindSafe for TableProviderFilterPushDown
impl Send for TableProviderFilterPushDown
impl Sync for TableProviderFilterPushDown
impl Unpin for TableProviderFilterPushDown
impl UnwindSafe for TableProviderFilterPushDown
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
sourcefn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to key
and return true
if they are equal.