pub struct EliminateNestedUnion;
Expand description
An optimization rule that replaces nested unions with a single union.
Implementations§
source§impl EliminateNestedUnion
impl EliminateNestedUnion
pub fn new() -> EliminateNestedUnion
Trait Implementations§
source§impl Default for EliminateNestedUnion
impl Default for EliminateNestedUnion
source§fn default() -> EliminateNestedUnion
fn default() -> EliminateNestedUnion
Returns the “default value” for a type. Read more
source§impl OptimizerRule for EliminateNestedUnion
impl OptimizerRule for EliminateNestedUnion
source§fn try_optimize(
&self,
plan: &LogicalPlan,
_config: &dyn OptimizerConfig
) -> Result<Option<LogicalPlan>, DataFusionError>
fn try_optimize( &self, plan: &LogicalPlan, _config: &dyn OptimizerConfig ) -> Result<Option<LogicalPlan>, DataFusionError>
Try and rewrite
plan
to an optimized form, returning None if the plan cannot be
optimized by this rule.source§fn apply_order(&self) -> Option<ApplyOrder>
fn apply_order(&self) -> Option<ApplyOrder>
How should the rule be applied by the optimizer? See comments on
ApplyOrder
for details. Read moreAuto Trait Implementations§
impl Freeze for EliminateNestedUnion
impl RefUnwindSafe for EliminateNestedUnion
impl Send for EliminateNestedUnion
impl Sync for EliminateNestedUnion
impl Unpin for EliminateNestedUnion
impl UnwindSafe for EliminateNestedUnion
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreCreates a shared type from an unshared type.