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LookupColumnPruningRule

laminar_sql::planner::lookup_join

Struct LookupColumnPruningRule

pub struct LookupColumnPruningRule;

Expand description

Column pruning rule for LookupJoinNode.

Narrows required_lookup_columns to only the columns referenced by downstream plan nodes.

Trait Implementations§

impl Debug for LookupColumnPruningRule

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

Formats the value using the given formatter. Read more

impl OptimizerRule for LookupColumnPruningRule

fn name(&self) -> &'static str

A human readable name for this optimizer rule

fn apply_order(&self) -> Option<ApplyOrder>

How should the rule be applied by the optimizer? See comments on ApplyOrder for details. Read more

fn rewrite( &self, plan: LogicalPlan, _config: &dyn OptimizerConfig, ) -> Result<Transformed<LogicalPlan>>

Try to rewrite plan to an optimized form, returning Transformed::yes if the plan was rewritten and Transformed::no if it was not.

fn supports_rewrite(&self) -> bool

👎Deprecated since 47.0.0:

This method is no longer used

Does this rule support rewriting owned plans (rather than by reference)?

Auto Trait Implementations§

impl Freeze for LookupColumnPruningRule

impl RefUnwindSafe for LookupColumnPruningRule

impl Send for LookupColumnPruningRule

impl Sync for LookupColumnPruningRule

impl Unpin for LookupColumnPruningRule

impl UnsafeUnpin for LookupColumnPruningRule

impl UnwindSafe for LookupColumnPruningRule

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

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impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into<U> for T
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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 more

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where F: FnOnce(&Self) -> bool,

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 more

impl<T> LayoutRaw for T

fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

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impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

Returns whether the given value has been niched. Read more

fn resolve_niched(out: Place<NichedOption<T, N1>>)

Writes data to out indicating that a T is niched.

impl<T> Pointee for T

type Metadata = ()

The metadata type for pointers and references to this type.

impl<T> Same for T

type Output = T

Should always be Self

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Scoped with reference.

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type Error = Infallible

The type returned in the event of a conversion error.

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Performs the conversion.

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type Error = <U as TryFrom<T>>::Error

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