Skip to main content

ProjectionPruning

oxisql_parse::optimizer

Struct ProjectionPruning 

Source 
pub struct ProjectionPruning {
    pub required: Vec<String>,
}
Expand description

Prune Project column lists to only those columns required by the parent.

When required is empty, this pass is a no-op (all columns are kept).

Fields§

§required: Vec<String>

Column names (bare names, not qualified) needed by the consumer of this plan. An empty list means “all columns required” (no pruning).

Trait Implementations§

Source§

impl OptPass for ProjectionPruning

Source§

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

Short name identifying this pass (for tracing / debugging).
Source§

fn apply(&self, plan: LogicalPlan) -> LogicalPlan

Apply the rewrite to plan, returning the (possibly modified) plan.

Auto Trait Implementations§

Blanket Implementations§

Source§

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

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

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

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

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

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = !

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, !>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

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

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.