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ExplainAccessDecision

Struct ExplainAccessDecision

pub struct ExplainAccessDecision {
    pub selected: ExplainSelectedAccess,
    pub candidates: Vec<ExplainAccessCandidate>,
    pub alternatives: Vec<ExplainEligibleAlternative>,
    pub rejections: Vec<ExplainRejectedIndex>,
    pub residual: ExplainResidualSummary,
}

Expand description

Stable JSON-facing access-decision projection for logical EXPLAIN.

This DTO is derived from the planner-owned access-choice snapshot and the selected explain access path. It is not an optimizer model and does not participate in access selection.

Fields§

§selected: ExplainSelectedAccess

Selected access path summary.

§candidates: Vec<ExplainAccessCandidate>

Planner candidate summaries recorded for the selected access family.

§alternatives: Vec<ExplainEligibleAlternative>

Eligible alternatives not selected by the planner.

§rejections: Vec<ExplainRejectedIndex>

Rejected index candidates and planner-owned reason strings.

§residual: ExplainResidualSummary

Residual-work summary for the selected route when available.

Trait Implementations§

impl Clone for ExplainAccessDecision

fn clone(&self) -> ExplainAccessDecision

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Debug for ExplainAccessDecision

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

Formats the value using the given formatter. Read more

impl Eq for ExplainAccessDecision

impl PartialEq for ExplainAccessDecision

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl StructuralPartialEq for ExplainAccessDecision

Auto Trait Implementations§

impl Freeze for ExplainAccessDecision

impl RefUnwindSafe for ExplainAccessDecision

impl Send for ExplainAccessDecision

impl Sync for ExplainAccessDecision

impl Unpin for ExplainAccessDecision

impl UnsafeUnpin for ExplainAccessDecision

impl UnwindSafe for ExplainAccessDecision

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> 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
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

impl<T> Same for T

type Output = T

Should always be Self

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V