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PlanChoiceReason

icydb_core::metrics

Enum PlanChoiceReason

pub enum PlanChoiceReason {
Show 14 variants    ConflictingPrimaryKeyChildrenAccessPreferred,
    ConstantFalsePredicate,
    EmptyChildAccessPreferred,
    FullScanAccess,
    IntentKeyAccessOverride,
    LimitZeroWindow,
    NonIndexAccess,
    PlannerCompositeNonIndex,
    PlannerFullScanFallback,
    PlannerKeySetAccess,
    PlannerPrimaryKeyLookup,
    PlannerPrimaryKeyRange,
    RequiredOrderPrimaryKeyRangePreferred,
    SingletonPrimaryKeyChildAccessPreferred,
}

Expand description

PlanChoiceReason

Stable selected-route reason buckets for non-index and primary-key access choices. These counters explain why a query did not land on a secondary index route without exposing predicates, literals, or index names.

Variants§

ConflictingPrimaryKeyChildrenAccessPreferred

ConstantFalsePredicate

EmptyChildAccessPreferred

FullScanAccess

IntentKeyAccessOverride

LimitZeroWindow

NonIndexAccess

PlannerCompositeNonIndex

PlannerFullScanFallback

PlannerKeySetAccess

PlannerPrimaryKeyLookup

PlannerPrimaryKeyRange

RequiredOrderPrimaryKeyRangePreferred

SingletonPrimaryKeyChildAccessPreferred

Trait Implementations§

impl Clone for PlanChoiceReason

fn clone(&self) -> PlanChoiceReason

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 Copy for PlanChoiceReason

impl Debug for PlanChoiceReason

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

Formats the value using the given formatter. Read more

impl Eq for PlanChoiceReason

impl PartialEq for PlanChoiceReason

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 (const: unstable) · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PlanChoiceReason

Auto Trait Implementations§

impl Freeze for PlanChoiceReason

impl RefUnwindSafe for PlanChoiceReason

impl Send for PlanChoiceReason

impl Sync for PlanChoiceReason

impl Unpin for PlanChoiceReason

impl UnsafeUnpin for PlanChoiceReason

impl UnwindSafe for PlanChoiceReason

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