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ExecutionStep

cqlite_core::query::select_optimizer

Enum ExecutionStep

pub enum ExecutionStep {
    SSTableScan {
        table: TableId,
        predicates: Vec<SSTablePredicate>,
        projection: Vec<String>,
    },
    Filter {
        expression: WhereExpression,
    },
    Sort {
        order_by: OrderByClause,
    },
    Aggregate {
        plan: AggregationPlan,
    },
    Limit {
        count: u64,
        offset: Option<u64>,
    },
    Project {
        columns: Vec<SelectExpression>,
    },
}

Expand description

Individual execution step

Variants§

SSTableScan

Fields

§table: TableId

§predicates: Vec<SSTablePredicate>

§projection: Vec<String>

Filter

Fields

§expression: WhereExpression

Sort

Fields

§order_by: OrderByClause

Aggregate

Fields

§plan: AggregationPlan

Limit

Fields

§count: u64

§offset: Option<u64>

Project

Fields

§columns: Vec<SelectExpression>

Trait Implementations§

impl Clone for ExecutionStep

fn clone(&self) -> ExecutionStep

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 ExecutionStep

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for ExecutionStep

impl RefUnwindSafe for ExecutionStep

impl Send for ExecutionStep

impl Sync for ExecutionStep

impl Unpin for ExecutionStep

impl UnsafeUnpin for ExecutionStep

impl UnwindSafe for ExecutionStep

Blanket Implementations§

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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

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.