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OptimizationRule

polyglot_sql::optimizer::optimizer

Enum OptimizationRule

pub enum OptimizationRule {
Show 14 variants    Qualify,
    PushdownProjections,
    Normalize,
    UnnestSubqueries,
    PushdownPredicates,
    OptimizeJoins,
    EliminateSubqueries,
    MergeSubqueries,
    EliminateJoins,
    EliminateCtes,
    QuoteIdentifiers,
    AnnotateTypes,
    Canonicalize,
    Simplify,
}

Expand description

Optimization rule type

Variants§

Qualify

Qualify columns and tables with their full names

PushdownProjections

Push projections down to eliminate unused columns early

Normalize

Normalize boolean expressions

UnnestSubqueries

Unnest correlated subqueries into joins

PushdownPredicates

Push predicates down to filter data early

OptimizeJoins

Optimize join order and remove cross joins

EliminateSubqueries

Eliminate derived tables by converting to CTEs

MergeSubqueries

Merge subqueries into outer queries

EliminateJoins

Eliminate unused joins after join optimization and subquery merges

EliminateCtes

Remove unused CTEs

QuoteIdentifiers

Quote identifiers that require quoting for the target dialect

AnnotateTypes

Annotate expressions with type information

Canonicalize

Convert expressions to canonical form

Simplify

Simplify expressions

Trait Implementations§

impl Clone for OptimizationRule

fn clone(&self) -> OptimizationRule

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 OptimizationRule

impl Debug for OptimizationRule

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

Formats the value using the given formatter. Read more

impl Eq for OptimizationRule

impl PartialEq for OptimizationRule

fn eq(&self, other: &OptimizationRule) -> 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 OptimizationRule

Auto Trait Implementations§

impl Freeze for OptimizationRule

impl RefUnwindSafe for OptimizationRule

impl Send for OptimizationRule

impl Sync for OptimizationRule

impl Unpin for OptimizationRule

impl UnsafeUnpin for OptimizationRule

impl UnwindSafe for OptimizationRule

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<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> 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.