Enum RuleId 

pub enum RuleId {
    R0a,
    R0b,
    R1,
    R2,
    R3,
    R4,
    R5,
    R6,
    R7,
    R8,
    R9,
    R10,
}

Identifier for each R-rule in the optimizer catalog (§10.2 + §10.10.3).

Variants

R0a

Identity elimination: a singleton combinator or a trivial filter is dropped.

R0b

Associativity flattening: nested unions or cartesians of one kind become one n-ary node.

R1

order(Lex) is a counter wrapper: it becomes a truncated lexicographic walk.

R2

Push-down of a truncated order to an index-addressable child’s closed form.

R3

An untruncated lexicographic order commutes with a filter.

R4

A filter distributes over a union.

R5

A per-axis filter pushes down into a cartesian’s axes.

R6

A chain of filters folds into one.

R7

A chain of orders folds into one when the inner is untruncated.

R8

Range narrowing from a bounded predicate (deferred).

R9

Discrete-set substitution from an in predicate (deferred).

R10

Monotonic-cutoff truncation (deferred).

Trait Implementations

impl Clone for RuleId

fn clone(&self) -> RuleId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RuleId

impl Debug for RuleId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RuleId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for RuleId

impl Hash for RuleId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for RuleId

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for RuleId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for RuleId