Enum CompareOp 

pub enum CompareOp {
    Equal,
    NotEqual,
    Less,
    LessOrEqual,
    Greater,
    GreaterOrEqual,
    DistinctFrom,
    NotDistinctFrom,
}

Which comparison a Expr::Compare performs.

Variants

Equal

=, null in either operand yields null.

NotEqual

<>.

Less

<.

LessOrEqual

<=.

Greater

>.

GreaterOrEqual

>=.

DistinctFrom

IS DISTINCT FROM, which is total: two nulls are not distinct.

NotDistinctFrom

IS NOT DISTINCT FROM, the null-safe equality.

Implementations

impl CompareOp

pub fn symbol(self) -> &'static str

The spelling used in the textual form.

pub fn flip(self) -> Self

The comparison that holds exactly when this one does with the operands swapped.

Used by comparison normalization, which wants the constant on one fixed side.

Trait Implementations

impl Clone for CompareOp

fn clone(&self) -> CompareOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompareOp

impl Debug for CompareOp

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

Formats the value using the given formatter.

impl Eq for CompareOp

impl Hash for CompareOp

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 CompareOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CompareOp