Enum mz_sql::query_model::model::graph::DistinctOperation

pub enum DistinctOperation {
    Enforce,
    Guaranteed,
    Preserve,
}

Enum that describes the DISTINCT property of a QueryBox.

Variants

Enforce

Distinctness of the output of the box must be enforced by the box.

Guaranteed

Distinctness of the output of the box is required, but guaranteed by the structure of the box.

Preserve

Distinctness of the output of the box is not required.

Trait Implementations

impl Debug for DistinctOperation

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

Formats the value using the given formatter.

impl Hash for DistinctOperation

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<DistinctOperation> for DistinctOperation

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for DistinctOperation

impl StructuralEq for DistinctOperation

impl StructuralPartialEq for DistinctOperation