Enum mz_expr::interpret::Values

enum Values<'a> {
    Empty,
    Within(Datum<'a>, Datum<'a>),
    Nested(BTreeMap<Datum<'a>, ResultSpec<'a>>),
    All,
}

An inclusive range of non-null datum values.

Variants

Empty

This range contains no values.

Within(Datum<'a>, Datum<'a>)

An inclusive range. Invariant: the first element is always <= the second.

Nested(BTreeMap<Datum<'a>, ResultSpec<'a>>)

Constraints on structured fields, useful for recursive structures like maps. Fields that are not present in the map default to Values::All.

All

This range might contain any value. Since we’re overapproximating, this is often used as a “safe fallback” when we can’t determine the right boundaries for a range.

Implementations

impl<'a> Values<'a>

fn just(a: Datum<'a>) -> Values<'a>

fn union(self, other: Values<'a>) -> Values<'a>

fn intersect(self, other: Values<'a>) -> Values<'a>

fn may_contain(&self, value: Datum<'a>) -> bool

Trait Implementations

impl<'a> Clone for Values<'a>

fn clone(&self) -> Values<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Values<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Values<'a>

fn eq(&self, other: &Values<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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<'a> Eq for Values<'a>

impl<'a> StructuralPartialEq for Values<'a>