Struct Interval 

pub struct Interval {
    pub value: Box<Expr>,
    pub leading_field: Option<DateTimeField>,
    pub leading_precision: Option<u64>,
    pub last_field: Option<DateTimeField>,
    pub fractional_seconds_precision: Option<u64>,
}

Represents an INTERVAL expression, roughly in the following format: INTERVAL '<value>' [ <leading_field> [ (<leading_precision>) ] ] [ TO <last_field> [ (<fractional_seconds_precision>) ] ], e.g. INTERVAL '123:45.67' MINUTE(3) TO SECOND(2).

The parser does not validate the <value>, nor does it ensure that the <leading_field> units >= the units in <last_field>, so the user will have to reject intervals like HOUR TO YEAR.

Fields

value: Box<Expr>

The interval value expression (commonly a string literal).

leading_field: Option<DateTimeField>

Optional leading time unit (e.g., HOUR, MINUTE).

leading_precision: Option<u64>

Optional leading precision for the leading field.

last_field: Option<DateTimeField>

Optional trailing time unit for a range (e.g., SECOND).

fractional_seconds_precision: Option<u64>

The fractional seconds precision, when specified.

See SQL SECOND(n) or SECOND(m, n) forms.

Trait Implementations

impl Clone for Interval

fn clone(&self) -> Interval

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Interval

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

Formats the value using the given formatter.

impl Display for Interval

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

Formats the value using the given formatter.

impl Eq for Interval

impl Hash for Interval

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

where __H: Hasher,

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 Ord for Interval

fn cmp(&self, other: &Interval) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Interval

fn eq(&self, other: &Interval) -> 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 PartialOrd for Interval

fn partial_cmp(&self, other: &Interval) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Interval

impl Visit for Interval

fn visit<V>(&self, visitor: &mut V) -> ControlFlow<<V as Visitor>::Break>

where V: Visitor,

Visit this node with the provided Visitor.

impl VisitMut for Interval

fn visit<V>(&mut self, visitor: &mut V) -> ControlFlow<<V as VisitorMut>::Break>

where V: VisitorMut,

Mutably visit this node with the provided VisitorMut.