Enum AssignmentTargets 

pub enum AssignmentTargets<E = Expr> {
    Single(AssignmentTarget<E>),
    Multiple(MultipleAssignmentTargets<E>),
}

The targets of one SET item. A multiple target consumes one positional subquery result. Single targets retain the predecessor’s string or indirection-object encoding.

Variants

Single(AssignmentTarget<E>)

Multiple(MultipleAssignmentTargets<E>)

Implementations

impl<E> AssignmentTargets<E>

pub fn targets(&self) -> &[AssignmentTarget<E>]

pub fn targets_mut(&mut self) -> &mut [AssignmentTarget<E>]

pub fn source_position(&self, target: usize) -> usize

pub fn column_names(&self) -> impl Iterator<Item = &str>

pub fn expressions(&self) -> impl Iterator<Item = &E>

pub fn expressions_mut(&mut self) -> impl Iterator<Item = &mut E>

pub fn map<T>(self, map: impl FnMut(E) -> T) -> AssignmentTargets<T>

Trait Implementations

impl<E: Clone> Clone for AssignmentTargets<E>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E: Debug> Debug for AssignmentTargets<E>

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

Formats the value using the given formatter.

impl<'de, E> Deserialize<'de> for AssignmentTargets<E>

where E: Deserialize<'de>,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<E> From<&str> for AssignmentTargets<E>

fn from(column: &str) -> Self

Converts to this type from the input type.

impl<E> From<AssignmentTarget<E>> for AssignmentTargets<E>

fn from(target: AssignmentTarget<E>) -> Self

Converts to this type from the input type.

impl<E> From<String> for AssignmentTargets<E>

fn from(column: String) -> Self

Converts to this type from the input type.

impl<E: PartialEq> PartialEq for AssignmentTargets<E>

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

Equality operator ==.

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

Inequality operator !=.

impl<E> Serialize for AssignmentTargets<E>

where E: Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<E: PartialEq> StructuralPartialEq for AssignmentTargets<E>