Enum JoinOutputSource 

pub enum JoinOutputSource {
    Input(usize),
    Cast {
        input: usize,
        ty: ColumnType,
    },
    Coalesce {
        left: usize,
        right: usize,
        ty: ColumnType,
    },
}

Source of one visible or hidden join-output identity.

Variants

Input(usize)

Reuse an existing logical input position without copying its value.

Cast

Apply an implicit binder-selected coercion to one input position.

Fields

input: usize

ty: ColumnType

Coalesce

SQL COALESCE(left::type, right::type) over two logical input positions. This is required only for a merged column of FULL JOIN.

Fields

left: usize

right: usize

ty: ColumnType

Trait Implementations

impl Clone for JoinOutputSource

fn clone(&self) -> JoinOutputSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinOutputSource

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

Formats the value using the given formatter.

impl Eq for JoinOutputSource

impl PartialEq for JoinOutputSource

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for JoinOutputSource