Struct JoinKey 

pub struct JoinKey {
    pub left_field: Expr,
    pub right_field: Expr,
}

Correlation-key extraction for a join. Each side names the expression that produces the join key; the executor hash-keys on the resulting value.

Fields

left_field: Expr

Expression evaluated against the left-side row to produce the join key.

right_field: Expr

Expression evaluated against the right-side row.

Trait Implementations

impl Clone for JoinKey

fn clone(&self) -> JoinKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinKey

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for JoinKey

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for JoinKey

fn eq(&self, other: &JoinKey) -> 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 Serialize for JoinKey

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for JoinKey