Struct OptionalMatch 

pub struct OptionalMatch {
    pub input: PlanNodeId,
    pub inner: PlanNodeId,
    pub new_vars: Vec<VarId>,
}

Left-outer-join style node: runs the inner sub-plan for each input row. If no rows are produced, emits one row with nulls for the new variables.

Fields

input: PlanNodeId

Upstream rows that feed the optional match.

inner: PlanNodeId

The root of the inner sub-plan that implements the pattern + filter.

new_vars: Vec<VarId>

Variables introduced by the optional match (need null-extension).

Trait Implementations

impl Clone for OptionalMatch

fn clone(&self) -> OptionalMatch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptionalMatch

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

Formats the value using the given formatter.