Trait FallibleRule

pub trait FallibleRule:
    Send
    + Sync
    + Description {
    // Required method
    fn apply(&self, plan: PlanRef) -> ApplyResult;
}

An one-to-one transform for the PlanNode that may return an unrecoverable error that stops further optimization.

An InfallibleRule is always a FallibleRule.

Required Methods

fn apply(&self, plan: PlanRef) -> ApplyResult

Apply the rule to the plan node, which may return an unrecoverable error.

• Returns ApplyResult::Ok if the apply is successful.
• Returns ApplyResult::NotApplicable if it’s not applicable. The optimizer may try other rules.
• Returns ApplyResult::Err if an unrecoverable error occurred. The optimizer should stop applying other rules and report the error to the user.

Implementors

impl<T> FallibleRule for T

where T: InfallibleRule,