Method end_transaction

src/sql/src/session/vars.rs:317–330

(&self, action: EndTransactionAction)

    /// Returns a possibly new SessionVar if this needs to mutate at transaction end.
    #[must_use]
    pub fn end_transaction(&self, action: EndTransactionAction) -> Option<Self> {
        if !self.is_mutating() {
            return None;
        }
        let mut next: Self = self.clone();
        next.local_value = None;
        match action {
            EndTransactionAction::Commit if next.staged_value.is_some() => {
                next.session_value = next.staged_value.take()
            }
            _ => next.staged_value = None,
        }
        Some(next)
    }

    /// Whether this Var needs to mutate at the end of a transaction.
    pub fn is_mutating(&self) -> bool {