Method expect_value

src/sql/src/session/vars.rs:460–467

(&self, var: &VarDefinition)

    }

    fn expect_value<V: Value>(&self, var: &VarDefinition) -> &V {
        let var = self
            .vars
            .get(var.name)
            .expect("provided var should be in state");
        let val = var.value_dyn();
        val.as_any().downcast_ref::<V>().expect("success")
    }

    /// Returns an iterator over the configuration parameters and their current
    /// values for this session.