Method lookup_version_set

nodedb/src/control/gateway/plan_cache.rs:202–205

Look up the most recently stored `GatewayVersionSet` for a SQL key. Used by `execute_sql` for the two-phase cache lookup: check the side cache first to recover the version set, then verify it is still current before doing the full `PlanCacheKey` lookup.

(&self, sql_key: &SqlKey)

    /// cache first to recover the version set, then verify it is still current
    /// before doing the full `PlanCacheKey` lookup.
    pub fn lookup_version_set(&self, sql_key: &SqlKey) -> Option<GatewayVersionSet> {
        let inner = self.inner.lock().unwrap_or_else(|p| p.into_inner());
        inner.version_set_index.get(sql_key).cloned()
    }

    /// Store a `GatewayVersionSet` for a SQL key.
    ///