Function query_partitions_context 

pub fn query_partitions_context(
    runtime: Arc<RuntimeEnv>,
    reader_factory: Arc<ReaderFactory>,
    object_store: Arc<dyn ObjectStore>,
    schema: Arc<Schema>,
    partitions: Arc<Vec<Partition>>,
) -> impl Future<Output = Result<SessionContext, Error>>

query_partitions_context returns a context to run queries using the partitions as the “source” table