test cudf

Author: majetideepak

RFC-0021-gpu-support-cudf.md

@@ -52,10 +52,12 @@ specified inside `config.properties` and catalog `.properties` file.
 The current work so far shows that GPUs can provide good price-performance. However, to make this support user-friendly and get better price-performance, the following improvements are in progress.
 
 ## Work in Progress
+* Add GPU plan nodes.
+    * Driver adapter runs after the drivers/pipelines are built. Limits the adaptation.
+    * Allow efficient fallback to CPU.
 * GPU-GPU exchange using UCX (https://github.com/prestodb/presto/tree/ibm-research-preview).
 * Topology and hardware detection.
 * Metadata queries on CPU only.
-* Efficient fallback to CPU.
 * Session parameter to filter workers.
 * Optimizer cost model to support GPUs.