Allow empty clustered Delta read plans

Signed-off-by: Niranjan Artal <nartal@nvidia.com>

Author: nartal1

integration_tests/src/main/python/delta_lake_clustered_reads_test.py

@@ -18,11 +18,13 @@
 from asserts import assert_gpu_and_cpu_are_equal_collect, assert_gpu_fallback_collect
 from data_gen import gen_df, int_gen, string_gen, long_gen, SetValuesGen
 from delta_lake_utils import delta_meta_allow
-from marks import allow_non_gpu, delta_lake, disable_ansi_mode, ignore_order
+from marks import allow_non_gpu, allow_non_gpu_conditional, delta_lake, disable_ansi_mode, \
+    ignore_order
 from spark_session import (
     is_databricks_runtime,
     is_databricks133_or_later,
     is_before_spark_353,
+    is_spark_400_or_later,
     supports_delta_lake_deletion_vectors,
     with_cpu_session,
 )
@@ -69,6 +71,7 @@ def setup_clustered_table(spark, path, table_name, enable_dv):
 
 
 @allow_non_gpu(*delta_meta_allow)
+@allow_non_gpu_conditional(is_spark_400_or_later(), "EmptyRelationExec")
 @delta_lake
 @ignore_order
 @disable_ansi_mode
@@ -104,6 +107,7 @@ def read_query(spark):
 
 
 @allow_non_gpu(*delta_meta_allow)
+@allow_non_gpu_conditional(is_spark_400_or_later(), "EmptyRelationExec")
 @delta_lake
 @ignore_order
 @disable_ansi_mode