Fix null-bounds calculation for ranged window queries

rapidsai · Mar 11, 2021 · f4a0bdf · f4a0bdf
1 parent 1544474
commit f4a0bdf
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/cpp/src/rolling/grouped_rolling.cu b/cpp/src/rolling/grouped_rolling.cu
@@ -385,7 +385,7 @@ get_null_bounds_for_timestamp_column(column_view const& timestamp_column,
 
   if (timestamp_column.has_nulls()) {
     auto p_timestamps_device_view = column_device_view::create(timestamp_column);
-    auto num_groups               = group_offsets.size();
+    auto num_groups               = group_offsets.size() - 1;
 
     // Null timestamps exist. Find null bounds, per group.
     thrust::for_each(