diff --git a/rill-openrtb-prog-ads/models/auction_data_model.sql b/rill-openrtb-prog-ads/models/auction_data_model.sql
index 2801373..207b9f1 100644
--- a/rill-openrtb-prog-ads/models/auction_data_model.sql
+++ b/rill-openrtb-prog-ads/models/auction_data_model.sql
@@ -1,5 +1,4 @@
-select * EXCLUDE (device_region), 
-CASE WHEN device_region ILIKE '%/%' THEN SPLIT(device_region, '/')[2] ELSE 'Unknown' END AS device_state, 
-CASE WHEN device_region ILIKE '%/%' THEN SPLIT(device_region, '/')[1] ELSE 'Unknown' END AS device_country
-from auction_data_raw
-
+select * EXCEPT (device_region), 
+CASE WHEN device_region ILIKE '%/%' THEN splitByChar('/', assumeNotNull(device_region))[2] ELSE 'Unknown' END AS device_state, 
+CASE WHEN device_region ILIKE '%/%' THEN splitByChar('/', assumeNotNull(device_region))[1] ELSE 'Unknown' END AS device_country
+from {{ ref "auction_data_raw" }}
diff --git a/rill-openrtb-prog-ads/models/bids_data_model.sql b/rill-openrtb-prog-ads/models/bids_data_model.sql
index 7ff74f0..a293005 100644
--- a/rill-openrtb-prog-ads/models/bids_data_model.sql
+++ b/rill-openrtb-prog-ads/models/bids_data_model.sql
@@ -1,2 +1,2 @@
 select *
-from bids_data_raw
\ No newline at end of file
+from {{ ref "bids_data_raw" }}
\ No newline at end of file