diff --git a/regression-test/data/external_table_p0/hive/test_hive_serde_prop.out b/regression-test/data/external_table_p0/hive/test_hive_serde_prop.out
index 3d45e525ecf69c..fd8e7bb4313ea6 100644
--- a/regression-test/data/external_table_p0/hive/test_hive_serde_prop.out
+++ b/regression-test/data/external_table_p0/hive/test_hive_serde_prop.out
@@ -28,28 +28,28 @@ b	2.2
 2	def
 
 -- !8 --
-1	null
+1	\N
 2	|||
 3	aaa
 4	"null"
 
 -- !9 --
-1	null
+1	\N
 2	|||
 3	aaa
 4	"null"
 
 -- !test_open_csv_default_prop --
 1	John Doe	28	50000.75	TRUE	2022-01-15	2023-10-21 14:30:00	4.5	Senior Developer
-2	Jane,Smith			FALSE	2020-05-20			""Project Manager""
+2	Jane,Smith				2020-05-20			""Project Manager""
 
 -- !test_open_csv_standard_prop --
 1	John Doe	28	50000.75	TRUE	2022-01-15	2023-10-21 14:30:00	4.5	Senior Developer
-2	Jane,Smith			FALSE	2020-05-20			"Project Manager"
+2	Jane,Smith				2020-05-20			"Project Manager"
 
 -- !test_open_csv_custom_prop --
 1	John Doe	28	50000.75	TRUE	2022-01-15	2023-10-21 14:30:00	4.5	Senior Developer
-2	Jane,Smith			FALSE	2020-05-20			"Project Manager"
+2	Jane,Smith				2020-05-20			"Project Manager"
 
 -- !1 --
 a	1.1
@@ -80,13 +80,13 @@ b	2.2
 2	def
 
 -- !8 --
-1	null
+1	\N
 2	|||
 3	aaa
 4	"null"
 
 -- !9 --
-1	null
+1	\N
 2	|||
 3	aaa
 4	"null"
@@ -102,3 +102,4 @@ b	2.2
 -- !test_open_csv_custom_prop --
 1	John Doe	28	50000.75	TRUE	2022-01-15	2023-10-21 14:30:00	4.5	Senior Developer
 2	Jane,Smith			FALSE	2020-05-20			"Project Manager"
+