fix ut

Signed-off-by: yan zhang <[email protected]>

Author: dirtysalt

be/test/formats/parquet/parquet_variant_test.cpp

@@ -401,7 +401,7 @@ TEST_F(ParquetVariantTest, ObjectPrimitive) {
     EXPECT_EQ(VariantType::STRING, timestamp_field.type());
     EXPECT_EQ("2025-04-16T12:34:56.78", *timestamp_field.get_string());
 
-    EXPECT_ERROR(variant.get_object_by_key(metadata, "unknow"));
+    EXPECT_EQ(variant.get_object_by_key(metadata, "unknow")->type(), VariantType::NULL_TYPE);
 }
 
 TEST_F(ParquetVariantTest, ObjectEmpty) {
@@ -411,7 +411,8 @@ TEST_F(ParquetVariantTest, ObjectEmpty) {
     EXPECT_EQ(VariantType::OBJECT, variant.type());
     EXPECT_EQ(0, *variant.num_elements());
 
-    EXPECT_ERROR(variant.get_object_by_key(metadata, "key"));
+    EXPECT_EQ(variant.get_object_by_key(metadata, "key")->type(), VariantType::NULL_TYPE);
+    EXPECT_ERROR(variant.get_element_at_index(metadata, 0));
 }
 
 TEST_F(ParquetVariantTest, ArrayPrimitive) {
@@ -445,7 +446,7 @@ TEST_F(ParquetVariantTest, ArrayEmpty) {
     EXPECT_EQ(VariantType::ARRAY, variant.type());
     EXPECT_EQ(0, *variant.num_elements());
 
-    EXPECT_ERROR(variant.get_element_at_index(metadata, 0));
+    EXPECT_EQ(variant.get_element_at_index(metadata, 0)->type(), VariantType::NULL_TYPE);
     EXPECT_ERROR(variant.get_object_by_key(metadata, "key"));
 }
 

test/sql/test_iceberg/R/test_iceberg_variant_query_0

@@ -150,7 +150,7 @@ ORDER BY case_id;
 -- result:
 1	alpha	10	hot	Decimal4	Decimal4	1.50000000	3.50000000	1.5	3.5
 2	beta	0	cold	Decimal4	Decimal4	-0.50000000	0.50000000	-0.5	0.5
-3	None	None	None	None	None	None	None	None	None
+3	None	None	None	Null	Null	None	None	None	None
 4	delta	99	warm	Decimal4	Decimal4	0E-8	2.00000000	0.0	2.0
 -- !result
 SELECT 'Query 3: Use variant_query + CAST to coerce nested payloads into primitives.' AS case_description;