varun-lakhyani commented on code in PR #15028:
URL: https://github.com/apache/iceberg/pull/15028#discussion_r2700733821
##########
spark/v4.1/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestMergeSchemaEvolution.java:
##########
@@ -185,6 +186,46 @@ public void testMergeWithSchemaEvolutionNestedStruct() {
sql("SELECT id, s FROM %s ORDER BY id", selectTarget()));
}
+ @TestTemplate
+ public void testMergeWithSchemaEvolutionNestedStructSourceHasFewerFields() {
+ assumeThat(branch).as("Schema evolution does not work for branches
currently").isNull();
+
+ createAndInitTable(
+ "id INT, s STRUCT<c1:INT,c2:STRING,c3:INT>",
+ "{ \"id\": 1, \"s\": { \"c1\": 100, \"c2\": \"aa\", \"c3\": 1000 } }\n"
+ + "{ \"id\": 2, \"s\": { \"c1\": 200, \"c2\": \"bb\", \"c3\": 2000
} }");
+
+ createOrReplaceView(
+ "source",
+ "id INT, s STRUCT<c1:INT,c2:STRING>",
+ "{ \"id\": 1, \"s\": { \"c1\": 10, \"c2\": \"a\" } }\n"
+ + "{ \"id\": 3, \"s\": { \"c1\": 30, \"c2\": \"c\" } }");
+
+ // Rows should have null for missing c3 nested field from source
+ ImmutableList<Object[]> expectedRows =
Review Comment:
Done. Updated in latest commit
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