marton-bod commented on a change in pull request #2407:
URL: https://github.com/apache/hive/pull/2407#discussion_r656887256
##########
File path:
iceberg/iceberg-handler/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergStorageHandlerWithEngine.java
##########
@@ -1273,6 +1274,510 @@ public void testScanTableCaseInsensitive() throws
IOException {
Assert.assertArrayEquals(new Object[] {1L, "Bob", "Green"}, rows.get(1));
}
+ @Test
+ public void testAddColumnToIcebergTable() throws IOException {
+ // Create an Iceberg table with the columns customer_id, first_name and
last_name with some initial data.
+ Table icebergTable = testTables.createTable(shell, "customers",
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+ fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+
+ // Add a new column (age long) to the Iceberg table.
+ icebergTable.updateSchema().addColumn("age",
Types.LongType.get()).commit();
+
+ Schema customerSchemaWithAge = new Schema(optional(1, "customer_id",
Types.LongType.get()),
+ optional(2, "first_name", Types.StringType.get(), "This is first
name"),
+ optional(3, "last_name", Types.StringType.get(), "This is last name"),
+ optional(4, "age", Types.LongType.get()));
+
+ Schema customerSchemaWithAgeOnly =
+ new Schema(optional(1, "customer_id", Types.LongType.get()),
optional(4, "age", Types.LongType.get()));
+
+ // Also add a new entry to the table where the age column is set.
+ icebergTable = testTables.loadTable(TableIdentifier.of("default",
"customers"));
+ List<Record> newCustomerWithAge =
TestHelper.RecordsBuilder.newInstance(customerSchemaWithAge)
+ .add(3L, "James", "Red", 34L).add(4L, "Lily", "Blue", null).build();
+ testTables.appendIcebergTable(shell.getHiveConf(), icebergTable,
fileFormat, null, newCustomerWithAge);
+
+ // Do a 'select *' from Hive and check if the age column appears in the
result.
+ // It should be null for the old data and should be filled for the data
added after the column addition.
+ TestHelper.RecordsBuilder customersWithAgeBuilder =
TestHelper.RecordsBuilder.newInstance(customerSchemaWithAge)
+ .add(0L, "Alice", "Brown", null).add(1L, "Bob", "Green", null).add(2L,
"Trudy", "Pink", null)
+ .add(3L, "James", "Red", 34L).add(4L, "Lily", "Blue", null);
+ List<Record> customersWithAge = customersWithAgeBuilder.build();
+
+ List<Object[]> rows = shell.executeStatement("SELECT * FROM
default.customers");
+ HiveIcebergTestUtils.validateData(customersWithAge,
HiveIcebergTestUtils.valueForRow(customerSchemaWithAge, rows),
+ 0);
+
+ // Do a 'select customer_id, age' from Hive to check if the new column can
be queried from Hive.
+ // The customer_id is needed because of the result sorting.
+ TestHelper.RecordsBuilder customerWithAgeOnlyBuilder =
TestHelper.RecordsBuilder
+ .newInstance(customerSchemaWithAgeOnly).add(0L, null).add(1L,
null).add(2L, null).add(3L, 34L).add(4L, null);
+ List<Record> customersWithAgeOnly = customerWithAgeOnlyBuilder.build();
+
+ rows = shell.executeStatement("SELECT customer_id, age FROM
default.customers");
+ HiveIcebergTestUtils.validateData(customersWithAgeOnly,
+ HiveIcebergTestUtils.valueForRow(customerSchemaWithAgeOnly, rows), 0);
+
+ // Insert some data with age column from Hive. Insert an entry with null
age and an entry with filled age.
+ shell.executeStatement(
+ "INSERT INTO default.customers values (5L, 'Lily', 'Magenta', NULL),
(6L, 'Roni', 'Purple', 23L)");
+
+ customersWithAgeBuilder.add(5L, "Lily", "Magenta", null).add(6L, "Roni",
"Purple", 23L);
+ customersWithAge = customersWithAgeBuilder.build();
Review comment:
No need, this approach works fine I think :)
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