pvary commented on a change in pull request #2038:
URL: https://github.com/apache/iceberg/pull/2038#discussion_r559627561



##########
File path: 
mr/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergStorageHandlerWithEngine.java
##########
@@ -256,4 +265,293 @@ public void testSelectDistinctFromTable() throws 
IOException {
       Assert.assertEquals(tableName, size, distinctIds);
     }
   }
+
+  @Test
+  public void testInsert() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+
+    Table table = testTables.createTable(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+        fileFormat, ImmutableList.of());
+
+    // The expected query is like
+    // INSERT INTO customers VALUES (0, 'Alice'), (1, 'Bob'), (2, 'Trudy')
+    StringBuilder query = new StringBuilder().append("INSERT INTO customers 
VALUES ");
+    HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS.forEach(record -> 
query.append("(")
+        .append(record.get(0)).append(",'")
+        .append(record.get(1)).append("','")
+        .append(record.get(2)).append("'),"));
+    query.setLength(query.length() - 1);
+
+    shell.executeStatement(query.toString());
+
+    HiveIcebergTestUtils.validateData(table, new 
ArrayList<>(HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS), 0);
+  }
+
+  @Test
+  public void testInsertFromSelect() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+
+    Table table = testTables.createTable(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+        fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+
+    shell.executeStatement("INSERT INTO customers SELECT * FROM customers");
+
+    // Check that everything is duplicated as expected
+    List<Record> records = new 
ArrayList<>(HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+    records.addAll(HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+    HiveIcebergTestUtils.validateData(table, records, 0);
+  }
+
+  @Test
+  public void testInsertFromSelectWithOrderBy() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+
+    // We expect that there will be Mappers and Reducers here
+    Table table = testTables.createTable(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+        fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+
+    shell.executeStatement("INSERT INTO customers SELECT * FROM customers 
ORDER BY customer_id");
+
+    // Check that everything is duplicated as expected
+    List<Record> records = new 
ArrayList<>(HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+    records.addAll(HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS);
+    HiveIcebergTestUtils.validateData(table, records, 0);
+  }
+
+  @Test
+  public void testWriteArrayOfPrimitivesInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema = new Schema(required(1, "id", Types.LongType.get()),
+        required(2, "arrayofprimitives",
+            Types.ListType.ofRequired(3, Types.StringType.get())));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 0L);
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteArrayOfArraysInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema =
+        new Schema(
+            required(1, "id", Types.LongType.get()),
+            required(2, "arrayofarrays",
+                Types.ListType.ofRequired(3, Types.ListType.ofRequired(4, 
Types.StringType.get()))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((List<String>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteArrayOfMapsInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema =
+        new Schema(required(1, "id", Types.LongType.get()),
+            required(2, "arrayofmaps", Types.ListType
+                .ofRequired(3, Types.MapType.ofRequired(4, 5, 
Types.StringType.get(),
+                    Types.StringType.get()))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((List<Map<String, String>>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteArrayOfStructsInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema =
+        new Schema(required(1, "id", Types.LongType.get()),
+            required(2, "arrayofstructs", Types.ListType.ofRequired(3, 
Types.StructType
+                .of(required(4, "something", Types.StringType.get()), 
required(5, "someone",
+                    Types.StringType.get()), required(6, "somewhere", 
Types.StringType.get())))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((List<?>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteMapOfPrimitivesInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema = new Schema(required(1, "id", Types.LongType.get()),
+        required(2, "mapofprimitives", Types.MapType.ofRequired(3, 4, 
Types.StringType.get(),
+            Types.StringType.get())));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((Map<String, String>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteMapOfArraysInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema = new Schema(required(1, "id", Types.LongType.get()),
+        required(2, "mapofarrays",
+            Types.MapType.ofRequired(3, 4, Types.StringType.get(), 
Types.ListType.ofRequired(5,
+                Types.StringType.get()))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((Map<String, List<String>>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteMapOfMapsInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema = new Schema(required(1, "id", Types.LongType.get()),
+        required(2, "mapofmaps", Types.MapType.ofRequired(3, 4, 
Types.StringType.get(),
+            Types.MapType.ofRequired(5, 6, Types.StringType.get(), 
Types.StringType.get()))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((Map<String, Map<String, String>>) 
r.get(1)).isEmpty()).collect(Collectors.toList());
+    testComplexTypeWrite(schema, records);
+  }
+
+  @Test
+  public void testWriteMapOfStructsInTable() throws IOException {
+    Assume.assumeTrue("Tez write is not implemented yet", 
executionEngine.equals("mr"));
+    Schema schema = new Schema(required(1, "id", Types.LongType.get()),
+        required(2, "mapofstructs", Types.MapType.ofRequired(3, 4, 
Types.StringType.get(),
+            Types.StructType.of(required(5, "something", 
Types.StringType.get()),
+                required(6, "someone", Types.StringType.get()),
+                required(7, "somewhere", Types.StringType.get())))));
+    List<Record> records = TestHelper.generateRandomRecords(schema, 5, 
0L).stream()
+        .filter(r -> !((Map<String, GenericRecord>) 
r.get(1)).isEmpty()).collect(Collectors.toList());

Review comment:
       The method used for testing (creating the insert with `array()`) does 
not work for empty arrays, since Hive does not support that. So we need to 
filter out the records with empty arrays. Reworded the code - see if it is 
easier to read or not.
   
   Thanks,
   Peter

##########
File path: 
mr/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergOutputCommitter.java
##########
@@ -188,7 +193,13 @@ private JobConf jobConf(Table table, int taskNum) {
     conf.setNumReduceTasks(0);
     conf.set(HiveConf.ConfVars.HIVEQUERYID.varname, QUERY_ID);
 
-    HiveIcebergStorageHandler.put(conf, table);
+    Map<String, String> propMap = new HashMap<>();

Review comment:
       Fixed




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