[ 
https://issues.apache.org/jira/browse/HIVE-27234?focusedWorklogId=859800&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-859800
 ]

ASF GitHub Bot logged work on HIVE-27234:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 29/Apr/23 17:29
            Start Date: 29/Apr/23 17:29
    Worklog Time Spent: 10m 
      Work Description: zhangbutao commented on code in PR #4216:
URL: https://github.com/apache/hive/pull/4216#discussion_r1181105965


##########
iceberg/iceberg-handler/src/test/queries/negative/alter_table_create_branch_negative.q:
##########
@@ -0,0 +1,3 @@
+create table ice_tbl (id int, name string) Stored by Iceberg;
+
+alter table ice_tbl create branch test_branch_1;

Review Comment:
   Qtest: creating branch on table without current snapshot will fail



##########
iceberg/iceberg-handler/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergBranchOperation.java:
##########
@@ -0,0 +1,166 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iceberg.mr.hive;
+
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import org.apache.iceberg.SnapshotRef;
+import org.apache.iceberg.Table;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestHiveIcebergBranchOperation extends 
HiveIcebergStorageHandlerWithEngineBase {
+
+  @Test
+  public void testCreateBranchWithDefaultConfig() throws InterruptedException, 
IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s", branchName));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(table.currentSnapshot().snapshotId(), 
ref.snapshotId());
+    Assert.assertNull(ref.minSnapshotsToKeep());
+    Assert.assertNull(ref.maxSnapshotAgeMs());
+    Assert.assertNull(ref.maxRefAgeMs());
+
+    // creating a branch which is already exists will fail
+    try {
+      shell.executeStatement(String.format("ALTER TABLE customers CREATE 
BRANCH %s", branchName));

Review Comment:
   Test: creating a branch which is already exists will fail



##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/HiveIcebergStorageHandler.java:
##########
@@ -676,6 +678,35 @@ public void 
executeOperation(org.apache.hadoop.hive.ql.metadata.Table hmsTable,
     }
   }
 
+  @Override
+  public void createBranchOperation(org.apache.hadoop.hive.ql.metadata.Table 
hmsTable,
+      AlterTableCreateBranchSpec createBranchSpec) {
+    TableDesc tableDesc = Utilities.getTableDesc(hmsTable);
+    Table icebergTable = IcebergTableUtil.getTable(conf, 
tableDesc.getProperties());
+
+    String branchName = createBranchSpec.getBranchName();
+    Optional.ofNullable(icebergTable.currentSnapshot()).orElseThrow(() -> new 
UnsupportedOperationException(

Review Comment:
   Here give a check if table have current snapshot.



##########
iceberg/iceberg-handler/src/test/java/org/apache/iceberg/mr/hive/TestHiveIcebergBranchOperation.java:
##########
@@ -0,0 +1,166 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iceberg.mr.hive;
+
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+import org.apache.iceberg.SnapshotRef;
+import org.apache.iceberg.Table;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestHiveIcebergBranchOperation extends 
HiveIcebergStorageHandlerWithEngineBase {
+
+  @Test
+  public void testCreateBranchWithDefaultConfig() throws InterruptedException, 
IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s", branchName));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(table.currentSnapshot().snapshotId(), 
ref.snapshotId());
+    Assert.assertNull(ref.minSnapshotsToKeep());
+    Assert.assertNull(ref.maxSnapshotAgeMs());
+    Assert.assertNull(ref.maxRefAgeMs());
+
+    // creating a branch which is already exists will fail
+    try {
+      shell.executeStatement(String.format("ALTER TABLE customers CREATE 
BRANCH %s", branchName));
+    } catch (Throwable e) {
+      while (e.getCause() != null) {
+        e = e.getCause();
+      }
+      Assert.assertTrue(e.getMessage().contains("Ref test_branch_1 already 
exists"));
+    }
+  }
+
+  @Test
+  public void testCreateBranchWithSnapshotId() throws InterruptedException, 
IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    Long snapshotId = table.history().get(0).snapshotId();
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s AS OF VERSION %d",
+        branchName, snapshotId));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(snapshotId.longValue(), ref.snapshotId());
+    Assert.assertNull(ref.minSnapshotsToKeep());
+    Assert.assertNull(ref.maxSnapshotAgeMs());
+    Assert.assertNull(ref.maxRefAgeMs());
+  }
+
+  @Test
+  public void testCreateBranchWithMaxRefAge() throws InterruptedException, 
IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    long maxRefAge = 5L;
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s RETAIN %d DAYS",
+        branchName, maxRefAge));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(table.currentSnapshot().snapshotId(), 
ref.snapshotId());
+    Assert.assertNull(ref.minSnapshotsToKeep());
+    Assert.assertNull(ref.maxSnapshotAgeMs());
+    Assert.assertEquals(TimeUnit.DAYS.toMillis(maxRefAge), 
ref.maxRefAgeMs().longValue());
+  }
+
+  @Test
+  public void testCreateBranchWithMinSnapshotsToKeep() throws 
InterruptedException, IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    Integer minSnapshotsToKeep = 2;
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s WITH SNAPSHOT RETENTION %d SNAPSHOTS",
+        branchName, minSnapshotsToKeep));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(table.currentSnapshot().snapshotId(), 
ref.snapshotId());
+    Assert.assertEquals(minSnapshotsToKeep, ref.minSnapshotsToKeep());
+    Assert.assertNull(ref.maxSnapshotAgeMs());
+    Assert.assertNull(ref.maxRefAgeMs());
+  }
+
+  @Test
+  public void testCreateBranchWithMinSnapshotsToKeepAndMaxSnapshotAge() throws 
InterruptedException, IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    Integer minSnapshotsToKeep = 2;
+    long maxSnapshotAge = 2L;
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s WITH SNAPSHOT RETENTION %d SNAPSHOTS" +
+        " %d DAYS", branchName, minSnapshotsToKeep, maxSnapshotAge));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(table.currentSnapshot().snapshotId(), 
ref.snapshotId());
+    Assert.assertEquals(minSnapshotsToKeep, ref.minSnapshotsToKeep());
+    Assert.assertEquals(TimeUnit.DAYS.toMillis(maxSnapshotAge), 
ref.maxSnapshotAgeMs().longValue());
+    Assert.assertNull(ref.maxRefAgeMs());
+  }
+
+  @Test
+  public void testCreateBranchWithAllCustomConfig() throws 
InterruptedException, IOException {
+    Table table =
+        testTables.createTableWithVersions(shell, "customers", 
HiveIcebergStorageHandlerTestUtils.CUSTOMER_SCHEMA,
+            fileFormat, HiveIcebergStorageHandlerTestUtils.CUSTOMER_RECORDS, 
2);
+
+    String branchName = "test_branch_1";
+    Long snapshotId = table.history().get(0).snapshotId();
+    Integer minSnapshotsToKeep = 2;
+    long maxSnapshotAge = 2L;
+    long maxRefAge = 5L;
+    shell.executeStatement(String.format("ALTER TABLE customers CREATE BRANCH 
%s AS OF VERSION %d RETAIN %d DAYS WITH" +
+            " SNAPSHOT RETENTION %d SNAPSHOTS %d days",
+        branchName, snapshotId, maxRefAge, minSnapshotsToKeep, 
maxSnapshotAge));
+    table.refresh();
+    SnapshotRef ref = table.refs().get(branchName);
+    Assert.assertEquals(snapshotId.longValue(), ref.snapshotId());
+    Assert.assertEquals(minSnapshotsToKeep, ref.minSnapshotsToKeep());
+    Assert.assertEquals(TimeUnit.DAYS.toMillis(maxSnapshotAge), 
ref.maxSnapshotAgeMs().longValue());
+    Assert.assertEquals(TimeUnit.DAYS.toMillis(maxRefAge), 
ref.maxRefAgeMs().longValue());
+  }
+
+  @Test
+  public void testCreateBranchWithNonIcebergTable() {
+    shell.executeStatement("create table nonice_tbl (id int, name string)");
+
+    String branchName = "test_branch_1";
+    try {
+      shell.executeStatement(String.format("ALTER TABLE nonice_tbl CREATE 
BRANCH %s", branchName));

Review Comment:
   Test: creating branch on a non-icebeg table will fail





Issue Time Tracking
-------------------

    Worklog Id:     (was: 859800)
    Time Spent: 4h 20m  (was: 4h 10m)

> Iceberg:  CREATE BRANCH SQL implementation
> ------------------------------------------
>
>                 Key: HIVE-27234
>                 URL: https://issues.apache.org/jira/browse/HIVE-27234
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Iceberg integration
>            Reporter: zhangbutao
>            Assignee: zhangbutao
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 4h 20m
>  Remaining Estimate: 0h
>
> Maybe we can follow spark sql about branch ddl implementation 
> [https://github.com/apache/iceberg/pull/6617]



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