[GitHub] [hive] zhangbutao commented on a diff in pull request #4216: HIVE-27234: Iceberg: CREATE BRANCH SQL implementation

["zhangbutao (via GitHub)" <gi...@apache.org>]

zhangbutao commented on code in PR #4216:
URL: https://github.com/apache/hive/pull/4216#discussion_r1172014050


##########
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/branch/create/AlterTableCreateBranchAnalyzer.java:
##########
@@ -0,0 +1,89 @@
+/*
+ * 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.hadoop.hive.ql.ddl.table.branch.create;
+
+import java.util.Locale;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.hadoop.hive.common.TableName;
+import org.apache.hadoop.hive.ql.QueryState;
+import org.apache.hadoop.hive.ql.ddl.DDLSemanticAnalyzerFactory;
+import org.apache.hadoop.hive.ql.ddl.DDLWork;
+import org.apache.hadoop.hive.ql.ddl.table.AbstractAlterTableAnalyzer;
+import org.apache.hadoop.hive.ql.ddl.table.AlterTableType;
+import org.apache.hadoop.hive.ql.exec.TaskFactory;
+import org.apache.hadoop.hive.ql.hooks.ReadEntity;
+import org.apache.hadoop.hive.ql.metadata.Table;
+import org.apache.hadoop.hive.ql.parse.ASTNode;
+import org.apache.hadoop.hive.ql.parse.AlterTableCreateBranchSpec;
+import org.apache.hadoop.hive.ql.parse.HiveParser;
+import org.apache.hadoop.hive.ql.parse.SemanticException;
+
+@DDLSemanticAnalyzerFactory.DDLType(types = HiveParser.TOK_ALTERTABLE_CREATE_BRANCH)
+public class AlterTableCreateBranchAnalyzer extends AbstractAlterTableAnalyzer {
+
+  public AlterTableCreateBranchAnalyzer(QueryState queryState) throws SemanticException {
+    super(queryState);
+  }
+
+  @Override
+  protected void analyzeCommand(TableName tableName, Map<String, String> partitionSpec, ASTNode command)

Review Comment:
   Thanks for comment @TuroczyX . IIUC, I think no need check null here as the parser moduel will do this.  We have defined all required and optional parameters in [`AlterClauseParser.g` ](https://github.com/apache/hive/pull/4216/files#diff-3b0a324eebcad6e32a1bf8bf42499df0739207dbe96f32a3d5e64a44eb002d0fR473), and the then Antlr parser will check if the parameter is correct.



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