xiarixiaoyao commented on code in PR #4910: URL: https://github.com/apache/hudi/pull/4910#discussion_r849199905
########## hudi-common/src/main/java/org/apache/hudi/internal/schema/utils/SchemaChangeUtils.java: ########## @@ -0,0 +1,305 @@ +/* + * 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.hudi.internal.schema.utils; + +import org.apache.hudi.internal.schema.InternalSchema; +import org.apache.hudi.internal.schema.Type; +import org.apache.hudi.internal.schema.Types; +import org.apache.hudi.internal.schema.action.TableChanges; +import org.apache.hudi.internal.schema.action.TableChangesHelper; + +import java.util.ArrayList; +import java.util.List; + +/** + * Helper methods for schema Change. + */ +public class SchemaChangeUtils { + private SchemaChangeUtils() { + + } + + /** + * Whether to allow the column type to be updated. + * now only support: + * int => long/float/double/string + * long => float/double/string + * float => double/String + * double => String/Decimal + * Decimal => Decimal/String + * String => date/decimal + * date => String + * TODO: support more type update. + * + * @param src origin column type. + * @param dsr new column type. + * @return whether to allow the column type to be updated. + */ + public static boolean isTypeUpdateAllow(Type src, Type dsr) { + if (src.isNestedType() || dsr.isNestedType()) { Review Comment: lets open another pr to track and modfiy those new comments -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
