linyanghao commented on code in PR #7628: URL: https://github.com/apache/iceberg/pull/7628#discussion_r1264719352
########## flink/v1.17/flink/src/main/java/org/apache/iceberg/flink/util/FlinkAlterTableUtil.java: ########## @@ -0,0 +1,176 @@ +/* + * 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.flink.util; + +import java.util.List; +import org.apache.flink.table.catalog.Column; +import org.apache.flink.table.catalog.TableChange; +import org.apache.flink.table.catalog.UniqueConstraint; +import org.apache.iceberg.UpdateProperties; +import org.apache.iceberg.UpdateSchema; +import org.apache.iceberg.flink.FlinkSchemaUtil; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.types.Type; + +public class FlinkAlterTableUtil { + private FlinkAlterTableUtil() {} + + /** + * Applies a list of Flink table changes to an {@link UpdateSchema} operation. + * + * @param pendingUpdate an uncommitted UpdateSchema operation to configure + * @param schemaChanges a list of Flink table changes + */ + public static void applySchemaChanges( + UpdateSchema pendingUpdate, List<TableChange> schemaChanges) { + for (TableChange change : schemaChanges) { + if (change instanceof TableChange.AddColumn) { + TableChange.AddColumn addColumn = (TableChange.AddColumn) change; + Column flinkColumn = addColumn.getColumn(); + Preconditions.checkArgument( + FlinkCompatibilityUtil.isPhysicalColumn(flinkColumn), + "Adding computed columns is not supported yet: %s", + flinkColumn.getName()); + Type icebergType = FlinkSchemaUtil.convert(flinkColumn.getDataType().getLogicalType()); + pendingUpdate.addColumn(flinkColumn.getName(), icebergType); + + } else if (change instanceof TableChange.ModifyColumn) { + TableChange.ModifyColumn modifyColumn = (TableChange.ModifyColumn) change; + applyModifyColumn(pendingUpdate, modifyColumn); + + } else if (change instanceof TableChange.DropColumn) { + TableChange.DropColumn dropColumn = (TableChange.DropColumn) change; + pendingUpdate.deleteColumn(dropColumn.getColumnName()); + + } else if (change instanceof TableChange.AddWatermark) { + throw new UnsupportedOperationException("Adding watermark specs is not supported yet. "); + + } else if (change instanceof TableChange.ModifyWatermark) { + throw new UnsupportedOperationException("Modifying watermark specs is not supported yet. "); + + } else if (change instanceof TableChange.DropWatermark) { + throw new UnsupportedOperationException("Watermark specs is not supported yet. "); Review Comment: Thanks for catching this! -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
