HuangZhenQiu commented on code in PR #24618: URL: https://github.com/apache/flink/pull/24618#discussion_r1583451354
########## flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/lineage/TableColumnLineageEdge.java: ########## @@ -0,0 +1,45 @@ +/* + * 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.flink.table.planner.lineage; + +import org.apache.flink.annotation.PublicEvolving; +import org.apache.flink.streaming.api.lineage.LineageDataset; + +import java.util.List; + +/** + * Column lineage from source table columns to each sink table column, one sink column may be + * aggregated by multiple tables and columns. + */ +@PublicEvolving +public interface TableColumnLineageEdge { + + /** The dataset for source dataset. */ + LineageDataset source(); + + /** + * Columns from one source table of {@link org.apache.flink.streaming.api.lineage.LineageEdge} + * to the sink column. Each sink column may be computed from multiple columns from source, for + * example, avg operator from two columns in the source. + */ + List<String> sourceColumns(); + + /* Sink table column. */ + String sinkColumn(); Review Comment: Yes, it is possible. If so, there will be multiple edges for the source column. -- 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: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
