luoyuxia commented on code in PR #21658: URL: https://github.com/apache/flink/pull/21658#discussion_r1070509695
########## flink-table/flink-table-common/src/main/java/org/apache/flink/table/connector/RowLevelModificationScanContext.java: ########## @@ -0,0 +1,39 @@ +/* + * 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.connector; + +import org.apache.flink.annotation.PublicEvolving; +import org.apache.flink.table.connector.sink.abilities.SupportsRowLevelDelete; +import org.apache.flink.table.connector.sink.abilities.SupportsRowLevelUpdate; +import org.apache.flink.table.connector.source.abilities.SupportsRowLevelModificationScan; + +/** + * The context for scan the table to do updated/delete, designed to provide some necessary + * information that the sink may need to know to from table source to perform update/delete. It'll + * be generated by table source which implements {@link SupportsRowLevelModificationScan}, and then + * passed to the sink which implements {@link SupportsRowLevelUpdate} or {@link + * SupportsRowLevelDelete} for UPDATE/DELETE statement in compile phase. + * + * <p>This mechanism enables the coordination between the source and the sink for the corresponding + * table to be updated/deleted. + * + * <p>The connector can implement this interface to provide custom information. Review Comment: But seems hardly do we use source connector and sink connector. -- 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]
