JingsongLi commented on a change in pull request #8102: [FLINK-12087][table-runtime-blink] Introduce over window operators to blink batch URL: https://github.com/apache/flink/pull/8102#discussion_r272034292
########## File path: flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/generated/BoundComparator.java ########## @@ -0,0 +1,49 @@ +/* + * 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.generated; + +import org.apache.flink.table.dataformat.BaseRow; + +import java.io.Serializable; + +/** + * comparing boundary values. + */ +public interface BoundComparator extends Serializable { + + /** + * reset the comparator. + */ + void reset(); + + /** + * Compares its two row. Returns a negative integer, + * zero, or a positive integer as the first argument is less than, equal + * to, or greater than the second. + * + * @param inputRow the first row to be compared. + * @param inputIndex the index for the first row. + * @param currentRow the second row to be compared. + * @param currentIndex the index for the second row. + * @return a negative integer, zero, or a positive integer as the + * first argument is less than, equal to, or greater than the + * second. + */ + long compare(BaseRow inputRow, int inputIndex, BaseRow currentRow, int currentIndex); Review comment: index is the number of current partition(window). ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
