jerrypeng commented on code in PR #52501: URL: https://github.com/apache/spark/pull/52501#discussion_r2404198221
########## sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/streaming/SupportsRealTimeMode.java: ########## @@ -0,0 +1,47 @@ +/* + * 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.spark.sql.connector.read.streaming; + +import org.apache.spark.annotation.Evolving; +import org.apache.spark.sql.connector.read.InputPartition; + +/** + * A {@link MicroBatchStream} for streaming queries with real time mode. + * + */ +@Evolving +public interface SupportsRealTimeMode { + /** + * Returns a list of {@link InputPartition input partitions} given the start offset. Each + * {@link InputPartition} represents a data split that can be processed by one Spark task. The + * number of input partitions returned here is the same as the number of RDD partitions + * this scan outputs. + */ + InputPartition[] planInputPartitions(Offset start); + + /** + * Merge partitioned offsets coming from {@link SupportsRealTimeMode} instances + * for each partition to a single global offset. + */ + Offset mergeOffsets(PartitionOffset[] offsets); Review Comment: yes essentially. It is the function used to merge offsets returned by each partition at the end of batch which is the starting offset of the batch. -- 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]
