Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/20201#discussion_r162733463 --- Diff: sql/core/src/main/java/org/apache/spark/sql/sources/v2/reader/Distribution.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.spark.sql.sources.v2.reader; + +import org.apache.spark.annotation.InterfaceStability; + +/** + * An interface to represent data distribution requirement, which specifies how the records should + * be distributed among the {@link ReadTask}s that are returned by + * {@link DataSourceV2Reader#createReadTasks()}. Note that this interface has nothing to do with + * the data ordering inside one partition(the output records of a single {@link ReadTask}). + * + * The instance of this interface is created and provided by Spark, then consumed by + * {@link Partitioning#satisfy(Distribution)}. This means users don't need to implement --- End diff -- `users ` -> `data source developers`
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org