Github user rdblue commented on a diff in the pull request: https://github.com/apache/spark/pull/22009#discussion_r208340913 --- Diff: sql/core/src/main/java/org/apache/spark/sql/sources/v2/reader/BatchReadSupport.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 which defines how to scan the data from data source for batch processing. + */ +@InterfaceStability.Evolving +public interface BatchReadSupport extends ReadSupport { + + /** + * Returns a builder of {@link ScanConfig}. The builder can take some query specific information + * like which operators to pushdown, and keep these information in the created {@link ScanConfig}. --- End diff -- I don't think this statement is very accurate. I would not say that the builder is passed operators to push down because that would imply that it is passed `Projection` and `Filter` nodes.
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