spark DeltaWriter 源码
spark DeltaWriter 代码
文件路径：/sql/catalyst/src/main/java/org/apache/spark/sql/connector/write/DeltaWriter.java
/*
* 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.write;
import java.io.IOException;
import org.apache.spark.annotation.Experimental;
/**
* A data writer returned by {@link DeltaWriterFactory#createWriter(int, long)} and is
* responsible for writing a delta of rows.
*
* @since 3.4.0
*/
@Experimental
public interface DeltaWriter<T> extends DataWriter<T> {
/**
* Deletes a row.
*
* @param metadata values for metadata columns that were projected but are not part of the row ID
* @param id a row ID to delete
* @throws IOException if failure happens during disk/network IO like writing files
*/
void delete(T metadata, T id) throws IOException;
/**
* Updates a row.
*
* @param metadata values for metadata columns that were projected but are not part of the row ID
* @param id a row ID to update
* @param row a row with updated values
* @throws IOException if failure happens during disk/network IO like writing files
*/
void update(T metadata, T id, T row) throws IOException;
/**
* Inserts a new row.
*
* @param row a row to insert
* @throws IOException if failure happens during disk/network IO like writing files
*/
void insert(T row) throws IOException;
@Override
default void write(T row) throws IOException {
insert(row);
}
}
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