spark LogicalWriteInfo 源码
spark LogicalWriteInfo 代码
文件路径：/sql/catalyst/src/main/java/org/apache/spark/sql/connector/write/LogicalWriteInfo.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.util.Optional;
import org.apache.spark.annotation.Evolving;
import org.apache.spark.sql.types.StructType;
import org.apache.spark.sql.util.CaseInsensitiveStringMap;
/**
* This interface contains logical write information that data sources can use when generating a
* {@link WriteBuilder}.
*
* @since 3.0.0
*/
@Evolving
public interface LogicalWriteInfo {
/**
* the options that the user specified when writing the dataset
*/
CaseInsensitiveStringMap options();
/**
* {@code queryId} is a unique string of the query. It's possible that there are many queries
* running at the same time, or a query is restarted and resumed. {@link BatchWrite} can use
* this id to identify the query.
*/
String queryId();
/**
* the schema of the input data from Spark to data source.
*/
StructType schema();
/**
* the schema of the ID columns from Spark to data source.
*/
default Optional<StructType> rowIdSchema() {
throw new UnsupportedOperationException(
getClass().getName() + " does not implement rowIdSchema");
}
/**
* the schema of the input metadata from Spark to data source.
*/
default Optional<StructType> metadataSchema() {
throw new UnsupportedOperationException(
getClass().getName() + " does not implement metadataSchema");
}
}
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