Spark SQL (Java) -连接X个文件的廉价方式？

import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;

SparkSession spark = SparkSession.builder()
        .appName("Spark SQL Example")
        .config("spark.some.config.option", "some-value")
        .getOrCreate();

Dataset<Row> df = spark.read().format("csv").option("header", "true").load("file1.csv", "file2.csv", ..., "fileX.csv");

df.createOrReplaceTempView("table");
Dataset<Row> result = spark.sql("SELECT * FROM table WHERE ...");

result.show();