使用spark从一个配置单元读取所有表，然后写入另一个群集上的另一个配置单元

import org.apache.spark.sql.SparkSession

val spark = SparkSession.builder()
  .appName("Read Tables from Configuration Unit")
  .config("spark.some.config.option", "some-value")
  .getOrCreate()

// 设置数据源的连接信息
val url = "jdbc:mysql://localhost:3306/mydatabase"
val user = "username"
val password = "password"

// 读取所有表
val tables = spark.read
  .format("jdbc")
  .option("url", url)
  .option("user", user)
  .option("password", password)
  .option("dbtable", "(SELECT table_name FROM information_schema.tables WHERE table_schema = 'mydatabase') AS tables")
  .load()

// 打印表名
tables.select("table_name").show()

// 关闭SparkSession
spark.stop()