import org.apache.spark.SparkContext
import org.apache.spark.sql.expressions.{MutableAggregationBuffer, UserDefinedAggregateFunction}
import org.apache.spark.sql.types._
import org.apache.spark.sql.{DataFrame, Row, SparkSession}/*** 自定义函数:* UD
时间:2023-09-11 | 阅读:15