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這是怎麼我在火花數據幀使用UDF ..UDF不工作火花階
val sqlContext = new org.apache.spark.sql.SQLContext(sc)
import sqlContext.implicits._
import org.apache.spark.{ SparkConf, SparkContext }
import java.sql.{Date, Timestamp}
import org.apache.spark.sql.Row
import org.apache.spark.sql.types._
import org.apache.spark.sql.functions.udf
import org.apache.spark.sql.functions.input_file_name
import org.apache.spark.sql.functions.regexp_extract
spark.udf.register("get_cus_val", (filePath: String) => filePath.split("\\.")(4))
val df = sqlContext.read.format("csv").option("header", "true").option("delimiter", "|").option("inferSchema","true").load("s3://trfsdisu/SPARK/FinancialLineItem/MAIN")
val df1With_ = df.toDF(df.columns.map(_.replace(".", "_")): _*)
val column_to_keep = df1With_.columns.filter(v => (!v.contains("^") && !v.contains("!") && !v.contains("_c"))).toSeq
val df1result = df1With_.select(column_to_keep.head, column_to_keep.tail: _*)
df1result.withColumn("DataPartition", get_cus_val(input_file_name)).show()
獲取文件名但是當我運行此我得到以下錯誤
<console>:545: error: not found: value get_cus_val
df1result.withColumn("DataPartition", get_cus_val(input_file_name)).show()
但我能夠得到完整路徑的文件的名稱,如果我這樣做..
df1result.withColumn("DataPartition", input_file_name).show()
任何想法我失蹤了什麼?