符号$
was not recognized correctly. In Spark, using the $
symbol requires importing related implicit conversions. Typically, this problem can be solved by importingspark.implicits._
.
import spark.implicits._
符号$
was not recognized correctly. In Spark, using the $
symbol requires importing related implicit conversions. Typically, this problem can be solved by importingspark.implicits._
.
import spark.implicits._