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izeigerman/Join_V2.scala

Last active January 30, 2021 22:20
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Join_V2.scala
import shapeless.::
import shapeless.ops.hlist.Prepend
sealed trait Join[L, LJ <: JoinList, R, RJ <: JoinList] {
def join(
left: AnnotatedDataFrame[L, LJ],
right: AnnotatedDataFrame[R, RJ]
)(implicit P: Prepend[LJ, RJ]): AnnotatedDataFrame[L, R :: P.Out]
}
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