Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/19813#discussion_r154949925 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala --- @@ -55,8 +55,20 @@ import org.apache.spark.util.{ParentClassLoader, Utils} * to null. * @param value A term for a (possibly primitive) value of the result of the evaluation. Not * valid if `isNull` is set to `true`. + * @param inputRow A term that holds the input row name when generating this code. + * @param inputVars A list of [[ExprInputVar]] that holds input variables when generating this code. */ -case class ExprCode(var code: String, var isNull: String, var value: String) +case class ExprCode( + var code: String, + var isNull: String, + var value: String, + var inputRow: String = null, + var inputVars: Seq[ExprInputVar] = Seq.empty) + +/** + * Represents an input variable [[ExprCode]] to an evaluation of an [[Expression]]. --- End diff -- please add parameter doc
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