Github user tanejagagan commented on a diff in the pull request: https://github.com/apache/spark/pull/16497#discussion_r95091986 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Percentile.scala --- @@ -51,26 +51,42 @@ import org.apache.spark.util.collection.OpenHashMap _FUNC_(col, array(percentage1 [, percentage2]...)) - Returns the exact percentile value array of numeric column `col` at the given percentage(s). Each value of the percentage array must be between 0.0 and 1.0. + + _FUNC_(col, frequency, percentage) - Returns the exact percentile value of numeric column `col` + with frequency column `frequency` at the given percentage. The value of percentage must be + between 0.0 and 1.0. + + _FUNC_(col, frequency, array(percentage1 [, percentage2]...)) - Returns the exact percentile + value array of numeric column `col` with frequency column `frequency` at the given percentage(s). + Each value of the percentage array must be between 0.0 and 1.0. + """) case class Percentile( child: Expression, + frequency : Expression, percentageExpression: Expression, mutableAggBufferOffset: Int = 0, inputAggBufferOffset: Int = 0) extends TypedImperativeAggregate[OpenHashMap[Number, Long]] with ImplicitCastInputTypes { def this(child: Expression, percentageExpression: Expression) = { - this(child, percentageExpression, 0, 0) + this(child, Literal(1l), percentageExpression, 0, 0) + } + + def this(child: Expression, frequency: Expression, percentageExpression: Expression) = { + this(child, frequency, percentageExpression, 0, 0) } + private val unit = Literal(1l) + override def prettyName: String = "percentile" override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): Percentile = copy(mutableAggBufferOffset = newMutableAggBufferOffset) override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): Percentile = copy(inputAggBufferOffset = newInputAggBufferOffset) - + --- End diff -- Did not realize that I had forgotten to do the men build which does the style check as well
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