Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/16594#discussion_r102398371
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/Statistics.scala
---
@@ -54,11 +57,29 @@ case class Statistics(
/** Readable string representation for the Statistics. */
def simpleString: String = {
- Seq(s"sizeInBytes=$sizeInBytes",
- if (rowCount.isDefined) s"rowCount=${rowCount.get}" else "",
+ Seq(s"sizeInBytes=${format(sizeInBytes, isSize = true)}",
+ if (rowCount.isDefined) s"rowCount=${format(rowCount.get, isSize =
false)}" else "",
s"isBroadcastable=$isBroadcastable"
).filter(_.nonEmpty).mkString(", ")
}
+
+ /** Show the given number in a readable format. */
+ def format(number: BigInt, isSize: Boolean): String = {
+ val decimalValue = BigDecimal(number, new MathContext(3,
RoundingMode.HALF_UP))
+ if (isSize) {
+ // The largest unit in Utils.bytesToString is TB
+ val PB = 1L << 50
+ if (number < 2 * PB) {
+ // The number is not very large, so we can use Utils.bytesToString
to show it.
+ Utils.bytesToString(number.toLong)
+ } else {
+ // The number is too large, show it in scientific notation.
+ decimalValue.toString() + " B"
+ }
+ } else {
+ decimalValue.toString()
--- End diff --
I'm not sure, will that be more readable than scientific notation if no
unit?
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