Github user xuejianbest commented on a diff in the pull request:
https://github.com/apache/spark/pull/22048#discussion_r213882803
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -301,16 +301,16 @@ class Dataset[T] private[sql](
// Compute the width of each column
for (row <- rows) {
for ((cell, i) <- row.zipWithIndex) {
- colWidths(i) = math.max(colWidths(i), cell.length)
+ colWidths(i) = math.max(colWidths(i),
Utils.stringHalfWidth(cell))
}
}
val paddedRows = rows.map { row =>
row.zipWithIndex.map { case (cell, i) =>
if (truncate > 0) {
- StringUtils.leftPad(cell, colWidths(i))
--- End diff --
This method fills the string to the specified length.
But what you need to do here is to increase the string by the specified
length by padding.
If you want to use this function, code programming:
`StringUtils.leftPad(cell, colWidths(i) - Utils.stringHalfWidth(cell) +
cell.length)`
I think it is more difficult to understand.
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