Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/16086#discussion_r90451485
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -275,36 +308,43 @@ class Dataset[T] private[sql](
val numCols = schema.fieldNames.length
// Initialise the width of each column to a minimum value of '3'
- val colWidths = Array.fill(numCols)(3)
+ val colMaxWidths = Array.fill(numCols)(3)
+ val colWidths = Array.ofDim[Int](rows.length, numCols)
// Compute the width of each column
+ var j = 0
for (row <- rows) {
for ((cell, i) <- row.zipWithIndex) {
- colWidths(i) = math.max(colWidths(i), cell.length)
+ val width = unicodeWidth(cell)
+ colWidths(j)(i) = width
+ colMaxWidths(i) = math.max(colMaxWidths(i), width)
}
+ j = j + 1
}
// Create SeparateLine
- val sep: String = colWidths.map("-" * _).addString(sb, "+", "+",
"+\n").toString()
+ val sep: String = colMaxWidths.map("-" * _).addString(sb, "+", "+",
"+\n").toString()
// column names
rows.head.zipWithIndex.map { case (cell, i) =>
if (truncate > 0) {
- StringUtils.leftPad(cell, colWidths(i))
+ repeatPadding(colMaxWidths(i) - colWidths(0)(i)).append(cell)
--- End diff --
`StringUtils.leftPad/rightPad` uses String.length. Since this usage causes
the same problem, the new code does not use these methods.
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