Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17733#discussion_r113351508
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -663,8 +695,54 @@ class Dataset[T] private[sql](
* @group action
* @since 1.6.0
*/
+ def show(numRows: Int, truncate: Int): Unit = show(numRows, truncate,
extendedMode = false)
+
+ /**
+ * Displays the Dataset in a tabular form. For example:
+ * {{{
+ * year month AVG('Adj Close) MAX('Adj Close)
+ * 1980 12 0.503218 0.595103
+ * 1981 01 0.523289 0.570307
+ * 1982 02 0.436504 0.475256
+ * 1983 03 0.410516 0.442194
+ * 1984 04 0.450090 0.483521
+ * }}}
+ *
+ * If `extendedMode` enabled, this command prints a column dat per line:
+ * {{{
+ * -RECORD 0-----------------
+ * c0 | 0.6988392500990668
+ * c1 | 0.3035961718851606
+ * c2 | 0.2446213804275899
+ * c3 | 0.6132556607194246
+ * c4 | 0.1904412430355646
+ * c5 | 0.8856600775630444
+ * -RECORD 1-----------------
+ * c0 | 0.3942727621020799
+ * c1 | 0.6501707200059537
+ * c2 | 0.2550059028276454
+ * c3 | 0.9806662488156962
+ * c4 | 0.8533897091838063
+ * c5 | 0.3911189623246518
+ * -RECORD 2-----------------
+ * c0 | 0.9024183805969801
+ * c1 | 0.0242018765375147
+ * c2 | 0.8508820250344251
+ * c3 | 0.4593368817024575
+ * c4 | 0.2216918145613194
+ * c5 | 0.3756882647319614
+ * }}}
+ *
+ * @param numRows Number of rows to show
+ * @param truncate If set to more than 0, truncates strings to
`truncate` characters and
+ * all cells will be aligned right.
+ * @param extendedMode Enable expanded table formatting mode to print a
column data per line.
--- End diff --
Yes.
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