Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/17733#discussion_r113347676 --- 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 --- End diff -- ok
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