[SPARK-17124] RelationalGroupedDataset.agg should be order preserving and allow duplicate column names

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.1, 2.1.0
• Component/s: SQL
• Assignee: Peter Lee
• Reporter: Peter Lee
• Created: 18/Aug/16 06:42
• Updated: 20/Aug/16 16:28
• Resolved: 20/Aug/16 16:28

Description

See discussion on the mailing list: http://apache-spark-developers-list.1001551.n3.nabble.com/Re-Aggregations-with-scala-pairs-td18666.html

 def agg(aggExpr: (String, String), aggExprs: (String, String)*): DataFrame = {
    agg((aggExpr +: aggExprs).toMap)
  }

The above implementation is not order preserving, and does not allow duplicate names.

Issue Links

• links to: [Github] Pull Request #14697 (petermaxlee)