[FLINK-3567] Rework selection when grouping in Table API

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Component/s: Table SQL / API
• Assignee: Fabian Hueske
• Reporter: Timo Walther
• Created: 03/Mar/16 10:41
• Updated: 07/Mar/16 16:33
• Resolved: 07/Mar/16 16:32

Description

table.groupBy("a").select("e")

does not throw any exception.

Fabian looked at the implementation of GroupedTable.select() and it looks incorrect. It does not group but just add a selection. Either we should reject the select or select the value an arbitrary row of the group.