[FLINK-12778] Fix deriveTableAggRowType bug for non-composite types

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.9.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Hequn Cheng
• Reporter: Hequn Cheng
• Created: 07/Jun/19 14:29
• Updated: 21/Jun/19 10:12
• Resolved: 21/Jun/19 10:11

Description

Currently, we call aggCalls.get(0).`type`.getFieldList.foreach(builder.add) when derive row type for table aggregate. However, for types which are not composite types, the field list would be null. Table Aggregate should, of course, support non-composite types.

To solve the problem, we should judge whether types are structured. This is because a composite type will be converted to a RelDataType which contains field list and is structured.

Issue Links

• is blocked by: FLINK-12779 Avoid field conflicts when generate field names for non-composite Typeinformation
• links to: GitHub Pull Request #8771