Hequn Cheng created FLINK-12778:
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Summary: Fix deriveTableAggRowType bug for non-composite types
Key: FLINK-12778
URL: https://issues.apache.org/jira/browse/FLINK-12778
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: Hequn Cheng
Assignee: Hequn Cheng
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.
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