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https://issues.apache.org/jira/browse/FLINK-12778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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sunjincheng closed FLINK-12778.
-------------------------------
Resolution: Fixed
Fix Version/s: 1.9.0
Fixed in master: 18dedb7749b0c8672d28dadb290d66ca3d12a87d
> 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
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.9.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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