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https://issues.apache.org/jira/browse/FLINK-7003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16062561#comment-16062561
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Shuyi Chen commented on FLINK-7003:
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I've created https://issues.apache.org/jira/browse/CALCITE-1856 to add a new
option in Calcite to allow PEEK_FIELDS but no star flattening.
> "select * from" in Flink SQL should not flatten all fields in the table by
> default
> ----------------------------------------------------------------------------------
>
> Key: FLINK-7003
> URL: https://issues.apache.org/jira/browse/FLINK-7003
> Project: Flink
> Issue Type: Bug
> Reporter: Shuyi Chen
>
> Currently, CompositeRelDataType is extended from
> RelRecordType(StructKind.PEEK_FIELDS, ...). In Calcite,
> StructKind.PEEK_FIELDS would allow us to peek fields for nested types.
> However, when we use "select * from", calcite will flatten all nested fields
> that is marked as StructKind.PEEK_FIELDS in the table.
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