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https://issues.apache.org/jira/browse/CALCITE-1425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15706441#comment-15706441
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Maryann Xue commented on CALCITE-1425:
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No. Every element in List<RelDataTypeField> is parallel to each other. The
interface is to process one level of field at a time, but allows multiple
matches, which means it does not throw ambiguous-column-exception or
column-not-found-exception instantly. It is up to the caller to handle this.
For getTargetField() in insert/upsert, the logic is simply throw exception is
the resolved field count is not "1" or the left-over names is not empty. For
resolveInNamespace(), I think the interface assigns with the logic that the
"names" can be matched multiple times and added to "resolved".
> Support two-level column structure in INSERT/UPDATE/MERGE
> ---------------------------------------------------------
>
> Key: CALCITE-1425
> URL: https://issues.apache.org/jira/browse/CALCITE-1425
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.10.0
> Reporter: Maryann Xue
> Assignee: Maryann Xue
> Labels: phoenix
> Fix For: 1.11.0
>
>
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