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https://issues.apache.org/jira/browse/CALCITE-3172?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-3172:
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Labels: pull-request-available (was: )
> RelBuilder#empty does not keep aliases
> --------------------------------------
>
> Key: CALCITE-3172
> URL: https://issues.apache.org/jira/browse/CALCITE-3172
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Ruben Quesada Lopez
> Assignee: Ruben Quesada Lopez
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.21.0
>
>
> {{RelBuilder#empty}} method _"Creates a relational expression that reads from
> an input and throws all of the rows away... The default implementation
> creates a Values with the same specified row type as the input"_. However,
> even though the "original" rowType is kept, its aliases are lost, which can
> lead to issues when building a plan (especially because this method is used
> internally by other ones, e.g. by RelBuilder#filter with an "always false"
> filter).
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