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https://issues.apache.org/jira/browse/CALCITE-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-3096:
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Fix Version/s: 1.20.0
> In RelBuilder, make alias method idempotent
> -------------------------------------------
>
> Key: CALCITE-3096
> URL: https://issues.apache.org/jira/browse/CALCITE-3096
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
> Fix For: 1.20.0
>
>
> In {{RelBuilder}}, make the {{alias}} method idempotent. If an expression's
> alias is already 'foo', then calling {{alias(e, "foo")}} will return the
> expression unchanged.
> The intent of this change is to reduce the number of {{if}} statements that
> are required in client code that is trying to produce a concise {{RelNode}}
> tree.
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