Julian Hyde created CALCITE-3096:
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Summary: 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
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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