Drew Schmitt created CALCITE-3986:
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Summary: Provide config option to omit assigning an alias that is
identical to its identifier.
Key: CALCITE-3986
URL: https://issues.apache.org/jira/browse/CALCITE-3986
Project: Calcite
Issue Type: Improvement
Reporter: Drew Schmitt
The current alias assignment logic with the SqlValidator config option
identifierExpansion() set to true will eagerly try to choose an alias, even if
the alias name ends up being the same as the identifier itself. For example, it
will assign the alias "foo" for the table "foo".
It's nice to have alias assignment, but making it identical to the identifier
doesn't always provide a whole lot of value and can make queries more verbose
than they need to be.
Suggest we add another SqlValidator config option (defaulted to the current
behavior) to allow a caller to disable alias assignment in the cases that it
would be identical to the identifier.
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