Minor: Make BuiltInScalarFunction::alias
a method
#8349
Merged
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Which issue does this PR close?
Part of #8348
Rationale for this change
I want to have ScalarUDF support aliases, and thus I want to have aliases handled as part of Expr::ScalarFunction rather than a free function. By refactoring
BuiltInScalarFunction::alias
it will make it easier to handle uniformly.What changes are included in this PR?
BuiltInScalarFunction::alias
a functionAre these changes tested?
Covered by existing tests
Are there any user-facing changes?