Re: BUG #5028: CASE returns ELSE value always when type is "char"

Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Joseph Shraibman <jks@selectacast.net> writes:
>> So the type of what is in the ELSE clause determines the type of
>> the output?
>
> If all the other branches are unknown literals, yes.

What's the best place to look to get a handle on what the benefits are
of treating character string literals as being of unknown type?
(Other than the obvious backward compatibility issues.)

-Kevin