Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> "unknown". This seems to be a cstring (i.e. length 5 considering the
> trailing \0)
Yeah. "unknown" used to have the same representation as "text", ie
varlena, but I changed it recently because I realized that the normal
thing we do with an "unknown" literal is feed it to some datatype's
input converter. Making it the same as cstring saves a conversion step.
regards, tom lane