Bruce Momjian <pgman@candle.pha.pa.us> writes:
>> Where does textcat fit into things?
> textcat is the internal function mapped to ||. It isn't documented
> anywhere for general use. It does show up in psql \df though. I
> suppose the bug reporter could use that, but it isn't portable to other
> database systems.
textcat only handles the two-input case, however.
regards, tom lane