Re: GiST for range types (was Re: Range Types - typo + NULL string constructor)

During work on gist for range types I've faced with following problem:

test=# select 'empty'::int4range !?;
ERROR: operator does not exist: int4range !?
LINE 1: select 'empty'::int4range !?;
^
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.

test=# select 'empty'::int4range ?;
ERROR: operator does not exist: int4range ?
LINE 1: select 'empty'::int4range ?;
^
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.

So, !? and ? operators are mentioned in documentation, but don't present in
catalog. Are them just missed in the catalog or there is some more serious
problem?

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With best regards,
Alexander Korotkov.