Re: Why no jsonb_exists_path()?

Josh Berkus <josh@agliodbs.com> writes:
> I'm noticing a feature gap for JSONB operators; we have no way to do this:

> jsonb_col ? ARRAY['key1','key2','key3']

> ... that is, there is no way for us to check for key existence in an
> indexable fashion.  Given that @> already can check the whole path
> including the value, is there some challenge to stopping just short of
> the value I'm not seeing?  Or is this just a "didn't get to it yet" issue?

Hm, well, the jsonb_path_ops opclass couldn't do it, because what it
indexes is hashes that include the value.  I suppose jsonb_ops could
look for entries that match all of the keys and then see if the ordering
is correct.
        regards, tom lane