getNearest does not support queries over the entire earth

[rocketraman]

Currently getNearest max_dist has a maximum value of approximately 8 million meters [1] .

If one is interested in using getNearest where the possible results can be any document (i.e. over the entire earth), with a slice to get the top-10, or similar logic, then it seems the only way to do that currently is via a full table scan:

.orderBy(r.row("location").distance(point))

cc: @danielmewes

[1] Note that the actual maximum value that can be passed to max_dist is not clear either -- if one uses the value returned in the error message when the value is too large, the same error happens again, presumably because the value used internally is something larger than the value passed.

[danielmewes]

This limitation is a bit hard to resolve with the way getNearest is currently implemented as far as I remember. Putting into backlog for now.