OrderBy with a compound index with different orders

[neumino]

Basically a more efficient way for:

r.table("test").orderBy(r.asc("foo"), r.desc("bar"))
r.table("test").orderBy(r.desc("foo"), r.asc("bar"))

Users can work around for numbers by saving the opposite in the index but they cannot do that for strings.

Tagging as RQL_proposal, and putting in backlog for now.
Feel free to move it.

[thelinuxlich]

+1

[brandonbloom]

Related: #3779