Union + positional_order_by + limit

[nemasu]

Hello!

I'm trying to use a union query with positional_order_by and limit.
It compiles fine until I add limit(), I looked at the examples, and I think it should work?

The failing line is here
https://github.com/nemasu/puddle-farm/blob/a3f12a521f0337a3c7d562a206d8aa6ab166c0f4/src/main.rs#L364
(ignore the other 'order by' and 'limit', they would not be used)

The error is quite long, but it starts with:
the method 'limit' exists for struct 'PositionalOrderClause<CombinationClause<Union, Distinct, SelectStatement<..., ..., ..., ...>, ...>, ...>', but its trait bounds were not satisfied.

and ends with
positional_order_dsl.rs(24, 1): doesn't satisfy '_: QueryDsl' or _: Table'

Thanks!

[weiznich]

Support for limit() for union queries landed only recently on the master branch (#4245), so it's not available on any released diesel version yet. That means this behavior is currently expected.

[nemasu]

OK that makes sense. Thank you.

[dessalines]

Was looking for this also, thx!