Self Joins not Possible with Alias

[Alex Kennedy]

This query which performs a self join using an alias:

select nexmark_50000.person as seller_record
from nexmark_50000
join nexmark_50000 as t2
    on nexmark_50000.auction.seller = t2.person.id
where nexmark_50000.person is not null;

does not parse correctly from DF SQL to syn expr

only support converting column expressions to columns.

[Jackson Newhouse]

It's not really the aliasing, but rather that you're trying to join on a subfield of a struct. The call is being made here. Right now that is partially done so we can guarantee there is a valid column name for the key's struct, but we will extend join capabilities in the future.