Currently queries with unnest and nested columns or complex expressions inside fails:
select u.item from cp.`lateraljoin/nested-customer.parquet` c,
unnest(c.orders.items) as u(item)
fails with error:
VALIDATION ERROR: From line 2, column 10 to line 2, column 21: Column 'orders.items' not found in table 'c'
Add support for LATERAL join
GitHub Pull Request #1346