walterddr commented on PR #10488:
URL: https://github.com/apache/pinot/pull/10488#issuecomment-1488757582

   > @xiangfu0 Would `CROSS JOIN UNNEST` between correlated LHS and RHS (UNNEST 
basically operates on a field that belongs to left join relation) results only 
in the cross product of the current row of the left table with all the rows 
from the UNNEST output?
   
   that's the definition when doing 
   ```
   ... FROM tbl CROSS JOIN UNNEST(tbl.arrCol)
   ```
   see LATERAL & UNNEST in 
https://www.postgresql.org/docs/current/queries-table-expressions.html


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