| ==== |
| ---- QUERY: IMPALA-2897 |
| # In a right outer join, build side rows that are equivalent (where nulls are considered |
| # equivalent) should compare equal and be placed in the same hash bucket. If they compare |
| # unequal and hash to different buckets, this query exhibits quadratic runtime. |
| # |
| # We have to use an expression (rather than just NULL) in the inner SELECTs because of |
| # IMPALA-2909. |
| select straight_join (x is null) and (y is null) from |
| (select a.id + b.id + null as x from |
| functional.alltypes a, functional.alltypessmall b) c right outer join |
| (select a.id + b.id + null as y from |
| functional.alltypes a, functional.alltypessmall b) d |
| on c.x = d.y limit 1 |
| ---- RESULTS |
| true |
| ---- TYPES |
| BOOLEAN |
| ==== |
