[DRILL-2441] Throw unsupported error message in case of inequality join

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Query Planning & Optimization
• Labels: no_verified_test
• Assignee: Aman Sinha
• Reporter: Victoria Markman
• Created: 12/Mar/15 18:05
• Updated: 08/May/15 22:08
• Resolved: 17/Mar/15 18:56

Description

Since we don't support inequality join, the whole class of queries will throw huge page long "Can't plan exception"
This is a request to throw a nice error message that we throw in case of cartesian join in these cases as well.

 
select * from t1 left outer join t2  on (t1.a1 = t2.a2 and t1.b2 <> t2.b2);
select * from t1 right outer join t2 on (t1.a1 = t2.a2 and t1.b2 <> t2.b2);

Example of an exception:

0: jdbc:drill:schema=dfs> select * from t1 inner join t2 on(t1.b1 <> t2.b2);
Query failed: UnsupportedRelOperatorException: This query cannot be planned possibly due to either a cartesian join or an inequality join
Error: exception while executing query: Failure while executing query. (state=,code=0)