[DRILL-1395] UNION ALL query fails "while setting up Foreman"

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.5.0
• Fix Version/s: 1.2.0
• Component/s: Query Planning & Optimization
• Assignee: Sean Hsuan-Yi Chu
• Reporter: Bob Rumsby
• Created: 10/Sep/14 05:51
• Updated: 05/Sep/15 01:01
• Resolved: 02/Jul/15 20:48

Description

The two sides of the UNION are not equivalent because one of the files has an additional column, but Aman tells me that this should work in a schema-less environment anyway. (I was expecting it to fail but with a more meaningful error because I am used to relational database UNION queries where a corresponding number of columns is expected on either side of the UNION operator.)

The query fails whether or not the LIMIT is applied. EXPLAIN for this query also fails.

0: jdbc:drill:> select * from `clicks/clicks.campaign.json` union all select * from `clicks/clicks.json` limit 5;
Query failed: Failure while setting up Foreman. DrillUnionRel#23471 [159a4852-e190-4edf-b11e-2d62db8efbd7]

Error: exception while executing query: Failure while trying to get next result batch. (state=,code=0)

Issue Links

• is related to: DRILL-2414 Union-All on SELECT * FROM schema-less data source will throw exception