[DRILL-4605] Flatten doesn't return nested arrays correctly when Union is enabled

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Jacques Nadeau
• Created: 13/Apr/16 21:14
• Updated: 13/Apr/16 21:16

Description

File:

{a:[[1,2,3], [4]]}

set `exec.enable_union_type` = false;

select flatten(a) as a from dfs.tmp.`blue.json`;
+----------+
|    a     |
+----------+
| [1,2,3]  |
| [4]      |
+----------+

set `exec.enable_union_type` = true;

select flatten(a) as a from dfs.tmp.`blue.json`;
+-------+
|   a   |
+-------+
| null  |
| null  |
+-------+

Issue Links

• is depended upon by: DRILL-4538 Turn on Union type by default