[HIVE-18032] Stats: Consolidate stat state for limit 0 and where false

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Zoltan Haindrich
• Reporter: Zoltan Haindrich
• Created: 09/Nov/17 14:29
• Updated: 04/Jul/18 10:12

Description

query (from llap_nullscan.q):

explain
 select * from (select key from src_orc where false) a left outer join (select key from src_orc limit 0)
 b on a.key=b.key

currently:

• limit 0 produces
  Statistics: Num rows: 0 Data size: 0 Basic stats: COMPLETE Column stats: NONE
• where false
  Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE