[IMPALA-8771] Missing stats warning for complex type columns

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 2.13.0, Impala 3.3.0
• Fix Version/s: Impala 3.3.0
• Component/s: Frontend
• Labels: observability
• Epic Color: ghx-label-9
• Assignee: Tamas Mate
• Reporter: Bharath Vissapragada
• Created: 18/Jul/19 21:38
• Updated: 07/Aug/19 14:23
• Resolved: 07/Aug/19 14:23

Description

We currently don't support column stats for complex typed columns (ingored in `compute stats` statements). However running queries against those columns throws the missing col stats warning which is confusing. 

 

select count(*) from
customers c,
c.orders o;

Max Per-Host Resource Reservation: Memory=16.00KB Threads=3
Per-Host Resource Estimates: Memory=36MB
WARNING: The following tables are missing relevant table and/or column statistics.
default.customers
Analyzed query: SELECT count(*) FROM `default`.customers c, c.orders o

 

We could probably skip the warnings if we detect the missing stats are for complex typed columns, until we support them.