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Posted to issues@impala.apache.org by "bharath v (JIRA)" <ji...@apache.org> on 2019/07/18 21:39:00 UTC

[jira] [Created] (IMPALA-8771) Missing stats warning for complex type columns

bharath v created IMPALA-8771:
---------------------------------

             Summary: Missing stats warning for complex type columns
                 Key: IMPALA-8771
                 URL: https://issues.apache.org/jira/browse/IMPALA-8771
             Project: IMPALA
          Issue Type: Improvement
          Components: Frontend
    Affects Versions: Impala 2.13.0, Impala 3.3.0
            Reporter: bharath v


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. 

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

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



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