You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2015/03/15 21:05:38 UTC
[jira] [Commented] (DRILL-2438) Query on views with Avg on integer
column returns wrong result
[ https://issues.apache.org/jira/browse/DRILL-2438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14362535#comment-14362535 ]
Jacques Nadeau commented on DRILL-2438:
---------------------------------------
Views are not storing nullability.
> Query on views with Avg on integer column returns wrong result
> --------------------------------------------------------------
>
> Key: DRILL-2438
> URL: https://issues.apache.org/jira/browse/DRILL-2438
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 0.8.0
> Reporter: Abhishek Girish
> Assignee: Venki Korukanti
> Priority: Critical
> Fix For: 0.9.0
>
>
> Git.Commit.ID: b3bdc27 (Mar 10)
> Average on an integer column returns an (inaccurate) integer value, instead of an (accurate) decimal value.
> *The following query returns wrong results:*
> {code:sql}
> > SELECT i_item_id, avg(i_manufact_id) agg1
> . . . . . . . . . . . . . . . . . > FROM item
> . . . . . . . . . . . . . . . . . > GROUP BY i_item_id
> . . . . . . . . . . . . . . . . . > ORDER BY i_item_id
> . . . . . . . . . . . . . . . . . > LIMIT 5;
> +------------+------------+
> | i_item_id | agg1 |
> +------------+------------+
> | AAAAAAAAAAABAAAA | 152 |
> | AAAAAAAAAAACAAAA | 187 |
> | AAAAAAAAAAAEAAAA | 251 |
> | AAAAAAAAAABAAAAA | 199 |
> | AAAAAAAAAABBAAAA | 636 |
> +------------+------------+
> 5 rows selected (0.324 seconds)
> {code}
> *Postgres results:*
> {code:sql}
> # SELECT i_item_id, avg(i_manufact_id) agg1
> tpcds1_new-# FROM item
> tpcds1_new-# GROUP BY i_item_id
> tpcds1_new-# ORDER BY i_item_id
> tpcds1_new-# LIMIT 5;
> i_item_id | agg1
> ------------------+----------------------
> AAAAAAAAAAABAAAA | 152.3333333333333333
> AAAAAAAAAAACAAAA | 373.0000000000000000
> AAAAAAAAAAAEAAAA | 251.0000000000000000
> AAAAAAAAAABAAAAA | 198.6666666666666667
> AAAAAAAAAABBAAAA | 636.0000000000000000
> (5 rows)
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)