[jira] [Updated] (IMPALA-6342) Query can incorrectly fail when joining on a decimal column under decimal_v2

["Tim Armstrong (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-6342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong updated IMPALA-6342:
----------------------------------
    Priority: Minor  (was: Major)

> Query can incorrectly fail when joining on a decimal column under decimal_v2
> ----------------------------------------------------------------------------
>
>                 Key: IMPALA-6342
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6342
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>            Reporter: Taras Bobrovytsky
>            Priority: Minor
>
> The following query returns a warning under decimal_v1. However, it returns an error when decimal_v2 is enabled.
> {code}
> with
>   t1 as (select cast(11.11 as decimal(38,3)) as col1),
>   t2 as (select cast(1.11 as decimal(38,37)) as col2)
> select * from t1 join t2 on (col1 = col2)
> {code}
> The problem is that the value in col1 can't be scaled up to a scale 37 without overflowing. This could be bad because the entire query fails under decimal_v2 if a single such value is encountered.
> {noformat



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