Jason Dere updated HIVE-15334:
    Attachment: HIVE-15334.1.patch

Changing the precision/scale rules back - will have to see what golden files 
this breaks

> HIVE-13945 changed scale rules for division
> -------------------------------------------
>                 Key: HIVE-15334
>                 URL: https://issues.apache.org/jira/browse/HIVE-15334
>             Project: Hive
>          Issue Type: Bug
>          Components: Types
>            Reporter: Jason Dere
>         Attachments: HIVE-15334.1.patch
> Looks like HIVE-13945 change the decimal division precision/scale rules - the 
> explanation being "Changed the default decimal precision in division, not 
> sure why it was so low by default." 
> (https://issues.apache.org/jira/browse/HIVE-13945?focusedCommentId=15354403&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15354403)
> As far as I can tell this causes decimal division to have a minimum scale of 
> 18.
> cc [~sershe] - the rules that were in place were based on the SQL Server 
> precision/scale rules in 
> https://msdn.microsoft.com/en-us/library/ms190476.aspx
> I'd like to revert this change to precision/scale rules

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