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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3820) Consider creating a literal like "D" or "BD" for representing Decimal type constants
Date Thu, 14 Mar 2013 02:36:14 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601983#comment-13601983
] 

Gunther Hagleitner commented on HIVE-3820:
------------------------------------------

[~ashutoshc]: As far as I know there's no SQL standard for it. The other numeric types also
do not seem to follow any standard. I picked D because it doesn't clash with other literals
and seems natural for "decimal".
                
> Consider creating a literal like "D" or "BD" for representing Decimal type constants
> ------------------------------------------------------------------------------------
>
>                 Key: HIVE-3820
>                 URL: https://issues.apache.org/jira/browse/HIVE-3820
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Mark Grover
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-3820.1.patch, HIVE-3820.D8823.1.patch
>
>
> When the HIVE-2693 gets committed, users are going to see this behavior:
> {code}
> hive> select cast(3.14 as decimal) from decimal_3 limit 1;
> 3.140000000000000124344978758017532527446746826171875
> {code}
> That's intuitively incorrect but is the case because 3.14 (double) is being converted
to BigDecimal because of which there is a precision mismatch.
> We should consider creating a new literal for expressing constants of Decimal type as
Gunther suggested in HIVE-2693.

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