[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-465) order by nulls first / last

[Eric Jain (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=42384#action_42384 ] 

Eric Jain commented on HHH-465:
-------------------------------

This would be quite helpful for making applications behave more consistently across databases; I ran into this when I noticed that H2 (which we use for testing) sorts nulls lower, whereas PostgreSQL (which we use in production) sorts nulls higher...

> order by nulls first / last
> ---------------------------
>
>                 Key: HHH-465
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-465
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.0.3
>            Reporter: Anthony Patricio
>            Priority: Minor
>         Attachments: CustomNullsFirstInterceptor.java
>
>
> support of nulls first / last in order clause
> "NULLS LAST" is part of the SQL 99 standard. 
> The syntax is as follows: 
> ORDER BY [COLUMN NAME] [ASC | DESC] [NULLS FIRST | NULLS LAST] 
> In different DBs, the sorting of nulls relative to other values is handled differently. 
> PostgreSQL - Nulls are considered HIGHER than non-nulls. 
> DB2 - Higher 
> MSSQL - Lower 
> MySQL - Lower 
> Oracle - Higher 
> The following DBs have supported this functionality: 
> DB2 V7 
> Oracle 9i 
> PostgreSQL, MySQL, SQLServer do not appear to support this from what I can gather.
> see http://forum.hibernate.org/viewtopic.php?t=942176&start=0&postdays=0&postorder=asc&highlight=

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