[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-2655) SQLServer2005Dialect (ROW_NUMBER for Paging)

[João Nascimento Vasconcellos (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

João Nascimento Vasconcellos updated HHH-2655:
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    Attachment: SQLServer2005Dialect.java

Changing "TOP last" to "TOP 100 percent" has a better performance in SQL 2005.

I've create a test to page 20+ records with 4s per page and gain 72% performance.
I've create a test to page 100.000+ records with 100s per page and gain 100% performance.

> SQLServer2005Dialect (ROW_NUMBER for Paging)
> --------------------------------------------
>
>                 Key: HHH-2655
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2655
>             Project: Hibernate3
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 3.2.2, 3.2.3, 3.2.4
>         Environment: SQLServer 2005, Hibernate 3.2.2+
>            Reporter: Wells Tiedeman
>         Attachments: BindingSqlServerDialect.java, SQLServer2005Dialect.java, SQLServer2005Dialect.java, SQLServer2005Dialect.java, SQLServer2005Dialect.java
>
>   Original Estimate: 1 minute
>  Remaining Estimate: 1 minute
>
> Add a SQLServer2005Dialect class to the product that leverages the new ROW_NUMBER capabilities within SQLServer2005 to do paged result sets more efficiently.  See attached source...

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