[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1123) Cannot put more than 1000 elements in a InExpression

[Tom Schneider (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28095 ] 

Tom Schneider commented on HHH-1123:
------------------------------------

I'm not sure the above solution will work for all cases in Oracle.  I think after 2000 elements in the where clause it will error out.  (I have to test this to verify)  Is there anyway to execute more than 1 sql statement in a single criteria?  The solution we typically use is to break the query into multiple queries and merge the results.  Otherwise the in clause has to be broken up outside of Hibernate.

> Cannot put more than 1000 elements in a InExpression
> ----------------------------------------------------
>
>                 Key: HHH-1123
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1123
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.1 rc2, 3.2.0.alpha1
>         Environment: Oracle 9i
>            Reporter: Alexis Seigneurin
>         Attachments: patch.txt
>
>   Original Estimate: 1 hour
>  Remaining Estimate: 1 hour
>
> The number of elements that we can put in a "in" expression is limited to a certain amount (1000 for Oracle, for instance). When creating a criteria query, the org.hibernate.criterion.InExpression class should split the expression into several smaller ones.
> Attached is a patch which splits the expression by slices of 500 elements. For example, if we have 1001 elements to put in the "in" expression, the result would be :
> (entity.field in (?, ?, ?...) or entity.field in (?, ?, ?...) or entity.field in (?))
> The surrounding parantheses are useful to avoid problems with other conditions (a "and" condition taking over the one of the "or" conditions).

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