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

[Steve Ebersole (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44480#comment-44480 ] 

Steve Ebersole commented on HHH-1123:
-------------------------------------

Not sure what y'all are proposing as the fix here.  Splitting the query is not a viable option.  Yes it will work in some cases, but it will not work as a general solution.  And as some have even mentioned on this thread, for some dialect its not just a restriction on the number of expressions allowed in an in-list; in some databases it is a restriction for the number of parameters allowed in the query overall.  So just splitting the one-big-in-list into multiple smaller sized in lists OR'ed together is not going to address that.

I am completely inclined to reject this, tbh...

> Cannot put more than 1000 elements in a InExpression
> ----------------------------------------------------
>
>                 Key: HHH-1123
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1123
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.1 rc2, 3.2.0.alpha1
>         Environment: Oracle 9i
>            Reporter: Alexis Seigneurin
>            Assignee: Strong Liu
>         Attachments: Animal.hbm.xml, hibernate-inexpression-oracle-3.2.patch, HQLHelper.java, LongInElementsTest.java, patch.txt
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> 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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