[hibernate-issues] [Hibernate-JIRA] Issue Comment Edited: (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=44484#comment-44484 ] 

Steve Ebersole edited comment on HHH-1123 at 11/30/11 9:09 PM:
---------------------------------------------------------------

I think we might need to step back here and ask ourselves about the validity of queries with 1000 expression long IN lists and 2000 overall parameters...

But as to the specifics of splitting it up into multiple queries and then I guess merging results back in memory, that for sure will not work.  What about:
{code}
select ... from ... where column_a in (x, ..., x1000) and column_b in (y, ..., y1000)
{code}

      was (Author: steve):
    I think we might need to step back here and ask ourselves about the validity of queries with 1000 expression long IN lists and 2000 overall parameters...

But as to the specifics of splitting it up into multiple queries and then I guess merging results back in memory, that for sure will not work.  What about:
{{code}}
select ... from ... where column_a in (x, ..., x1000) and column_b in (y, ..., y1000)
{{code}}
  
> 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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