]
Tom Schneider commented on HHH-1123:
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I agree that the proposed solution probably wouldn't work in all cases. However,
I've run into this issue myself on a number of occasions. It would be nice if the
framework could help out in these situations. It always seems like there should be a way
to avoid the boilerplate code that you end up writing in these cases. What about a helper
class to help with breaking up the list and execute the query multiple times?
Cannot put more than 1000 elements in a InExpression
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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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