[Hibernate-issues] [Hibernate-JIRA] Reopened: (HB-238) Documentation Bug - Retrieving the size of a collection

[<leg...@at...>]

Message:

   The following issue has been reopened.

   Reopener: Christian Bauer
       Date: Wed, 6 Aug 2003 5:05 PM

OK, thanks for spotting this.
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-238


Here is an overview of the issue:
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        Key: HB-238
    Summary: Documentation Bug - Retrieving the size of a collection
       Type: Improvement

     Status: Reopened
   Priority: Trivial

    Project: Hibernate2
 Components: 
             core
   Fix Fors:
             2.0.2
   Versions:
             2.0.2

   Assignee: 
   Reporter: Paul Rivers

    Created: Wed, 6 Aug 2003 2:23 PM
    Updated: Wed, 6 Aug 2003 5:05 PM

Description:
In the documentation in section 9.13, the is says:

You can count the number of query results without actually returning them: 

Integer size = (Integer) s.filter( collection, "select count(*)" ).get(0);

The query, session.filter() returns a collection, not a list! So the call to .get(0) results in a compile error. Instead, the correct way to do it is listed in the faq:

( (Integer) s.createFilter( collection, "select count(*)" ).iterate().next() ).intValue()



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