[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5769) Add batch-size parameter to join element

[Kargapolov Andrey (JIRA)]

Add batch-size parameter to join element
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                 Key: HHH-5769
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5769
             Project: Hibernate Core
          Issue Type: Improvement
          Components: core
    Affects Versions: 3.6.0
            Reporter: Kargapolov Andrey


I our project we use mix table-per-hiearachy (with a discriminator column) and table-per-class with <join>. If set fetch="select" for join table, then hibernate not use batch load data from this table, hibernate generate n queries.
May be add batch-size paramenter to <join> element for improve perfomance. Hibernate will load discriminators and group elements by class, after use batch load for groups.

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