<style>
/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
    #email-body { min-width: 30em !important; }
    #email-page { padding: 8px !important; }
    #email-banner { padding: 8px 8px 0 8px !important; }
    #email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
    #email-fields { padding: 0 8px 8px 8px !important; }
    #email-gutter { width: 0 !important; }
}
</style>
<div id="email-body">
<table id="email-wrap" align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#f0f0f0;color:#000000;width:100%;">
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        <td id="email-page" style="padding:16px !important;">
            <table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#ffffff;border:1px solid #bbbbbb;color:#000000;width:100%;">
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                    <td bgcolor="#3e4c4e" style="background-color:#3e4c4e;color:#ffffff;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="https://www.jboss.org/dms/hibernate/images/jira/jiraheader_hibernate.png" alt="" style="vertical-align:top;" /></td>
                </tr><tr valign="top">
    <td id="email-banner" style="padding:32px 32px 0 32px;">
        
                
        
        
            <table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="width:100%;">
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                                        <img id="email-avatar" src="https://hibernate.onjira.com/secure/useravatar?avatarId=10162" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
                        <div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
                                    <a class="user-hover" rel="neukomm" id="email_neukomm" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=neukomm" style="color:#6c797f;">Neukomm</a>
     created <img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-8026'>HHH-8026</a>
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                        <div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
                <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-8026'><strong>Duplicate constraint names with unique=true</strong></a>
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                <td id="email-gutter" style="width:64px;white-space:nowrap;"></td>
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        <strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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                <img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug">        Bug
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        <strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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                    4.1.10            </td>
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        <strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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                    Unassigned            </td>
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        <strong style="font-weight:normal;color:#505050;">Attachments:</strong>
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                    duplicateconstraintnames.zip            </td>
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        <strong style="font-weight:normal;color:#505050;">Created:</strong>
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        22/Feb/13 4:04 AM
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        <strong style="font-weight:normal;color:#505050;">Description:</strong>
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        <p style='margin-top:0;margin-bottom:10px;'>The fix for <a href="https://hibernate.onjira.com/browse/HHH-7797" title="Inconsistent logic by uses of Dialect#supportsNotNullUnique"><del>HHH-7797</del></a> changed the way unique constraints are generated. Unfortunately, if 'unique=true' is used in a property in the mapping, duplicate constraint names may be generated, which is not supported by most databases (tested with hsqldb 2.2.9, oracle 11g and mssql 2008R2).</p>

<p style='margin-top:0;margin-bottom:10px;'>I've created a junit test that works fine with hibernate-core 4.1.9 but fails with 4.1.10. You'll see error messages in the log when constraints are created and the ConstraintViolationException will not be thrown when creating the second object (although it should be thrown).</p>

<p style='margin-top:0;margin-bottom:10px;'>As far as I've seen there was nothing wrong with the way hibernate 4.1.9 (and also 4.1.7 and earlier) generated unique constraints. So unless there's an actual problem (other than code esthetics) that I'm not aware of, I'd suggest to revert those changes.</p>

<p style='margin-top:0;margin-bottom:10px;'>As a workaround, it is possible to use 'unique-key=&lt;uniqueConstraintName&gt;' instead of 'unique=true'.</p>
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        <strong style="font-weight:normal;color:#505050;">Environment:</strong>
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        windows xp, java 1.6.0_41, hsqldb 2.2.9, oracle 11g, mssql 2008R2
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        <strong style="font-weight:normal;color:#505050;">Project:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
        <a style="color:#6c797f;" href="https://hibernate.onjira.com/browse/HHH">Hibernate ORM</a>
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        <strong style="font-weight:normal;color:#505050;">Priority:</strong>
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                <img src="https://hibernate.onjira.com/images/icons/priority_major.gif" height="16" width="16" border="0" align="absmiddle" alt="Major">        Major
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        <strong style="font-weight:normal;color:#505050;">Reporter:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                                        <a class="user-hover" rel="neukomm" id="email_neukomm" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=neukomm" style="color:#6c797f;">Neukomm</a>
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