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                                    <!-- there needs to be content in the cell for it to render in some clients --> 
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                                        <table class="page-title-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0; mso-table-rspace: 0"> 
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                                                    <td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-6686" style="color: #3b73af; text-decoration: none">Re: JPQL operator "is empty" failes for @ElementCollection</a> </span> </td> 
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                                        <table class="text-paragraph-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0; mso-table-rspace: 0; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 2px"> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin: 10px 0 0; margin-top: 0">This happens with Criteria queries as well.</p> <p style="margin: 10px 0 0">Example (using <tt>5.1.8.Final</tt>):</p> <p style="margin: 10px 0 0"><tt>Expant.java</tt>:</p> 
                                                        <div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
                                                            <div class="preformattedContent panelContent" style="padding: 9px 12px"> 
                                                                <pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">    /**
     * Get associated {@link DataPoint}s.
     */
    @ElementCollection
    @CollectionTable(name = "DataPoint", joinColumns = @JoinColumn(name = "expant", nullable = false))
    @NotNull
    public Set&lt;DataPoint&gt; getDataPoints() {
        return this.dataPoints;
    }
    public void setDataPoints(Set&lt;DataPoint&gt; dataPoints) {
        this.dataPoints = dataPoints;
    }
</pre> 
                                                            </div>
                                                        </div> <p style="margin: 10px 0 0">Query:</p> 
                                                        <div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
                                                            <div class="preformattedContent panelContent" style="padding: 9px 12px"> 
                                                                <pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">Root&lt;Expant&gt; expant = ...
... builder.isNotEmpty(expant.get(Expant_.dataPoints))...
</pre> 
                                                            </div>
                                                        </div> <p style="margin: 10px 0 0">Error:</p> 
                                                        <div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
                                                            <div class="preformattedContent panelContent" style="padding: 9px 12px"> 
                                                                <pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected end of subtree [select generatedAlias0 from com.example.model.Patient as generatedAlias0 where ( exists (select gen
eratedAlias1 from com.example.model.Patient as generatedAlias2 inner join generatedAlias2.annotations as generatedAlias1 where ( generatedAlias0.id=generatedAlias2.id ) and ( key(generatedAlias1)=:param0 )) ) and ( exists (sel
ect generatedAlias3.id from com.example.model.Expant as generatedAlias3 where ( generatedAlias3.patientId=generatedAlias0.id ) and ( generatedAlias3.experimentUUIDAsString=:param1 ) and ( generatedAlias3.experimentUUIDAsString
=:param2 ) and ( generatedAlias3.dataPoints is not empty )) ) order by generatedAlias0.name.lastName asc, generatedAlias0.name.firstName asc]
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1679)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1608)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:551)
        at org.hibernate.jpa.criteria.CriteriaQueryImpl$1.buildCompiledQuery(CriteriaQueryImpl.java:316)
        at org.hibernate.jpa.criteria.compile.CriteriaCompiler.compile(CriteriaCompiler.java:130)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:699)
        at sun.reflect.GeneratedMethodAccessor353.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298)
        at com.sun.proxy.$Proxy68.createQuery(Unknown Source)
        at org.dellroad.stuff.dao.CriteriaCallback.buildQuery(CriteriaCallback.java:40)
        at org.dellroad.stuff.dao.CriteriaCallback.buildQuery(CriteriaCallback.java:19)
        at org.dellroad.stuff.dao.QueryCallback.query(QueryCallback.java:29)
        at org.dellroad.stuff.spring.AbstractDAO.getBy(AbstractDAO.java:156)
        &lt;other stack frames elided&gt;
        ... 31 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected end of subtree [select generatedAlias0 from com.example.model.Patient as generatedAlias0 where ( exists (select generatedAlias1 from com.example.model.Patient as generatedAlias2 inner join generatedAlias2.annotations as generatedAlias1 where ( generatedAlias0.id=generatedAlias2.id ) and ( key(generatedAlias1)=:param0 )) ) and ( exists (select generatedAlias3.id from com.example.model.Expant as generatedAlias3 where ( generatedAlias3.patientId=generatedAlias0.id ) and ( generatedAlias3.experimentUUIDAsString=:param1 ) and ( generatedAlias3.experimentUUIDAsString=:param2 ) and ( generatedAlias3.dataPoints is not empty )) ) order by generatedAlias0.name.lastName asc, generatedAlias0.name.firstName asc]
        at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79)
        at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:218)
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:142)
        at org.hibernate.engine.query.spi.HQLQueryPlan.&lt;init&gt;(HQLQueryPlan.java:115)
        at org.hibernate.engine.query.spi.HQLQueryPlan.&lt;init&gt;(HQLQueryPlan.java:76)
        at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150)
        at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:302)
        at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:240)
        at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1907)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:531)
        ... 65 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected end of subtree
        at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:74)
        at org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:91)
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.generate(QueryTranslatorImpl.java:250)
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:210)
        ... 73 more
</pre> 
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{
  "@context": "http://schema.org",
  "@type": "EmailMessage",
  "description": "View Issue",
  "potentialAction": {
    "@type": "ViewAction",
        "target": "https://hibernate.atlassian.net/browse/HHH-6686?inbox=true&focusedCommentId=102271&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-102271",
    "name": "View Comment"
      },
  "publisher": {
    "@type": "Organization",
    "name": "Atlassian",
    "url": "https://www.atlassian.com"
  }
}
</script> 
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                                                    <td id="actions-pattern-container" valign="middle" style="padding: 0; border-collapse: collapse; padding: 10px 0 10px 24px; vertical-align: middle; padding-left: 0"> 
                                                        <table align="left" style="border-collapse: collapse; mso-table-lspace: 0; mso-table-rspace: 0"> 
                                                            <tbody>
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                                                                    <td class="actions-pattern-action-text-container" style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 4px; padding-left: 5px"> <a href="https://hibernate.atlassian.net/browse/HHH-6686#add-comment" target="_blank" title="Add Comment" style="color: #3b73af; text-decoration: none">Add Comment</a> </td> 
                                                                </tr> 
                                                            </tbody>
                                                        </table> </td> 
                                                </tr> 
                                            </tbody>
                                        </table> </td> 
                                </tr> 
                                <!-- there needs to be content in the cell for it to render in some clients --> 
                                <tr> 
                                    <td class="email-content-rounded-bottom mobile-expand" style="padding: 0; border-collapse: collapse; color: #ffffff; padding: 0 15px 0 16px; height: 5px; line-height: 5px; background-color: #ffffff; border-top: 0; border-left: 1px solid #cccccc; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; mso-line-height-rule: exactly" height="5" bgcolor="#ffffff">&nbsp;</td> 
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                        </table> </td> 
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                    <td id="footer-pattern" style="padding: 0; border-collapse: collapse; padding: 12px 20px"> 
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