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<a class="user-hover" rel="windy" id="email_windy" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=windy" style="color:#6c797f;">Stephan Windmüller</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/JPA-34'>JPA-34</a>
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<a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/JPA-34'><strong>JPA2 Criteria API creates invalid SQL when using groupBy</strong></a>
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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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1.0.1 </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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GroupBy.tar.gz </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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17/Sep/12 7:08 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;'>JPA2 with the Criteria API seems to generate invalid SQL for PostgreSQL. For this code:</p>
<p style='margin-top:0;margin-bottom:10px;'>Root<DBObjectAccessCounter> from = query.from(DBObjectAccessCounter.class);<br/>
Path<DBObject> object = from.get(DBObjectAccessCounter_.object);<br/>
Expression<Long> sum = builder.sumAsLong(from.get(DBObjectAccessCounter_.count));<br/>
query.multiselect(object, sum).groupBy(object);</p>
<p style='margin-top:0;margin-bottom:10px;'>I get the following exception:</p>
<p style='margin-top:0;margin-bottom:10px;'>ERROR: column "dbobject1_.id" must appear in the GROUP BY<br/>
clause or be used in an aggregate function</p>
<p style='margin-top:0;margin-bottom:10px;'>The generated SQL is</p>
<p style='margin-top:0;margin-bottom:10px;'>select dbobjectac0_.object_id as col_0_0_,<br/>
sum(dbobjectac0_.count) as col_1_0_, dbobject1_.id as id1001_,<br/>
dbobject1_.name as name1013_,<br/>
dbobject1_.lastChanged as lastChan2_1013_,<br/>
dbobject1_.type_id as type3_1013_<br/>
from DBObjectAccessCounter dbobjectac0_<br/>
inner join DBObject dbobject1_<br/>
on dbobjectac0_.object_id=dbobject1_.id<br/>
group by dbobjectac0_.object_id</p>
<p style='margin-top:0;margin-bottom:10px;'>This is also the case for a simplified version:</p>
<p style='margin-top:0;margin-bottom:10px;'>Root<DBObjectAccessCounter> from = query.from(DBObjectAccessCounter.class);<br/>
Path<DBObject> object = from.get(DBObjectAccessCounter_.object);<br/>
query.select(object).groupBy(object);</p>
<p style='margin-top:0;margin-bottom:10px;'>Here the following SQL is generated:</p>
<p style='margin-top:0;margin-bottom:10px;'>select dbobject1_.id as id924_, dbobject1_.name as name933_,<br/>
dbobject1_.lastChanged as lastChan2_933_,<br/>
dbobject1_.type_id as type3_933_<br/>
from DBObjectAccessCounter dbobjectac0_<br/>
inner join DBObject dbobject1_<br/>
on dbobjectac0_.object_id=dbobject1_.id<br/>
group by dbobjectac0_.object_id</p>
<p style='margin-top:0;margin-bottom:10px;'>This issue is also discussed on Stackoverflow: <a href="http://stackoverflow.com/questions/12403399/">http://stackoverflow.com/questions/12403399/</a></p>
<p style='margin-top:0;margin-bottom:10px;'>I attached a test case for all three examples (multiselect, simplified, simplified with group by id)</p>
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<strong style="font-weight:normal;color:#505050;">Environment:</strong>
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Hibernate 3.6.8.Final, PostgreSQL 9.1.3
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<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/JPA">Java Persistence API</a>
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<strong style="font-weight:normal;color:#505050;">Labels:</strong>
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jpa2
hibernate
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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>
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<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="windy" id="email_windy" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=windy" style="color:#6c797f;">Stephan Windmüller</a>
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