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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-8864" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-9c03ac32-b96f-4027-9e95-33c71dae15a4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-8864" style="color: #3b73af; text-decoration: none">HHH-8864</a>
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<td style="vertical-align: top;; padding: 0px; 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-8864" style="color: #3b73af; text-decoration: none">PostgreSQL dialect worng for distinc tuples</a> </span>
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Issue Type:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-bug-9c03ac32-b96f-4027-9e95-33c71dae15a4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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4.3.0.Final, 4.2.0.Final
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Assignee:
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Unassigned
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Components:
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core, query-hql
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Created:
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14/Jan/14 1:15 PM
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Environment:
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Hibernate version - 4.2.0.SP1 running on EAP 6.1.1 <br /> Databse - Postgres 9.2 <br /> RHEL 6 <br /> JDBC driver - postgresql-9.2-1002.jdbc4.jar <br /> Dialect - PostgreSQLDialect
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Labels:
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core query postgres postgresql dialect grammar hql
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Priority:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-bd1fd99f-3646-4361-8617-a9ee442a1f34" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom" /> Major
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="hannelita" id="email_hannelita" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=hannelita" style="color:#6c797f;; color: #3b73af; text-decoration: none">Hanneli Tavante</a>
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Original Estimate:
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4h
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Remaining Estimate:
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4h
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Hello guys!<br /> When executing the following HQL:<br /> select count(distinct c) from ControlVO c<br /> (note - ControlVO has a composite key made trough EmbbededID)<br /> The following SQL outpu on 4.0.1 is:<br /> select count(distinct (control0_.cve_cod_cooperat_singular,<br /> control0_.cve_dt_criacao, control0_.cve_nro_doc_dev)) as<br /> col_0_0_ from <span class="error">[....]</span><br /> This works fine on Postgres 9.2.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">However, when using 4.2.0.SP1 and newer versions, the generated SQL is:<br /> select count(distinct control0_.cve_cod_cooperat_singular, control0_.cve_dt_criacao, control0_.cve_nro_doc_dev) as col_0_0_ from <span class="error">[...]</span></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Note it's missing a '(' after distinct clause. This causes a dam problem on Postgres, generating the a SQLGrammarException:</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><span class="error">[org.hibernate.engine.jdbc.spi.SqlExceptionHelper]</span><br /> (http-localhost/127.0.0.1:8080-2) ERROR: function count(numeric, timestamp<br /> without time zone, numeric) does not exist<br /> No function matches the given name and argument types. You might<br /> need to add explicit type casts.<br /> Posição: 8<br /> 11:57:14,725 ERROR <span class="error">[stderr]</span> (http-localhost/127.0.0.1:8080-2)<br /> org.hibernate.exception.SQLGrammarException: could not extract ResultSet<br /> 11:57:14,726 ERROR <span class="error">[stderr]</span> (http-localhost/127.0.0.1:8080-2) at<br /> org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:122)<br /> 11:57:14,727 ERROR <span class="error">[stderr]</span> (http-localhost/127.0.0.1:8080-2) at<br /> org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Well, I dig into the code and tried to change to PostgreSQL81Dialect or PostgreSQL82Dialect or even PostgreSQL9Dialect for the 4.3.0.Final version and it kept wrong. I could notice the following changelog at 4.1.2 - <a href="https://github.com/hibernate/hibernate-orm/commit/c3fc7f321476659546ae21b444e33395f801213a#diff-1" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">HH-7165</a>. I took a look into the method </p>
<div class="code panel" style="border-style: solid;border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<b>Dialect.java</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
/**
* Does <span class="code-keyword" style="color: #000091">this</span> dialect support `count(distinct a,b)`?
*
* @<span class="code-keyword" style="color: #000091">return</span> True <span class="code-keyword" style="color: #000091">if</span> the database supports counting distinct tuples; <span class="code-keyword" style="color: #000091">false</span> otherwise.
*/
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> supportsTupleDistinctCounts() {
<span class="code-comment" style="color: #808080">// oddly most database in fact seem to, so <span class="code-keyword" style="color: #000091; color: #808080">true</span> is the <span class="code-keyword" style="color: #000091; color: #808080">default</span>.
</span> <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">true</span>;
}
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">PostgreSQLDialect82.java returns <b>false</b> for this method. Is this right? It should consider counting distinct tuples.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I don't know if this is thr problem. I think not, since this method always returned false. But why on 4.0.1 we had the proper SQL and now on 4.2.0.SP1 we don't?</p>
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