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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZDYxMmEzMDk4MDc4NDg1NThmNjhjOTFjYjQxODEzNTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-14045?atlOrigin=eyJpIjoiZDYxMmEzMDk4MDc4NDg1NThmNjhjOTFjYjQxODEzNTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-f88ada35-084c-43dc-b7e7-6a0de92e9818" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-14045?atlOrigin=eyJpIjoiZDYxMmEzMDk4MDc4NDg1NThmNjhjOTFjYjQxODEzNTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-14045</a> </td>
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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-14045?atlOrigin=eyJpIjoiZDYxMmEzMDk4MDc4NDg1NThmNjhjOTFjYjQxODEzNTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Unable to group by "to_char" function</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-f88ada35-084c-43dc-b7e7-6a0de92e9818" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.3.9 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 28/May/2020 05:00 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> PostgreSQL, Spring Boot </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="jacek445" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_jacek445" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A92c0759e-ac5e-45c8-9d57-2ec9e9936e57"> Jacek Ślimok </a> </td>
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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-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">My final goal is to group entities by a date field with any date interval (such as year, month or hours). This has to be done using Criteria API due to a large amount of surrounding code in the project already utilizing this way of querying for entities. I've already described my case in more detail in the following StackOverflow question: <a href="https://stackoverflow.com/questions/61984604/group-by-date-intervals-using-jpas-criteria-api" class="external-link" rel="nofollow noreferrer" style="color: #3b73af; text-decoration: none">https://stackoverflow.com/questions/61984604/group-by-date-intervals-using-jpas-criteria-api</a></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Because as in example of grouping by month, I need groups like "2019-05" and "2020-05" (same month) to be separate, a simple "MONTH" function is not sufficient. Therefore I'm trying to achieve this using "to_char", hoping to get a query that would look like this:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
SELECT TO_CHAR(sell_date, <span class="code-quote" style="color: #009100">'YYYY-MM'</span>) AS alias1 FROM receipts GROUP BY alias1;
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">My code looks like this:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> void test() {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<<span class="code-object" style="color: #910091">Object</span>[]> query = cb.createQuery(<span class="code-object" style="color: #910091">Object</span>[].class);
Root<?> root = query.from(DbReceipt.class);
Expression<?> expr = cb.function(<span class="code-quote" style="color: #009100">"to_char"</span>, <span class="code-object" style="color: #910091">String</span>.class, root.get(<span class="code-quote" style="color: #009100">"sellDate"</span>), cb.literal(<span class="code-quote" style="color: #009100">"YYYY-MM"</span>));
query.groupBy(expr);
query.multiselect(expr);
TypedQuery<<span class="code-object" style="color: #910091">Object</span>[]> typedQuery = em.createQuery(query);
List<<span class="code-object" style="color: #910091">Object</span>[]> resultList = typedQuery.getResultList();
}
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This code results in the following query and exception:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Hibernate: select to_char(dbreceipt0_.sell_date, ?) as col_0_0_ from receipts dbreceipt0_ group by to_char(dbreceipt0_.sell_date, ?)
24-05-2020 12:16:30.071 [http-nio-1234-exec-5] WARN o.h.e.jdbc.spi.SqlExceptionHelper.logExceptions - SQL Error: 0, SQLState: 42803
24-05-2020 12:16:30.071 [http-nio-1234-exec-5] ERROR o.h.e.jdbc.spi.SqlExceptionHelper.logExceptions - ERROR: column <span class="code-quote" style="color: #009100">"dbreceipt0_.sell_date"</span> must appear in the GROUP BY clause or be used in an aggregate function
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">which to me seems to happen due to the fact that the whole expression has been put into both "select" and "group by" sections of the query. Is there a way to force alias to be used instead using the "groupBy" method? Is there a way around the issue?</p> </td>
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