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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-8753" style="color: #3b73af; text-decoration: none"><img src="https://hibernate.atlassian.net/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-8753" style="color: #3b73af; text-decoration: none">HHH-8753</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-8753" style="color: #3b73af; text-decoration: none">one to one with SqlQuery's addJoin Method couldn't fetch (remains N+1)</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="https://hibernate.atlassian.net/images/icons/issuetypes/bug.png" 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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4.2.7.SP1
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Assignee:
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Unassigned
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Attachments:
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TestHibernateFetchQueryWithTextField.zip
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Components:
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query-sql
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Created:
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27/Nov/13 3:31 AM
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Environment:
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4.2.7.SP1 Windows7 64bit mysql5.5
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Labels:
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hibernate sql sqlquery one-to-one fetch
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Priority:
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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="Jackie Chan" id="email_Jackie Chan" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Jackie+Chan" style="color:#6c797f;; color: #3b73af; text-decoration: none">Jackie Chan</a>
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Original Estimate:
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1h
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Remaining Estimate:
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1h
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It's a very simple condition.I build two class Book And BookDetail,In DB,Table BookDetail has a foreign key refers to the Table Book<br /> classes:<br /> public class Book </p> { private int id; private String name; private BookDetail detail; }
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">public class BookDetail </p> { private int id; private String summary; private Book book; }
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">hbm:</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Book.hbm.xml:<br /> <class name="Book" table="Book" dynamic-insert="true" dynamic-update="true"><br /> <id name="id" type="int"><br /> <generator class="identity"></generator><br /> </id></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> <property name="name" type="string" not-null="true"/></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> <one-to-one name="detail" class="BookDetail" property-ref="book"/><br /> </class><br /> BookDetail.hbm.xml:<br /> <class name="BookDetail" table="BookDetail" dynamic-insert="true" dynamic-update="true" ><br /> <id name="id" type="int"><br /> <generator class="identity"></generator><br /> </id><br /> <property name="summary" type="string" /></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> <many-to-one name="book" column="book_id" class="Book" unique="true"/><br /> </class></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The SqlQuery is simple:<br /> List<Book> booklist = session.createSQLQuery("select </p> {b.*}
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">,</p> {bd.*}
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> from Book as b left outer join BookDetail as bd on bd.book_id = b.id where b.id in (1,2,3)").addEntity("b",Book.class).addJoin("bd", "b", "detail").list();</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">When I execute the SqlQuery, The sql executed like n+1:<br /> Hibernate: select b.id as id1_0_0_, b.name as name2_0_0_,bd.id as id1_1_1_, bd.summary as summary2_1_1_, bd.book_id as book_id3_1_1_ from Book as b left outer join BookDetail as bd on bd.book_id = b.id where b.id in (1,2,3)<br /> Hibernate: select bookdetail0_.id as id1_1_0_, bookdetail0_.summary as summary2_1_0_, bookdetail0_.book_id as book_id3_1_0_ from BookDetail bookdetail0_ where bookdetail0_.book_id=?<br /> Hibernate: select bookdetail0_.id as id1_1_0_, bookdetail0_.summary as summary2_1_0_, bookdetail0_.book_id as book_id3_1_0_ from BookDetail bookdetail0_ where bookdetail0_.book_id=?<br /> Hibernate: select bookdetail0_.id as id1_1_0_, bookdetail0_.summary as summary2_1_0_, bookdetail0_.book_id as book_id3_1_0_ from BookDetail bookdetail0_ where bookdetail0_.book_id=?</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The last 3 sql is unnecessary,addJoin is said to be fetch the BookDetail to the owner Book object.So I think it's a bug.AnyOne can Help me,thx</p>
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