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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=eyJpIjoiNjcyMTMwODZjODljNDA4MDhiNjM3YjlkYTgxZGY3YzMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-13982?atlOrigin=eyJpIjoiNjcyMTMwODZjODljNDA4MDhiNjM3YjlkYTgxZGY3YzMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-62e26e6e-2ed7-4008-9a57-4411d358119d" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-13982?atlOrigin=eyJpIjoiNjcyMTMwODZjODljNDA4MDhiNjM3YjlkYTgxZGY3YzMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-13982</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-13982?atlOrigin=eyJpIjoiNjcyMTMwODZjODljNDA4MDhiNjM3YjlkYTgxZGY3YzMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Incorrect FK column generated/used when using @OneToMany with @Inheritance(strategy = InheritanceType.JOINED)</a> </span> </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="vasiliy.muzychenko" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_vasiliy.muzychenko" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5a72fc7a2d61371e861f231e"> Василий Музыченко </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"> <span class="diffcontext"> [^hibernate-one-to-many-bug.zip]</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br><br></span> <span class="diffcontext"> Hi everyone. Here are some entities to demonstrate this (getters/setters omitted for brevity):<br><br>Parent entity (container):<br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">@Entity<br>public class Parent {<br><br> @Id<br> @GeneratedValue(generator = "uuid")<br> @GenericGenerator(name = "uuid", strategy = "uuid2")<br> private String uuid;<br> @OneToMany(mappedBy = "parent")<br> private Set<FirstChild> firstChildren;<br><br>}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>Child (element) base class:<br><br>{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">@Entity<br>@DiscriminatorColumn(name = "discriminator")<br>@Inheritance(strategy = InheritanceType.JOINED)<br>public abstract class ChildBase {<br><br> public static final String DISCRIMINATOR_FIRST = "FIRST";<br><br> @Id<br> @GeneratedValue(generator = "uuid")<br> @GenericGenerator(name = "uuid", strategy = "uuid2")<br> private String uuid;<br> @ManyToOne<br> private Parent parent;<br><br>}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>And element itself:<br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">@Entity<br>@DiscriminatorValue(ChildBase.DISCRIMINATOR_FIRST)<br>public class FirstChild extends ChildBase {<br><br> private String firstChildField;<br><br>}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>This results in the folowing statements being generated:<br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">create table ChildBase (<br> discriminator varchar(31) not null,<br> uuid varchar(255) not null,<br> parent_uuid varchar(255),<br> primary key (uuid)<br> )<br><br>create table FirstChild (<br> firstChildField varchar(255),<br> uuid varchar(255) not null,<br> parent_uuid varchar(255),<br> primary key (uuid)<br> )</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>Note that</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">parent_uuid</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> column is present in both</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">ChildBase</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> and</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">FirstChild</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext">. Which to my understanding is incorrect, since</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">FirstChild</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> should only contain columns, defined in</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">FirstChild</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> itself. Also, removing</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">@OneToMany</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> makes this additional column disappear.<br><br>Furthermore Hibernate will actually use correct column when persisting data, but incorrect one when loading. Thus failing to find any rows. This behaviour can be seen it tests that provided.<br><br>As a workaround you can use</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">targetEntity = ChildBase.class</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> on</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> `</span> <span class="diffaddedchars" style="background-color:#ddfade;"> *</span> <span class="diffcontext">@OneToMany</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">`</span> <span class="diffaddedchars" style="background-color:#ddfade;">*</span> <span class="diffcontext"> but this results in ugly things and suboptimal SQL when working with this collection, so it is far from ideal.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br> <br></span> </td>
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