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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=eyJpIjoiZWVhZTU4MjVkMzVjNDViY2E0N2ExOWNhZTJjZGI5NDMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-13982?atlOrigin=eyJpIjoiZWVhZTU4MjVkMzVjNDViY2E0N2ExOWNhZTJjZGI5NDMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-141c4fd8-86ec-418c-9185-5f570a8c7735" 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=eyJpIjoiZWVhZTU4MjVkMzVjNDViY2E0N2ExOWNhZTJjZGI5NDMiLCJwIjoiaiJ9" 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=eyJpIjoiZWVhZTU4MjVkMzVjNDViY2E0N2ExOWNhZTJjZGI5NDMiLCJwIjoiaiJ9" 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 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-141c4fd8-86ec-418c-9185-5f570a8c7735" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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"> 5.2.18, 5.3.16, 5.4.14 </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-one-to-many-bug.zip </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"> 27/Apr/2020 00:27 AM </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"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0"> <span class="nobr"><a href="https://hibernate.atlassian.net/secure/attachment/49656/49656_hibernate-one-to-many-bug.zip" title="hibernate-one-to-many-bug.zip attached to HHH-13982" data-attachment-type="file" data-attachment-name="hibernate-one-to-many-bug.zip" data-media-services-type="file" data-media-services-id="c83a5f3c-3abf-418d-9fc7-871fe15e9b11" rel="noreferrer" style="color: #3b73af; text-decoration: none">hibernate-one-to-many-bug.zip<sup><img class="rendericon" src="cid:jira-generated-image-static-link_attachment_7-0a7d28b0-3b6e-4d7a-9fe1-4d44ce311a4b" height="7" width="7" align="absmiddle" alt="" border="0"></sup></a></span> Hi everyone. Here are some entities to demonstrate this (getters/setters omitted for brevity):</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Parent entity (container):</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>Parent {
@Id
@GeneratedValue(generator = <span class="code-quote" style="color: #009100">"uuid"</span>)
@GenericGenerator(name = <span class="code-quote" style="color: #009100">"uuid"</span>, strategy = <span class="code-quote" style="color: #009100">"uuid2"</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> uuid;
@OneToMany(mappedBy = <span class="code-quote" style="color: #009100">"parent"</span>)
<span class="code-keyword" style="color: #000091">private</span> Set<FirstChild> firstChildren;
}
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Child (element) base class:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@DiscriminatorColumn(name = <span class="code-quote" style="color: #009100">"discriminator"</span>)
@Inheritance(strategy = InheritanceType.JOINED)
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">abstract</span> <span class="code-keyword" style="color: #000091">class </span>ChildBase {
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> <span class="code-keyword" style="color: #000091">final</span> <span class="code-object" style="color: #910091">String</span> DISCRIMINATOR_FIRST = <span class="code-quote" style="color: #009100">"FIRST"</span>;
@Id
@GeneratedValue(generator = <span class="code-quote" style="color: #009100">"uuid"</span>)
@GenericGenerator(name = <span class="code-quote" style="color: #009100">"uuid"</span>, strategy = <span class="code-quote" style="color: #009100">"uuid2"</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> uuid;
@ManyToOne
<span class="code-keyword" style="color: #000091">private</span> Parent parent;
}
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">And element itself:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@DiscriminatorValue(ChildBase.DISCRIMINATOR_FIRST)
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>FirstChild <span class="code-keyword" style="color: #000091">extends</span> ChildBase {
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> firstChildField;
}
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This results in the folowing statements being generated:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
create table ChildBase (
discriminator varchar(31) not <span class="code-keyword" style="color: #000091">null</span>,
uuid varchar(255) not <span class="code-keyword" style="color: #000091">null</span>,
parent_uuid varchar(255),
primary key (uuid)
)
create table FirstChild (
firstChildField varchar(255),
uuid varchar(255) not <span class="code-keyword" style="color: #000091">null</span>,
parent_uuid varchar(255),
primary key (uuid)
)
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Note that `parent_uuid` column is present in both `ChildBase` and `FirstChild`. Which to my understanding is incorrect, since `FirstChild` should only contain columns, defined in `FirstChild` itself. Also, removing `@OneToMany` makes this additional column disappear.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">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.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">As a workaround you can use `targetEntity = ChildBase.class` on `@OneToMany` but this results in ugly things and suboptimal SQL when working with this collection, so it is far from ideal.</p> </td>
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