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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-8536" style="color: #3b73af; text-decoration: none">Re: @Embeddable ignores "length" attribute for @Column</a> </span>
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<p style="margin: 10px 0 0 0">Here the stripped-down example from the duplicate <a href="https://hibernate.atlassian.net/browse/HHH-9397" title="composite primary key containing foreign key, @EmbeddedId, @MapsId, @JoinColumn, and foreign key length" class="issue-link" data-issue-key="HHH-9397" style="color: #3b73af; text-decoration: none"></a></p>
<del>
HHH-9397
</del> again:
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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">
@Entity
<span class="code-keyword" style="color: #000091">public</span> class A {
@Id
@Column(name=<span class="code-quote" style="color: #009100">"AID"</span>, length=8)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> id;
}
@Embeddable
<span class="code-keyword" style="color: #000091">public</span> class B_Key <span class="code-keyword" style="color: #000091">implements</span> Serializable {
<span class="code-keyword" style="color: #000091">public</span> B_Key() {}
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> aId;
@Column(name = <span class="code-quote" style="color: #009100">"BB"</span>, length = 1)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> b;
<span class="code-comment" style="color: #808080">// Getters and setters, equals & hashCode
</span>}
@Entity
<span class="code-keyword" style="color: #000091">public</span> class B {
@EmbeddedId
<span class="code-keyword" style="color: #000091">private</span> B_Key id;
@MapsId(<span class="code-quote" style="color: #009100">"aId"</span>)
@ManyToOne
@JoinColumn(name = <span class="code-quote" style="color: #009100">"FK_A"</span>, nullable=<span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> A a;
}
</pre>
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<p style="margin: 10px 0 0 0">SchemaExport in Hibernate 4.3.6.FINAL will produce (using H2Dialect, but the same also occurs with other dialects)</p>
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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">
create table A (
AID varchar(8) not <span class="code-keyword" style="color: #000091">null</span>,
primary key (AID)
)
create table B (
FK_A varchar(255) not <span class="code-keyword" style="color: #000091">null</span>,
BB varchar(1) not <span class="code-keyword" style="color: #000091">null</span>,
primary key (FK_A, BB)
)
alter table B
add constraint FK_8u5iivujidu0ix4s4f9cw76ns
foreign key (FK_A)
references A
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<p style="margin: 10px 0 0 0">FK_A should be "varchar(8)", not "varchar(255)".</p>
<p style="margin: 10px 0 0 0">When compiling, Hibernate constructs two <tt>org.hibernate.mapping.Column</tt> objects for this FK_A column: one in the table B itself, and one in the table's <tt>ForeignKey</tt> constraint. The one in the <tt>ForeignKey</tt> is correct after <tt>Configuration.secondPassCompileForeignKeys()</tt>, while the one in the table never gets updated to the values from the referenced column in A. Adding the referencedColumnName does not help. If the name in the @JoinColumn is omitted, the <tt>Column</tt> in the table is created already with the correct length set, but is then of course not named "FK_A" but "a_AID".</p>
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