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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-10420" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-2069f2d6-876b-424f-ba3c-c865d2f4ec7a" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10420" style="color: #3b73af; text-decoration: none">HHH-10420</a> </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">Change By:</th>
<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="abeani" id="email_abeani" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=abeani" style="color:#6c797f;; color: #3b73af; text-decoration: none">Andreas Benneke</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">Our schema export used to work perfectly with Hibernate 4.x but fails after update to 5.0.<br><br>It turned out that the new {{SchemaMigratorImpl}} tries to create the foreign keys after the tables of a schema are complete. This however fails if those keys refer to tables in a different schema which have not yet been processed.<br><br>The old {{Configuration.generateSchemaUpdateScriptList}} created the foreign keys after the tables from *all* schema had been processed.<br><br>We created a test project on https://github.com/abenneke/sandbox/tree/master/hibernate-schema where<br><br>{{FirstParent}} from schema {{FIRST}} has children from {{SecondChild}} from schema {{SECOND}}<br>and<br>{{SecondParent}} from schema {{SECOND}} has children from {{FirstChild}} from schema {{FIRST}}<br><br>(both directions to make the creation order irrelevant, but note that there is no circle)<br><br>SchemaExport of Hibernate 4 created those tables this way:<br>{code}<br>create table FIRST.FirstChild (id varchar(255) not null, parent_id varchar(255), primary key (id))<br>create table FIRST.FirstParent (id varchar(255) not null, primary key (id))<br>create table</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> FIRST</span> <span class="diffaddedchars" style="background-color:#ddfade;"> SECOND</span> <span class="diffcontext">.SecondChild (id varchar(255) not null, parent_id varchar(255), primary key (id))<br>create table</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> FIRST</span> <span class="diffaddedchars" style="background-color:#ddfade;"> SECOND</span> <span class="diffcontext">.SecondParent (id varchar(255) not null, primary key (id))<br>alter table FIRST.FirstChild add constraint FK...</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">.</span> <span class="diffcontext"> foreign key (parent_id) references</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> FIRST</span> <span class="diffaddedchars" style="background-color:#ddfade;"> SECOND</span> <span class="diffcontext">.SecondParent<br>alter table</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> FIRST</span> <span class="diffaddedchars" style="background-color:#ddfade;"> SECOND</span> <span class="diffcontext">.SecondChild add constraint FK... foreign key (parent_id) references FIRST.FirstParent<br>{code}<br><br>whereas Hibernate 5 now fails with <br>{code}<br>create table FIRST.FirstChild (id varchar(255) not null, parent_id varchar(255), primary key (id))<br>create table FIRST.FirstParent (id varchar(255) not null, primary key (id))<br>create table FIRST.SecondChild (id varchar(255) not null, parent_id varchar(255), primary key (id))<br>alter table FIRST.FirstChild add constraint FK... foreign key (parent_id) references SECOND.SecondParent<br>HHH000389: Unsuccessful: alter table FIRST.FirstChild add constraint FK... foreign key (parent_id) references SECOND.SecondParent<br>{code}<br><br>Please note also that {{hibernate.hbm2ddl.auto}} with {{create}} simply reports this error and continues and {{update}} fails with a {{SchemaManagementException: Unable to execute schema management to JDBC target}}</span> </td>
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