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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-10409" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-59c9cbe7-ed8e-41c5-8827-e5b2b6878d53" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10409" style="color: #3b73af; text-decoration: none">HHH-10409</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">Issue Type:</th>
<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="cid:jira-generated-image-avatar-59c9cbe7-ed8e-41c5-8827-e5b2b6878d53" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.0.6 </td>
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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"> Unassigned </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">Attachments:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Address.java, CollectionWithHibernate.java, hibernate.cfg.xml, Student(Version1).java, Student(version 2).java </td>
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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"> 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: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 03/Jan/2016 14:37 PM </td>
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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"> Hibernate version: 5.0.6 <br> Database: derby </td>
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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"> hibernate </td>
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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="Adi1817" id="email_Adi1817" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Adi1817" style="color:#6c797f;; color: #3b73af; text-decoration: none">Adithya Indarapu</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"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Hi,</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Am beginner to hibernate, while i am practicing i found a bug. Following is the description to recreate the bug.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Note: <property name="hbm2ddl.auto">create</property></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">1. Create a Address class to store student Address(Attached the Address class).<br> 2. Create a model class for Student in which we will use @ElementCollection annotation to for the Collection to store list of addresses of a student.(Attached Student class version 1).<br> 3. Create a class with main method in which create instance for Address Class and store two addresses of a student into Student class instance.<br> 4. write code to save the Student object into the database.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The above steps will create two tables in database 1. Student 2. Student_address <br> Now use @JoinTable(name="StudentAddress") above to the member variable address in Student model class(Attached Student class version 2).Now run the main method to store the Student object</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">when we run the main method we will get error with the following log</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Hibernate: alter table Student_address drop constraint FKmdtlf7dpg8k2tk4yjr53o37nx<br> Hibernate: drop table Student<br> Jan 03, 2016 4:20:36 PM org.hibernate.tool.hbm2ddl.SchemaExport perform<br> ERROR: HHH000389: Unsuccessful: drop table Student<br> Jan 03, 2016 4:20:36 PM org.hibernate.tool.hbm2ddl.SchemaExport perform<br> ERROR: Operation 'DROP CONSTRAINT' cannot be performed on object 'SQL160103154527370' because CONSTRAINT 'FKFWCK4FON84BM0XJL8ABWGB2HP' is dependent on that object.<br> Hibernate: drop table Student_address<br> Hibernate: create table Student (roll integer not null, name varchar(255), primary key (roll))<br> Jan 03, 2016 4:20:36 PM org.hibernate.tool.hbm2ddl.SchemaExport perform<br> ERROR: HHH000389: Unsuccessful: create table Student (roll integer not null, name varchar(255), primary key (roll))<br> Jan 03, 2016 4:20:36 PM org.hibernate.tool.hbm2ddl.SchemaExport perform<br> ERROR: Table/View 'STUDENT' already exists in Schema 'APP'.<br> Hibernate: create table Student_address (Student_roll integer not null, user_city varchar(255), user_pincode varchar(255), user_state varchar(255), user_street varchar(255))<br> Hibernate: alter table Student_address add constraint FKmdtlf7dpg8k2tk4yjr53o37nx foreign key (Student_roll) references Student<br> Jan 03, 2016 4:20:36 PM org.hibernate.tool.hbm2ddl.SchemaExport execute<br> INFO: HHH000230: Schema export complete<br> Hibernate: insert into Student (name, roll) values (?, ?)<br> Jan 03, 2016 4:20:36 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions<br> WARN: SQL Error: 20000, SQLState: 23505<br> Jan 03, 2016 4:20:36 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions<br> ERROR: The statement was aborted because it would have caused a duplicate key value in a unique or primary key constraint or unique index identified by 'SQL160103154527370' defined on 'STUDENT'.<br> Jan 03, 2016 4:20:36 PM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release<br> INFO: HHH000010: On release of batch it still contained JDBC statements<br> Jan 03, 2016 4:20:36 PM org.hibernate.internal.SessionImpl$5 mapManagedFlushFailure<br> ERROR: HHH000346: Error during managed flush <span class="error">[could not execute statement]</span><br> Exception in thread "main" org.hibernate.exception.ConstraintViolationException: could not execute statement</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">My Analysis:<br> In the Model class Student we have used JoinTable annotation and changed the table name to be created for foreign key(version 2 of Student class). As per hibernate.cfg.cml what ever that are mentioned in <mapping> will be dropped and will be created, so (in Student class version 2) hibernate will try to delete Student table , which will fail because there is foreign key relation between Student and Student_address table.<br> So before deleting a table Student the foreign key relation to the Student_address need to be deleted. </p> </td>
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