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    <p>Bogdan, thanks for posting this. I had a similar problem with case-sensitive table names for Unix/Windows portability using Hibernate/JPA/MySQL on Linux.</p> <p>Like you, I set out to bind my table names as all lower-case by configuring a custom NamingStrategy in my META-INF/persistence.xml file:</p> <pre><code>&lt;property name="hibernate.ejb.naming_strategy" value="my.package.LowerCaseNamingStrategy" /&gt; </code></pre> <p>I got the same exception: org.hibernate.DuplicateMappingException: Same physical table name... Through using the debugger, I had an epiphany that maybe <strong>I wasn't using DefaultNamingStrategy to begin with! So I changed my base class to org.hibernate.cfg.EJB3NamingStrategy</strong>. This is more appropriate when using JPA Annotations, I believe! Here was my final NamingStrategy:</p> <pre><code>package my.package; import org.apache.commons.lang.StringUtils; import org.hibernate.cfg.EJB3NamingStrategy; public class LowerCaseNamingStrategy extends EJB3NamingStrategy { @Override public String classToTableName(String className) { return StringUtils.lowerCase(super.classToTableName(className)); } @Override public String collectionTableName(String ownerEntity, String ownerEntityTable, String associatedEntity, String associatedEntityTable, String propertyName) { return StringUtils.lowerCase(super.collectionTableName(ownerEntity, ownerEntityTable, associatedEntity, associatedEntityTable, propertyName)); } @Override public String logicalCollectionTableName(String tableName, String ownerEntityTable, String associatedEntityTable, String propertyName) { return StringUtils.lowerCase(super.logicalCollectionTableName(tableName, ownerEntityTable, associatedEntityTable, propertyName)); } @Override public String tableName(String tableName) { return StringUtils.lowerCase(super.tableName(tableName)); } } </code></pre> <p>PS the previous solution by dursun did not work for me.</p>
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    1. POWhat does "org.hibernate.DuplicateMappingException" error mean?
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    1. USBrock Adams
    1. USSteve Jones
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    1. COI think I solved the problem by using ImprovedNamingStrategy. This took care of everything: lowercase names+underscores; I also had an epiphany: I realized I want full control of what's happening so I ditched the JPA/annotation stuff and switched to hibernate mappings. I've been happy ever since :)
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