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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: 10px 0 0 0; margin-top: 0">In the meantime I found a way to solve the problem for substring function missing on Oracle by this approach. It saves this architecture for me.</p> <p style="margin: 10px 0 0 0">I created a hbm file that contains this content:</p> <p style="margin: 10px 0 0 0"><?xml version="1.0"?><br> <!DOCTYPE hibernate-mapping PUBLIC<br> "-//Hibernate/Hibernate Mapping DTD 3.0//EN"<br> "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" ><br> <hibernate-mapping package="org.generic"><br> <database-object><br> <create><br> CREATE OR REPLACE FUNCTION substring (strIn clob, StartPos integer, Len integer) RETURN varchar2 IS<br> BEGIN</p> <p style="margin: 10px 0 0 0">RETURN substr( strin, startpos, len );</p> <p style="margin: 10px 0 0 0">EXCEPTION<br> WHEN OTHERS THEN<br> RETURN NULL;</p> <p style="margin: 10px 0 0 0">END substring; <br> </create><br> <drop></drop><br> <dialect-scope name="org.hibernate.dialect.Oracle10gDialect" /><br> <dialect-scope name="org.hibernate.dialect.Oracle12cDialect" /><br> </database-object><br> </hibernate-mapping></p> <p style="margin: 10px 0 0 0">So at setup time a function only on oracle is created that maps to the substr function available on Oracle.It works fine so far. However for the sake of maintainability a @formula annotation that allows to specify the database dependend string would be much better. Currently you cannot see the dependency to the database specific function looking at the annotation code. </p> <p style="margin: 10px 0 0 0">Imho a hint like this at the javadoc of the @formula annotation could help to make use of it.</p> </td>
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