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Using hibernate Tools to generate Sql Script
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created by <a href="https://community.jboss.org/people/chetansh">Chetan Shinde</a> in <i>JBoss Tools</i> - <a href="https://community.jboss.org/message/797369#797369">View the full discussion</a>
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<div class="jive-rendered-content"><p>We wanted to generate SQL Script (DDL) from POJO class which are Hibernate Annotated. I have tried using both <span style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">hibernate3 maven plugin as well as with the Schema Exporter. </span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">Now this class also has a Sequecne Generator defined, and I was expecting that there would be a Sequence script generated for it as well. <br/></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This is what the code looked like in the Entity with respect to the Sequence, the allocationSize here is defined as 50, I have tried using all different sizes.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@Entity @SequenceGenerator(name="sessionInfoIdSeq", sequenceName="SESSIONINFO_ID_SEQ", allocationSize=50)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public class SessionInfo {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><code><span class="lit">@Id</span><span class="pln">  </span><span class="lit">@GeneratedValue</span><span class="pun">(</span><span class="pln">strategy </span><span class="pun">=</span><span class="pln"> </span><span class="typ">GenerationType</span><span class="pun">.</span><span class="pln">AUTO</span><span class="pun">,</span><span class="pln"> generator</span><span class="pun">=</span><span class="str">"sessionInfoIdSeq"</span><span class="pun">)</span><span class="pln"><br/></span><span class="kwd">private</span><span class="pln"> </span><span class="typ">Integer</span><span class="pln">          id</span><span class="pun">;</span></code></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span class="pun">I am using following JARS:</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>I am using the following jars : hibernate-tools - 3.2.4.GA, hibernate-core - 3.6.1.Final, hibernate-entitymanager - 3.6.1.Final, hibernate-validator - 4.1.0.Final, hibernate-validator-legacy - 4.0.2.GA and DB related jars.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Now when I tried debugging the code using the SchemaExporter example I found that the class in hibernate-core jar was getting called for generating the sequence text.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The problem is that it was only creating create sequence SESSIONINFO_ID_SEQ;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>At line 146 on SequenceGenerator.java it was using </p><p><em style="font-size: 12.0pt; font-family: 'Times New Roman','serif';">String[] ddl =</em><span style="font-size: 12.0pt; font-family: 'Times New Roman','serif';"> <em>dialect.getCreateSequenceStrings(sequenceName) from the Dialect class which happened to be deprecated.</em></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This method implementation was </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="background: white;"> <em>public String[]  getCreateSequenceString(String sequenceName) {</em></p><p style="background: white;"><em> </em></p><p style="background: white;"><em> return "create sequence " + sequenceName; //starts with 1, implicitly</em></p><p style="background: white;"><em> </em></p><p style="background: white;"><em> }  </em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-size: 12.0pt; font-family: 'Times New Roman','serif';"><em>The Dialect API said instead to usefollowing method.<br/></em></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>protected String  getCreateSequenceString(String sequenceName, int initialValue, int incrementSize) throws MappingException { </p><p>                               if ( supportsPooledSequences() ) { </p><p>                                              return getCreateSequenceString( sequenceName ) + " start with " + initialValue + " increment by " + incrementSize;</p><p>                               } </p><p>                               throw new MappingException( "Dialect does not support pooled sequences" );</p><p>               }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I checked the latest APi of the hibernate-core and it too uses the deprecated method.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any inputs on this would be appreciated.  Do I need to raise a JIRA?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have attached a sample example that I used to  generate the Code, SchemaExporter.7z.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,</p><p>Chetan</p></div>
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