[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2966) Create table fails for SchemaExport when a column is mapped again with insert="false" update="false"

[Varghese C V (JIRA)]

Create table fails for SchemaExport when a column is mapped again with insert="false" update="false"
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                 Key: HHH-2966
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2966
             Project: Hibernate3
          Issue Type: Bug
          Components: core
    Affects Versions: 3.2.5
         Environment: Hibernate-3.2.5, Hsqldb-1.8.0.7
            Reporter: Varghese C V
         Attachments: org.hibernate.mapping.Table.patch, repeated-column-mapping-test-case.zip

AbstractCustomer mapping :
<hibernate-mapping>
    <class name="org.hibernate.test.schemaexport.AbstractCustomer" abstract="true">
        <id name="id" type="java.lang.String">
            <column name="ID" length="20" />
            <generator class="assigned" />
        </id>
        <property name="countryCode" type="java.lang.String">
            <column name="COUNTRY_CODE" length="2" />
        </property>
    </class>
</hibernate-mapping>

CorporateCustomer mapping :
<hibernate-mapping>
    <union-subclass name="org.hibernate.test.schemaexport.CorporateCustomer" extends="org.hibernate.test.schemaexport.AbstractCustomer">
        <many-to-one name="country" class="org.hibernate.test.schemaexport.Country" insert="false" update="false">
            <column name="COUNTRY_CODE" length="2" />
        </many-to-one>
    </union-subclass>
</hibernate-mapping>

For these mappings, the ddl generated by SchemaExport contains the COUNTRY_CODE twice.
Generated Sql
create table CorporateCustomer (
        ID varchar(20) not null,
        COUNTRY_CODE varchar(2),
        COUNTRY_CODE varchar(2),
        primary key (ID)
    )

I have attached a test case that reproduces this. 
I have also attached a patch to org.hibernate.mapping.Table to fix this problem. The patch is simply to skip the duplicate columns when the sql is being generated.

Please do verify.

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