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Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 4 posts ] 
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 Post subject: Cannot control BLOB length for DB2 dialect
PostPosted: Tue Mar 12, 2013 1:19 pm 
Newbie

Joined: Wed Dec 05, 2012 5:12 am
Posts: 2
I'm trying to control the length of a BLOB column using the DB2 schema. My final goal is to have hibernatetool generate the SQL file for a 10M long BLOB column, and given the files pasted down here I always get a blob(255). What am I doing wrong?

build.xml (omitted less relevant parts):
Code:
<taskdef name="hibernatetool"
         classname="org.hibernate.tool.ant.HibernateToolTask"
         classpathref="toolslib" />

<target name="default">
<hibernatetool destdir="./generated">
<classpath>
  <path location="." />
  <path location="./classes" />
</classpath>

<configuration configurationfile="hibernate.cfg.xml"/>
<hbm2ddl export="false" outputfilename="sql.ddl"/>
</hibernatetool>


hibernate.cfg.xml:
Code:
<hibernate-configuration>
<session-factory>
  <property name="dialect">org.hibernate.dialect.DB2Dialect</property>
  <!-- Mapping files -->
  <mapping resource="DbContentStream.mapping.xml"/>
</session-factory>
</hibernate-configuration>


DbStreamImpl mapping:
Code:
<hibernate-mapping>

    <class name="DbContentStreamImpl"
           table="CONTENT_STREAM">
        <cache usage="read-write"/>
        <id name="id" type="java.lang.Long" access="field">
            <column name="id"/>
            <generator class="native">
            </generator>
        </id>

        <property name="content" type="blob" length="10485760">
            <column name="CONTENT"/>
        </property>
    </class>

</hibernate-mapping>


the resulting SQL file is (notice the length of the blob field):
Code:
create table CONTENT_STREAM (id bigint generated by default as identity, CONTENT blob(255), primary key (id));


Thanks in advance for any help


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 Post subject: Re: Cannot control BLOB length for DB2 dialect
PostPosted: Tue Mar 12, 2013 2:28 pm 
Newbie

Joined: Wed Dec 05, 2012 5:12 am
Posts: 2
Answering my own question, moving the length to the column fixes my problem:

DbStreamImpl mapping:
Code:
<hibernate-mapping>

    <class name="DbContentStreamImpl"
           table="CONTENT_STREAM">
        <cache usage="read-write"/>
        <id name="id" type="java.lang.Long" access="field">
            <column name="id"/>
            <generator class="native">
            </generator>
        </id>

        <property name="content" type="blob">
            <column name="CONTENT"  length="10485760"/>
        </property>
    </class>

</hibernate-mapping>


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 Post subject: Re: Cannot control BLOB length for DB2 dialect
PostPosted: Wed Mar 13, 2013 3:16 am 
Newbie

Joined: Wed Mar 13, 2013 3:06 am
Posts: 1
Location: Chenddu
This is so hard.


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 Post subject: Re: Cannot control BLOB length for DB2 dialect
PostPosted: Mon Apr 01, 2013 7:02 am 
Newbie

Joined: Mon Apr 01, 2013 6:58 am
Posts: 1
I don't have much knowledge about it but my friend is an expert in these field and runs a company also, so you can contact him and get the solution for your problem.
http://www.coffy.com


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