Hi everyone,
I have used Hibernate with BEA Weblogic 3.1 and I have not had any problems.
Now I'm passing to BEA 4.0 and I'm starting to have some problems.

Using the same war file, with BEA 4.0 I have the following Exception:

org.hibernate.QueryException: undefined alias: TConfCodecPK [select TConfCodecPK.subtype FROM hibernate.classes.TConfCodec where confURI = 'sip:conf1239010359177@telecomitalia.it' and policy = 'allowed']

TConfCodec is the java class that maps the sql table, instead TConfCodecPK is the composite-id.

subtype is an element of composite-id TConfCodecPK. To read it from the table using BEA 3.1 I have had no problems, but now using BEA 4.0 I have it.
I don't know if I'm doing something wrong.
Please, help me

Here is described how they are composed

TConfCodec java class
public class TConfCodec {
private String media_label;
private String policy;
private String name;

private TConfCodecPK tConfCodecPK;

public TConfCodec() {
}

public TConfCodec(String confURI, String media_type,String media_label,String subtype,String policy,String name) {
this.name = name;
this.media_label = media_label;
this.policy = policy;

tConfCodecPK = new TConfCodecPK(confURI, media_type,subtype);
}


public String getMedia_label() {
return media_label;
}

public void setMedia_label(String media_label) {
this.media_label = media_label;
}


public String getPolicy() {
return policy;
}

public void setPolicy(String policy) {
this.policy = policy;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}


public TConfCodecPK getTConfCodecPK() {
return tConfCodecPK;
}

public void setTConfCodecPK(TConfCodecPK confCodecPK) {
tConfCodecPK = confCodecPK;
}

public String getConfURI() {
return this.tConfCodecPK.getConfURI();
}

public void setConfURI(String confURI) {
this.tConfCodecPK.setConfURI(confURI);
}

public String getMedia_type() {
return this.tConfCodecPK.getMedia_type();
}

public void setMedia_type(String media_type) {
this.tConfCodecPK.setMedia_type(media_type);
}

public String getSubtype() {
return this.tConfCodecPK.getSubtype();
}

public void setSubtype(String subtype) {
this.tConfCodecPK.setSubtype(subtype);
}
}

TConfcodecPK
public class TConfCodecPK implements Serializable {
private String confURI;
private String media_type;
private String subtype;

public TConfCodecPK()
{
}

public TConfCodecPK(String confURI, String media_type, String subtype)
{
this.confURI = confURI;
this.media_type = media_type;
this.subtype = subtype;
}

public String getConfURI()
{
return confURI;
}
public void setConfURI(String confURI)
{
this.confURI = confURI;
}
public String getMedia_type()
{
return media_type;
}
public void setMedia_type(String media_type)
{
this.media_type = media_type;
}
public String getSubtype()
{
return subtype;
}
public void setSubtype(String subtype)
{
this.subtype = subtype;
}
}

TConfCodec.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="hibernate.classes.TConfCodec" table="t_conf_codecs">
<composite-id name="TConfCodecPK"
class="hibernate.classes.TConfCodecPK">
<key-property name="confURI"/>
<key-property name="media_type"/>
<key-property name="subtype"/>
</composite-id>

<property name="media_label"/>
<property name="policy"/>
<property name="name"/>

</class>
</hibernate-mapping>

table t_conf_codecs
CREATE TABLE `t_conf_codecs` (
`confURI` varchar(100) NOT NULL,
`media_type` varchar(10) NOT NULL,
`media_label` varchar(15) NOT NULL,
`subtype` varchar(16) NOT NULL,
`policy` enum ('allowed','disallowed') NOT NULL DEFAULT 'allowed',
`name` varchar(10) NOT NULL,
/* Keys */
PRIMARY KEY (`confURI`, `media_type`, `subtype`)
)

Maybe it's a problem with case-sensitivity. In your class you didn't capitalize the pk-attribute ("tConfCodecPK").
Make sure that you allways use the right case, so you have to change your mapping to "<composite-id name="tConfCodecPK"..." and your query to "select tConfCodecPK.subtype FROM...".