Not sure which DB you are using, but for example I've noticed that HSQL
seems to not parse the entire statement string upfront which can lead to
issue like this.  It leaves parsing certain pieces relative to its
internal working datasets; if there are no results in those working
sets, you get no errors.  Specifically I have seen this with correlated
sub-queries.


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Max
Rydahl Andersen
Sent: Friday, January 28, 2005 9:56 AM
To: Hibernate development
Subject: [Hibernate] Criteria curiosity...

Hi,

while working on Critiera i "bumped" into this funny behavior:

Doing the following Critieria on an empty db gives no error:

s.createCriteria(Student.class)
                        .add( Expression.like("name", "Gavin",
MatchMode.START) )
                        .addOrder( Order.asc("name") )
                        .createCriteria("enrolments", "e")
                                .addOrder( Order.desc("year") )
                                .addOrder( Order.desc("semester") )
                        .createCriteria("course")
                                .addOrder( Order.asc("description") )
                                .setProjection( Expression.projection()
                                        .add(
Expression.property("this.name") )
                                        .add(
Expression.property("e.year") )
                                        .add(
Expression.property("e.semester") )
                                        .add(
Expression.property("courseCode") )
                                        .add(
Expression.property("description") )
                                )
                        .uniqueResult();

but when data is available i get an error saying
that courseCode is not available on Student - which is totally correct.

(using explicit criteria aliases solves it)

I'm just wondering why this is not discovered when the query gives no  
result - it should still be able to tell
that courseCode is not on Student - is this expected behavior ?

-- 
Max Rydahl Andersen
callto://max.rydahl.andersen

Hibernate
[EMAIL PROTECTED]
http://hibernate.org

JBoss Inc
[EMAIL PROTECTED]
http://jboss.com


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