Hi,
I'm having problems running JDOQL queries that group by a variable. I
think the queries below are valid, but I would like to double check
this. If you agree that the queries are valid JDOQL, I will check the
TCK to add these queries to existing TCK tests or add new test cases. I
tried the queries with JPOX version 1.1.3 and with the nightly build
from Oct 27 (no difference). I will send a test case to reproduce the
problem to Erik and Andy, since I cannot attach archives here.
The class model is simple: pc class A has a field stringCol which is a
collection of strings and another field bCol which is a collection of
instances of class B.
The following query groups the class A instances by the strings in their
string collection:
Query q = pm.newQuery(A.class);
q.declareVariables("java.lang.String str");
q.setFilter("this.stringCol.contains(str)");
q.setGrouping("str");
q.setResult("str");
This results in an exception:
JDOUserException: Unable to find the field "str" in the candidate
class. It is possible that this field is a field in a subclass, but it
is illegal to reference fields directly when they are in a subclass.
I get a different exception when adding an aggregate to the result clause
q.setResult("str, count(this)");
JDOUserException: Unconstrained variable referenced: str
The behavior is different when iterating a collection of pc instances:
Query q = pm.newQuery(A.class);
q.declareVariables("model.B b");
q.setFilter("this.bCol.contains(b)");
q.setGrouping("b");
q.setResult("count(this), b");
This results in:
JDOUserException: The result clause has a field expression
"UnboundVariable "UNBOUND_B.ID"" that doesnt appear in the grouping. Any
result specification has to be present in the grouping when grouping is
specified.
Any help is appreciated. Thanks!
Regards Michael
--
Michael Bouschen [EMAIL PROTECTED] Engineering GmbH
mailto:[EMAIL PROTECTED] http://www.tech.spree.de/
Tel.:++49/30/235 520-33 Buelowstr. 66
Fax.:++49/30/2175 2012 D-10783 Berlin
