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Today's Topics:
1. Postgres arrays (Mike Traum)
2. Re: Postgres arrays (Mike Traum)
3. ReadAllQuery fetch all (Martin Janda)
4. IndirectMap.containsKey leads to Exception because DISTINCT
on @Lob-Field (Hans Harz)
5. Re: ReadAllQuery fetch all (Tom Ware)
6. Re: how can I reference a foreign key in ejbql where
condition? (James Sutherland)
7. Re: How eclipselink handles Sequences? (James Sutherland)
----------------------------------------------------------------------
Message: 1
Date: Mon, 16 Nov 2009 09:31:00 -0800
From: Mike Traum <Mike.Traum@xxxxxxxx>
Subject: [eclipselink-users] Postgres arrays
To: EclipseLink User Discussions <eclipselink-users@xxxxxxxxxxx>
Message-ID: <4B018C54.502@xxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
I'm trying to get a mapping for postgres arrays working. I'm using a
Converter and thus far (without a lot of testing), inserting an array
seems to work fine. But, when reading that array, eclipselink (1.2)
throws the following exception before we even get to the Converter:
java.lang.ClassCastException: [D cannot be cast to [Ljava.lang.Object;
at
org.eclipse.persistence.mappings.structures.ObjectRelationalDataTypeDescriptor.buildArrayObjectFromArray(ObjectRelationalDataTypeDescriptor.java:326)
...
The problem seems to be that eclipselink is attempting to cast
java.sql.Array.getArray() to Object[], but postgres returns an array of
primitives. This seems like an eclipselink bug, no? Any idea for a
workaround?
Thanks,
Mike
------------------------------
Message: 2
Date: Mon, 16 Nov 2009 13:30:31 -0800
From: Mike Traum <Mike.Traum@xxxxxxxx>
Subject: [eclipselink-users] Re: Postgres arrays
To: EclipseLink User Discussions <eclipselink-users@xxxxxxxxxxx>
Message-ID: <4B01C477.1090207@xxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I seem to have worked out my issues. I upgraded the jdbc driver from
postgresql-8.2-506.jdbc3.jar to postgresql-8.4-701.jdbc4.jar and
postgres now returns the boxed types instead of the primitive arrays.
mike
Mike Traum wrote:
Hi,
I'm trying to get a mapping for postgres arrays working. I'm using a
Converter and thus far (without a lot of testing), inserting an array
seems to work fine. But, when reading that array, eclipselink (1.2)
throws the following exception before we even get to the Converter:
java.lang.ClassCastException: [D cannot be cast to [Ljava.lang.Object;
at
org.eclipse.persistence.mappings.structures.ObjectRelationalDataTypeDescriptor.buildArrayObjectFromArray(ObjectRelationalDataTypeDescriptor.java:326)
...
The problem seems to be that eclipselink is attempting to cast
java.sql.Array.getArray() to Object[], but postgres returns an array
of primitives. This seems like an eclipselink bug, no? Any idea for a
workaround?
Thanks,
Mike
------------------------------
Message: 3
Date: Mon, 16 Nov 2009 23:02:08 +0100
From: Martin Janda <jandam@xxxxxxxxxx>
Subject: [eclipselink-users] ReadAllQuery fetch all
To: EclipseLink Users <eclipselink-users@xxxxxxxxxxx>
Message-ID: <5B79C16E-9C64-4786-B33B-4A5CD86B6E61@xxxxxxxxxx>
Content-Type: text/plain; charset=us-ascii; format=flowed; delsp=yes
Hello,
can you help me? please. I have Entity with lazy mappings. I need
to read all Entity attributes Eager&Lazy trough ReadAllQuery
(ScrollableCursor) and detach them. I need to use Entities after
closing EM and EMF. So they can no longer fetch lazy mappings.
I need to work with selected Entities from JTable (needs lazy) in
another context (needs all attributes including lazy mappings).
Is there any way how to do it in EclipseLink 1.1.3 Java SE, I prefer
annotations or direct methods in EM/EMF/UOW.
Thank you very much.
Martin
PS Sorry for my english
------------------------------
Message: 4
Date: Tue, 17 Nov 2009 14:58:09 +0100
From: Hans Harz <hansharz_eclipselink@xxxxxx>
Subject: [eclipselink-users] IndirectMap.containsKey leads to
Exception because DISTINCT on @Lob-Field
To: eclipselink-users@xxxxxxxxxxx
Message-ID: <1852227376@xxxxxx>
Content-Type: text/plain; charset=iso-8859-15
Hi all,
I encountered a problem in our application. Maybe some of you can help me.
Using
- EclipseLink 1.1.3
- Given a class A with a @Lob Field String stringValue;
- Given class B with
@ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE})
@MapKey(name = "field")
private Map<AType, A> As;
When I call As.containsKey(someAType) on the lazy loaded map
Then a Query with a DISTINCT is created.
SELECT DISTINCT ...,t0.stringValue,...
this leads to the following exception on oracle databases (and we made a test with DB2 and it also fails)
ORA-00932: inconsistent datatypes: expected - got CLOB
This is because DISTINCT queries are not allowed on BLOB or CLOB fields.
Is this expected behavior?
Did we miss a restriction of eclipselink?
Is there a way to not generate the query without DISTINCT?
In toplink we never had this problem, so it seems that toplink did not generate the DISTINCT.
Here is the Stack Trace.
regards,
Hans
org.eclipse.persistence.exceptions.DatabaseException: Internal Exception: java.sql.SQLException: ORA-00932: inconsistent datatypes: expected - got CLOB Error Code: 932 Call: SELECT DISTINCT t1.ID, t1.EXPLICITVERSION, t1.STRINGVALUE, t1.UUID, .....
org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:332)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:667)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:512)
org.eclipse.persistence.sessions.server.ServerSession.executeCall(ServerSession.java:536)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:205)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:191)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:262)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:599)
org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRowsFromTable(ExpressionQueryMechanism.java:2518)
org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2476)
org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:481)
org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:928)
org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:664)
org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:889)
org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:458)
org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2244)
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1181)
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1165)
org.eclipse.persistence.mappings.ManyToManyMapping.extractResultFromBatchQuery(ManyToManyMapping.java:231)
org.eclipse.persistence.internal.indirection.BatchValueHolder.instantiate(BatchValueHolder.java:58)
org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:71)
org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:161)
org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:230)
org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
org.eclipse.persistence.indirection.IndirectMap.buildDelegate(IndirectMap.java:110)
org.eclipse.persistence.indirection.IndirectMap.getDelegate(IndirectMap.java:316)
org.eclipse.persistence.indirection.IndirectMap.containsKey(IndirectMap.java:165)
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------------------------------
Message: 5
Date: Tue, 17 Nov 2009 09:09:44 -0500
From: Tom Ware <tom.ware@xxxxxxxxxx>
Subject: Re: [eclipselink-users] ReadAllQuery fetch all
To: EclipseLink User Discussions <eclipselink-users@xxxxxxxxxxx>
Message-ID: <4B02AEA8.5020103@xxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Martin,
If you are using JPQL, JPQL allows you to specify fetch joins that will cause
relationships to be automatically loaded. Have you tried that?
If you are using EclipseLink expressions, there is an addJoinedAttribute
method you can use on your query.
-Tom
Martin Janda wrote:
Hello,
can you help me? please. I have Entity with lazy mappings. I need to
read all Entity attributes Eager&Lazy trough ReadAllQuery
(ScrollableCursor) and detach them. I need to use Entities after closing
EM and EMF. So they can no longer fetch lazy mappings.
I need to work with selected Entities from JTable (needs lazy) in
another context (needs all attributes including lazy mappings).
Is there any way how to do it in EclipseLink 1.1.3 Java SE, I prefer
annotations or direct methods in EM/EMF/UOW.
Thank you very much.
Martin
PS Sorry for my english
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------------------------------
Message: 6
Date: Tue, 17 Nov 2009 06:38:39 -0800 (PST)
From: James Sutherland <jamesssss@xxxxxxxxx>
Subject: Re: [eclipselink-users] how can I reference a foreign key in
ejbql where condition?
To: eclipselink-users@xxxxxxxxxxx
Message-ID: <26391063.post@xxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=us-ascii
Why are you using a ReadAllQuery, if you are using JPA and JPQL? Just create
a JPA Query,
Query query = em.createQuery("Select Object(entity) from ChairImpl entity
where entity.institute=:institute");
query.setParameter("institute", new Integer(10));
List result = query.getResultList();
If you need to use a ReadAllQuery with EJBQL then you cannot use
addArgumentValue(), as it seems to have issues, you will need to execute it
as a parametrized query.
i.e.
ReadAllQuery query = new ReadAllQuery(ChairImpl.getClass());
query.setEJBQLString("Select Object(entity) from ChairImpl entity where
entity.institute=?1");
query.addArgument("1");
EntityManager em = this.getEntityManager();
Query query = JpaHelper.createQuery(query, em);
query.setParameter("1", new Integer(10));
List result = query.getResultList();
zamek42 wrote:
hello James,
thx for response.
James Sutherland wrote:
Are you using JPA? EJBQL/JPQL is normally used from JPA using the JPA
Query interface.
For using EJBQL/JPQL with an EclipseLink ReadAllQuery you need to set the
argument names and values.
i.e.
query.setEJBQLString("Select OBJECT(sg) from sg sg where sg.foreignField
= ?1");
query.addArgument("1");
query.addArgumentValue(id);
I get filter criteria from smartgwt, which is a gwt frontend. I need ejbql
because it sends filtering criterias in a Map<String,String>. I don't want
to use an unecessary string parser, simply put criteria text into the sql.
For a test I make a simple query:
ReadAllQuery query = new ReadAllQuery(ChairImpl.getClass());
query.setEJBQLString("Select Object(entity) from ChairImpl entity where
entity.institute=?1");
query.addArgument("1");
query.addArgumentValue(new Integer(10));
EntityManager em = this.getEntityManager();
List result = JpaHelper.createQuery(query, em).getResultList();
this throws an error:
java.lang.IllegalStateException: Query argument 1 not found in the list of
parameters provided during query execution.
ChairImpl has an attribute named institute:
@ManyToOne
@JoinColumn(nullable=false)
public InstituteImpl getInstitute() {
return institute;
}
public void setInstitute(InstituteImpl institute) {
this.institute = institute;
}
What do I mistake?
Perhaps JpaHelper.createQuery is unecessary? How can I use readAllQuery
from glassfish directly?
thx
Zamek
-----
http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland
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