Nabble - EclipseLink - Users

Re: Failed insert results in invalid cache state

2009-11-20T07:32:26Z

James,
This is a response to a previous comment you made. I had to drop this research for projects but now i'm back on it. I wanted to follow up with something you mentioned:

(EclipseLink will never generate duplicates).

What type of ID generator are you referring to? And, how is the guarantee made (in a clustered environment)? I can only think of a few ways:

1) A database table manages the sequences (select from table, auto-update to next value)
2) EclipseLink validates the value does not already exist as an ID in the table prior to assigning it to the object. However this doesn't guarantee that the ID won't be assigned by another process elsewhere, inserting into the same table.
3) In the above instance, a sequence manager manages state across all instance of EclipseLink in use.

James Sutherland wrote:

This is pretty advanced stuff, so you may want to reconsider you reasons for trying to do this in the first place. You might want to instead catch the exception in your app and retry the whole transaction, or avoid having duplicate sequence numbers in the first place (EclipseLink will never generate duplicates).

To get your exception handler to work, you can't create a copy, as it violates object identity. You need to reset the object's pk to null. You could use the descriptor to do this generically.

Object value = builder.getSequenceMapping().getAttributeValue(null, session);
builder.getSequenceMapping().setAttributeValueInObject(dup, value);

batch-writing mode Oracle-JDBC leads to integrity constraint exception when a class contains lob field

2009-11-19T09:04:14Z

Hi all,

I encountered another problem with Lob fields. Do you think this is a Bug in EclipseLink, Oracle or expected behavior.

Given:
A Test that
- open a transaction
- inserts a lot of Classes A with a Lob Field
- Then insert some classes B that referencing class A with a manyToMany-Mapping.
- Commit Transaction

When
<property name="eclipselink.jdbc.batch-writing" value="Oracle-JDBC" />
Then we get an java.sql.SQLException: ORA-02291 - Parent-Key not found.
You see all necessary inserts into table A in the log. But the insert into the mapping table fails, although the id is correct and should be there.

When
<property name="eclipselink.jdbc.batch-writing" value="JDBC" />
Then everything runs fine.

When the tests is executed with H2 or DB2 everything runs fine.

And also we think to remember, that with the Oracle-JDBC setting and toplink the test runs fine.

regards,
Hans
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Re: IndirectMap.containsKey leads to Exception because, DISTINCT on @Lob-Field

2009-11-18T09:13:17Z

Hi Hans,
the stack trace shows that you are using a query optimization feature
called batch reading

e.g.

@NamedQuery(

...
hints= {

@QueryHint(
name=QueryHints.BATCH,

...

Batch reading and an attributed mapped to a LOB column run into this
problem.
As James described there are two possible solutions:
1. Do not use batch reading.
or
2. Add another releationship mapping to an entity object that maps the
LOB column.
For this relationship mapping no batch reading should be used.

Best regards,
Reinhard

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Re: ReadAllQuery fetch all

2009-11-18T05:58:49Z

Hello Martin,

I do not believe joining (or batch reading, another option) on a
collection mapping will work when using a cursor. Joining will cause
multiple rows to be associated to the object, but the cursor will
prevent going through the entire result set to build the object, so the
returned objects will be based on a single row - and so collections will
be incomplete. Batching may work, but since the batch query to bring in
references is based on the original query, it negates the value of using
a cursor as all the collection objects will be read in at once.

What I would suggest instead is using pagination to read in batches -
for instance ordering results and setting the first row/max results on
the query object to return a manageable size of results. A fetch join
can then be used since all rows returned will be used to create the objects.

Best Regards,
Chris

Janda Martin wrote:

> Thank you, I tried "addJoinedAttribute" but theres problem. It doesn't work. It changed generated SQL command to use "select distinct e ..." instead of "select o ...".
>
> <entityClass> has 4 lazy,optional OneToMany mappings that I nead to be fetched.
>
> @OneToMany(mappedBy = "datas", cascade = CascadeType.ALL)
> @OrderBy("dataType, azimut")
> private List<DData> dDataCollection;
>
>
> ReadAllQuery readAllQuery = new ReadAllQuery(<entityClass>);
> readAllQuery.setJPQLString("select object(o) from <table>");
>
> ScrollableCursorPolicy policy = new ScrollableCursorPolicy();
> policy.setPageSize(200);
> policy.setResultSetType(ScrollableCursorPolicy.TYPE_SCROLL_INSENSITIVE);
> policy.setResultSetConcurrency(ScrollableCursorPolicy.CONCUR_READ_ONLY);
>
> readAllQuery.useScrollableCursor(policy);
>
> // your suggestion
> readAllQuery.addJoinedAttribute(readAllQuery.getExpressionBuilder().anyOf("dDataCollection"));
> // or - second one uses "get" instead of "anyOf" - throws exception
> readAllQuery.addJoinedAttribute("dDataCollection");
> // select distinct ... is generated on query execution
>
> ScrollableCursor scrollableCursor = (ScrollableCursor) uow.executeQuery(readAllQuery);
>
>
> I've tried FetchGroup but I get exception that FetchGroupManager isn't set/installed.
>
> Correctly and as I expect works only fetch = EAGER. There is generated new select DData for every entity.
>
> It would be great to have some kind of QueryHint/boolean property on DatabaseQuery to disable lazy loading.
>
> Please can you give me another advice how to make it. I think that my problem is typical for Java SE applications when you need select some entities from database. Close all connections and run some computation on selected entities.
>
> Martin
>
> ----- Original Message -----
> From: "Tom Ware" <tom.ware@...>
> To: "EclipseLink User Discussions" <eclipselink-users@...>
> Sent: Tuesday, November 17, 2009 3:09:44 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna
> Subject: Re: [eclipselink-users] ReadAllQuery fetch all
>
> 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
>> _______________________________________________
>> eclipselink-users mailing list
>> eclipselink-users@...
>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>
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Re: ReadAllQuery fetch all

2009-11-18T05:18:36Z

Thank you, I tried "addJoinedAttribute" but theres problem. It doesn't work. It changed generated SQL command to use "select distinct e ..." instead of "select o ...".

<entityClass> has 4 lazy,optional OneToMany mappings that I nead to be fetched.

@OneToMany(mappedBy = "datas", cascade = CascadeType.ALL)
@OrderBy("dataType, azimut")
private List<DData> dDataCollection;

ReadAllQuery readAllQuery = new ReadAllQuery(<entityClass>);
readAllQuery.setJPQLString("select object(o) from <table>");

ScrollableCursorPolicy policy = new ScrollableCursorPolicy();
policy.setPageSize(200);
policy.setResultSetType(ScrollableCursorPolicy.TYPE_SCROLL_INSENSITIVE);
policy.setResultSetConcurrency(ScrollableCursorPolicy.CONCUR_READ_ONLY);

readAllQuery.useScrollableCursor(policy);

// your suggestion
readAllQuery.addJoinedAttribute(readAllQuery.getExpressionBuilder().anyOf("dDataCollection"));
// or - second one uses "get" instead of "anyOf" - throws exception
readAllQuery.addJoinedAttribute("dDataCollection");
// select distinct ... is generated on query execution

ScrollableCursor scrollableCursor = (ScrollableCursor) uow.executeQuery(readAllQuery);

I've tried FetchGroup but I get exception that FetchGroupManager isn't set/installed.

Correctly and as I expect works only fetch = EAGER. There is generated new select DData for every entity.

It would be great to have some kind of QueryHint/boolean property on DatabaseQuery to disable lazy loading.

Please can you give me another advice how to make it. I think that my problem is typical for Java SE applications when you need select some entities from database. Close all connections and run some computation on selected entities.

Martin

----- Original Message -----
From: "Tom Ware" <tom.ware@...>
To: "EclipseLink User Discussions" <eclipselink-users@...>
Sent: Tuesday, November 17, 2009 3:09:44 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna
Subject: Re: [eclipselink-users] ReadAllQuery fetch all

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
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@...
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users

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Re: Defining persistence.xml programmatically?

2009-11-18T03:08:15Z

Thanks for the hint.
I filed it and you can find it here now:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=295427

Hopefully i was able to express what we would really appreciate to have ;)

Shaun Smith wrote:

You can enter a bug/enhancement request in Eclipse's bugzilla. You'll
need to create an account before you can enter a bug. EclipseLink is an
RT project and here's a quick link to entering an EclipseLink bug:
https://bugs.eclipse.org/bugs/enter_bug.cgi?product=EclipseLink

Shaun

Re: IndirectMap.containsKey leads to Exception because DISTINCT on @Lob-Field

2009-11-18T02:21:30Z

Hi James, Hi Reinhard,

thank you very much for your answers.

I'm not sure about your suggested workaround. How can I set the dontUseDistinct() property on the query, when I don't specify the query manually.
Is there a annotation based possibility on the Many-to-Many property?

Right now the field in the owning class looks like this:
@ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE})
@MapKey(name = "typeId")
@XStreamAlias("customFields")
private Map<CustomFieldType, CustomFieldValue> customFields;

and the CustomFieldValue class contains the Clob Field
@Lob
@Column(nullable = true)
@XStreamAlias("stringValue")
private String stringValue;

I searched the API and documentation but can't find anything.

Because the exception appeared at one of our customers a hint to a workaround through editing the persistence.xml and the orm.xml would be great.

Thanks in advance,
Hans

> -----Ursprüngliche Nachricht-----
> Von: "James Sutherland" <jamesssss@...>
> Gesendet: 17.11.09 19:42:42
> An: eclipselink-users@...
> Betreff: Re: [eclipselink-users] IndirectMap.containsKey leads to Exception because DISTINCT on @Lob-Field

>
> The distinct is used because you are using batch reading on the query. If
> you do not set batch reading on the query then you will not have the issue.
> Batch reading uses a distinct to avoid fetching duplicate data. You can
> disable the usage of the distinct by setting dontUseDistinct() on the
> original batch query. But then you will be selecting duplicate potentially.
>
> You could also try moving the Lob to another table, or use a fetch group
> (LAZY) on the Lob to avoid selecting it by default.
>
> We could probably try to auto-detect a Lob field in the descriptor and not
> add the distinct, so you could log a bug for that.
>
>
> Hans Harz-2 wrote:
> >
> > 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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> >
>
>
> -----
> http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland
> http://www.eclipse.org/eclipselink/
> EclipseLink , http://www.oracle.com/technology/products/ias/toplink/
> TopLink
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> Book: http://en.wikibooks.org/wiki/Java_Persistence Java Persistence
> --
> View this message in context: http://old.nabble.com/IndirectMap.containsKey-leads-to-Exception-because-DISTINCT-on-%40Lob-Field-tp26390360p26395252.html
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EclipseLink 1.1.3: object persisted is not considered registered at commit time

2009-11-17T14:51:21Z

I am using the EclipseLink 1.1.3, specifically the
eclipselink-1.1.3.v20091002-r5404.zip distribution.

I have a disconnected set of new and existing objects that I want to
reattach to a clear()ed persistence manager via persist() or merge()
as appropriate, and then commit(). Basically, we have our own simple
JPA-API-based unit of work implementation which tracks changes to
disconnected objects and then reattaches and commits those objects at
an commit time.

This methodology has worked fine in the past for similar situations,
but today I'm hitting a problem where a new object which was
persist()ed is being flagged as unpersisted in
discoverAndPersistUnregisteredNewObjects() during commit().

java.lang.IllegalStateException: During synchronization a new object
was found through a relationship that was not marked cascade PERSIST:
[toString() representation of my entity].

Thread [btpool0-3] (Suspended (exception IllegalStateException))
RepeatableWriteUnitOfWork(UnitOfWorkImpl).discoverAndPersistUnregisteredNewObjects(Object,
boolean, Map, Map, Map) line: 4010
OneToOneMapping(ObjectReferenceMapping).cascadeDiscoverAndPersistUnregisteredNewObjects(Object,
Map, Map, Map, UnitOfWorkImpl) line: 743
ObjectBuilder.cascadeDiscoverAndPersistUnregisteredNewObjects(Object,
Map, Map, Map, UnitOfWorkImpl) line: 1511
RepeatableWriteUnitOfWork(UnitOfWorkImpl).discoverAndPersistUnregisteredNewObjects(Object,
boolean, Map, Map, Map) line: 4013
RepeatableWriteUnitOfWork.discoverUnregisteredNewObjects(Map, Map,
Map, Map) line: 206
RepeatableWriteUnitOfWork(UnitOfWorkImpl).calculateChanges(Map,
UnitOfWorkChangeSet, boolean) line: 628
RepeatableWriteUnitOfWork(UnitOfWorkImpl).commitToDatabaseWithChangeSet(boolean)
line: 1387
RepeatableWriteUnitOfWork.commitRootUnitOfWork() line: 181
RepeatableWriteUnitOfWork(UnitOfWorkImpl).commitAndResume() line: 1060
EntityTransactionImpl.commitInternal() line: 84
EntityTransactionImpl.commit() line: 63

This is the behavior I am seeing. When I call persist() with this
specific object instance and trace through the code to
RepeatableWriteUnitOfWork(UnitOfWorkImpl).checkIfAlreadyRegistered, I
see that a copy of the object is already considered registered,
although not the specific instance I'm working with. [id instance
values shown from the eclipse debugger]

Argument:
dataEntity = com.gvea.applications.cis.entity.jpa.JpaReceiptSource (id=2510)

RepeatableWriteUnitOfWork(UnitOfWorkImpl).checkIfAlreadyRegistered(Object,
ClassDescriptor) line: 765
RepeatableWriteUnitOfWork(UnitOfWorkImpl).registerNewObjectForPersist(Object,
Map) line: 4039
EntityManagerImpl.persist(Object) line: 255

if (hasNewObjects()) {
registeredObject = getNewObjectsOriginalToClone().get(object);

Values after checking getNewObjectsOriginalToClone() map:

this = org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork
(id=2859)
object = com.gvea.applications.cis.entity.jpa.JpaReceiptSource (id=2510)
registeredObject =
com.gvea.applications.cis.entity.jpa.JpaReceiptSource (id=2868)

As you can see, the copy (id=2868) is detected as registered, not the
original object being persisted.

But then when I go to commit(), I get the above IllegalStateException
for (id=2510) since the code appears to only check getCloneMapping()
and not getNewObjectsOriginalToClone() like the persist method does.
[stack trace above]

if (!isObjectRegistered(object)) {
[...]
} else {
// It is new but not referenced by a cascade persist
mapping, throw an error.
throw new
IllegalStateException(ExceptionLocalization.buildMessage("new_object_found_during_commit",
new Object[]{object}));
}

this = org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork
(id=2859)
object = com.gvea.applications.cis.entity.jpa.JpaReceiptSource (id=2510)
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Re: how can I reference a foreign key in ejbql where condition?

2009-11-17T13:11:42Z

Hi James,

James Sutherland wrote:

Why are you using a ReadAllQuery, if you are using JPA and JPQL? Just create a JPA Query,

Yes, it works well. Thx a lot

Zamek

Re: IndirectMap.containsKey leads to Exception because DISTINCT on @Lob-Field

2009-11-17T10:41:50Z

The distinct is used because you are using batch reading on the query. If you do not set batch reading on the query then you will not have the issue. Batch reading uses a distinct to avoid fetching duplicate data. You can disable the usage of the distinct by setting dontUseDistinct() on the original batch query. But then you will be selecting duplicate potentially.

You could also try moving the Lob to another table, or use a fetch group (LAZY) on the Lob to avoid selecting it by default.

We could probably try to auto-detect a Lob field in the descriptor and not add the distinct, so you could log a bug for that.

Hans Harz-2 wrote:

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)

_____________________________________________________________
DSL-Preisknaller: DSL-Komplettpakete von WEB.DE schon für
16,99 Euro/mtl.!* Hier klicken: http://produkte.web.de/go/02/

James Sutherland
EclipseLink, TopLink
Wiki: EclipseLink, TopLink
Forums: TopLink, EclipseLink
Book: Java Persistence

Re: IndirectMap.containsKey leads to Exception because DISTINCT, on @Lob-Field (Reinhard Girstenbrei)

2009-11-17T09:34:37Z

Hi Hans,
Oracle Database Server does not allow to use the DISTINCT clause if
there is a select list item of data type LOB.
You are using the batch reading which generates queries including a
DISTINCT clause.
Now, as you have an attributed mapped to a LOB you run into this problem.
Your can resolve this problem by not using batch reading.

If you have access to "My Oracle Support" (formerly known as Metalink)
you have access to the following enhancement request:

Bug 6646443 - ALLOW *BATCH* *READING* OF *LOB* COLUMNS IN ONETOMANY AND
MANYTOMANY RELATIONSHIPS

I have not found an enhancement request for such feature on bugzilla yet.

You can open a new SR if you have a valid support contract to vote for
this enhancement request or open an enhancement request at bugzilla.
https://bugs.eclipse.org/bugs/
Classification: RT
Product: EclipseLink
Component: Foundation

Greetings,
Reinhard

eclipselink-users-request@... wrote:

> Send eclipselink-users mailing list submissions to
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>
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> or, via email, send a message with subject or body 'help' to
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> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of eclipselink-users digest..."
>
>
> 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@...>
> Subject: [eclipselink-users] Postgres arrays
> To: EclipseLink User Discussions <eclipselink-users@...>
> Message-ID: <4B018C54.502@...>
> 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@...>
> Subject: [eclipselink-users] Re: Postgres arrays
> To: EclipseLink User Discussions <eclipselink-users@...>
> Message-ID: <4B01C477.1090207@...>
> 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@...>
> Subject: [eclipselink-users] ReadAllQuery fetch all
> To: EclipseLink Users <eclipselink-users@...>
> Message-ID: <5B79C16E-9C64-4786-B33B-4A5CD86B6E61@...>
> 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@...>
> Subject: [eclipselink-users] IndirectMap.containsKey leads to
> Exception because DISTINCT on @Lob-Field
> To: eclipselink-users@...
> Message-ID: <1852227376@...>
> 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)
>
> _____________________________________________________________
> DSL-Preisknaller: DSL-Komplettpakete von WEB.DE schon für
> 16,99 Euro/mtl.!* Hier klicken: http://produkte.web.de/go/02/
>
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 17 Nov 2009 09:09:44 -0500
> From: Tom Ware <tom.ware@...>
> Subject: Re: [eclipselink-users] ReadAllQuery fetch all
> To: EclipseLink User Discussions <eclipselink-users@...>
> Message-ID: <4B02AEA8.5020103@...>
> 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
>> _______________________________________________
>> eclipselink-users mailing list
>> eclipselink-users@...
>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>
>
>
> ------------------------------
>
> Message: 6
> Date: Tue, 17 Nov 2009 06:38:39 -0800 (PST)
> From: James Sutherland <jamesssss@...>
> Subject: Re: [eclipselink-users] how can I reference a foreign key in
> ejbql where condition?
> To: eclipselink-users@...
> Message-ID: <26391063.post@...>
> 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
> http://www.eclipse.org/eclipselink/
> EclipseLink , http://www.oracle.com/technology/products/ias/toplink/
> TopLink
> Wiki: http://wiki.eclipse.org/EclipseLink EclipseLink ,
> http://wiki.oracle.com/page/TopLink TopLink
> Forums: http://forums.oracle.com/forums/forum.jspa?forumID=48 TopLink ,
> http://www.nabble.com/EclipseLink-f26430.html EclipseLink
> Book: http://en.wikibooks.org/wiki/Java_Persistence Java Persistence
>

Re: How eclipselink handles Sequences?

2009-11-17T07:27:24Z

Doesn't sound correct, the preallocation size must match the increment. But if it works for you, then fine.

As for runnning out of sequence numbers see,

http://en.wikibooks.org/wiki/Java_Persistence/Identity_and_Sequencing#Running_Out_of_Numbers

The difference of 1 vs 50 should not effect running out, either you would run out anyway, or more likely it is the difference between 100 millions years and 20 millions years...

saasira wrote:

Hi James,

I think I found a solution to my problem...

Here is what I did:

Database:Postgres
Application Server: Glassfish V2.1

Database Sequence: Increment=1,Cache=100
Sequence Pre Allocation Size Annotation on Entity=100

I tried with parallelly/simultaneously populating the data with three
different applications: eclipselink based application,pgAdmin, psql (command
line shell for postgres); I'm happy to say that everything worked fine with
out any collisions and no gaps in numbers generated by the sequence. Of
course, if any of the client has fetched a set of numbers(specified by the
Cache size) and closed the connection before completely using up the set of
numbers fetched, then there will be unused ids. However, we can eliminate
this by reducing the cache size to 50 or 25, based on our needs.

So, the solution is not to synchronize allocation size with sequence
increment value but to sysnchronize the allocation size with Cache size of
the sequence.
In this way, we can eliminate the collision of numbers as well as reduce the
gaps that may be produced in case of Increment_Value Vs allocationSize
sync..
If you find any issues with this approach, can you please explain those?

Thanks and Regards,
Samba

On Wed, Nov 11, 2009 at 1:28 PM, Samba <saasira@gmail.com> wrote:

> Hi James,
> Thanks for your response.
>
> I have a need where the same database is used by three different
> applications: eclipselink , JDBC(legacy), and stored procedures which are
> used mainly during bulk operations and upgrade scenarios.
>
> In such a scenario, I cannot have that luxury of unused id values, as there
> will be too many over a period of time and the sequence soon
> becomes exhausted; may be I'm exaggerating when I say that this may happen
> soon but nevertheless, there will be 50 times lesser available ids, provided
> allocation size is set at 50.
>
> By the way, I suppose that incrementing a sequence value will be DML and
> not DDL, after all we are not altering the name of the sequence or dropping
> it, and databases are capable of handling concurrency.
>
> In fact, eclipselink is behaving correctly in case of Table Sequences and
> updating the SEQUIENCE_COUNT column by 50 when ever it prefetches id values
> by that number.
>
> So, why is this differential treatment in case of native Sequences?
> shouldn't eclipselink increment the sequence value by 50 as it does in case
> of Table Sequence?
>
>
>
>
>
>
>
>
>
>
> On Tue, Nov 10, 2009 at 9:41 PM, James Sutherland <jamesssss@yahoo.com>wrote:
>
>>
>> The purpose of sequence preallocation is to improve performance. If you
>> want
>> your increment to be 1, then set your preallocation size to 1, and there
>> will be no issues. If you want to improve performance, then you need to
>> set
>> your increment to the preallocation size, if this is say 50, this will not
>> cause any issues with the other application if it assumes it is 1, ids
>> will
>> not collide, you will have some unused ids, but that should not be an
>> issue.
>>
>> Changing DDL objects on the fly, is not a very good idea.
>>
>>
>>
>> saasira wrote:
>> >
>> > This following is quoted from the eclipselink User Guide :
>> >
>> > "The key difference between Oracle Type Sequencing process and the
>> process
>> > involved in table sequencing is that EclipseLink is unaware of the
>> > INCREMENTconstruct on the
>> > SEQUENCE object. EclipseLink sequencing and the Oracle SEQUENCE object
>> > operate in isolation. To avoid sequencing errors in the application, set
>> > the
>> > EclipseLink preallocation size and the Oracle SEQUENCE object INCREMENT
>> to
>> > the same value. Note that the Oracle sequence object must have a
>> starting
>> > value equal to the preallocation size because when EclipseLink gets the
>> > next
>> > sequence value, it assume it has the previous preallocation size of
>> > values."
>> >
>> > We have a scenario where the database is updated not only by an eclipse
>> > link
>> > based application but by stored procedures as well. for that matter, I
>> > believe that we cannot make an assumption that the eclipse link is
>> owning
>> > the database and operates on it in isolation.
>> >
>> > So, if we use the increment value of the sequence to the preallocation
>> > size
>> > defined on the eclipse link entity definition, then there will be a lot
>> > of
>> > sequence values unused.
>> > But if we set the increment value of the sequence to nominal 1, then
>> there
>> > is every chance of collision with the values generated by sequence and
>> > that
>> > generated by eclipse link.
>> >
>> >
>> > Now my question is why can't the eclipse link update the sequence object
>> > by
>> > the preallocation size when ever it want to prefetch values? why is it
>> > updating only by the original increment size of the sequence even though
>> > it
>> > is presuming it acquired the amount o values mentioned in the
>> > preallocation
>> > size in the entity?
>> >
>> > for example, had eclipse link done some thing like this:
>> >
>> > on Oracle:
>> >
>> > ALTER SEQUENCE SEQUENCE_NAME INCREMENT BY 'preallocation_size'; where
>> ever
>> > eclipse link wanted to prefetch the values
>> > and then resetting it back to
>> > ALTER SEQUENCE SEQUENCE_NAME INCREMENT BY 'original_increment_value';
>> >
>> >
>> > then there can be no error at any point , who ever may update the
>> database
>> > from any where as long as sequence is properly used.
>> >
>> > Can this be achieved by any setting by which I can force elipselink to
>> > always update the sequence value by preallocation size and not the
>> > INCREMENT
>> > SIZE?
>> >
>> > Thanks and Regards,
>> > Samba
>> >
>> >

James Sutherland
EclipseLink, TopLink
Wiki: EclipseLink, TopLink
Forums: TopLink, EclipseLink
Book: Java Persistence

Re: how can I reference a foreign key in ejbql where condition?

2009-11-17T06:38:39Z

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

James Sutherland
EclipseLink, TopLink
Wiki: EclipseLink, TopLink
Forums: TopLink, EclipseLink
Book: Java Persistence

Re: ReadAllQuery fetch all

2009-11-17T06:09:44Z

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:

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IndirectMap.containsKey leads to Exception because DISTINCT on @Lob-Field

2009-11-17T05:58:09Z

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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ReadAllQuery fetch all

2009-11-16T14:02:08Z

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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Re: Postgres arrays

2009-11-16T13:30:31Z

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
>
>

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Postgres arrays

2009-11-16T09:30:57Z

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

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Re: Defining persistence.xml programmatically?

2009-11-16T07:34:09Z

You can enter a bug/enhancement request in Eclipse's bugzilla. You'll need to create an account before you can enter a bug. EclipseLink is an RT project and here's a quick link to entering an EclipseLink bug: https://bugs.eclipse.org/bugs/enter_bug.cgi?product=EclipseLink

Shaun

Dirk Hermanns wrote:

Hi Shaun!
2009/11/16 Shaun Smith <shaun.smith@...>

Hi Dirk,

Dirk Hermanns wrote:
...

What i would like to have even more is, that each bundle has it's own fragment of the persistence.xml file. Each one should contain
only that Entity classes of the osgi bundle itself.

There's currently no support for persistence.xml "fragments" but it is an interesting idea.

Is this possible? The reason behind this is, that i want to modularize my system into osgi bundles. Each bundle has its own
entities, but they are all running in the same database. And i would like to have only one emf, so that i can share the entities
among all bundles.

I understand what you're trying to achieve but there's nothing now. We'd have to think about and investigate how this could be done. Can you file an enhancement request for this?

Sure - if you can point me to the destination where i can do this ;)
In the attached link you are talking about:
""Just to confirm that in pre 2.0 EclipseLink you do need all of your entities in the same bundle as your persistence.xml for weaving to work""

So will the distribution of entities only work für EclipseLink 2.0? Is there already a release date for 2.0?

Distribution should work pre-2.0. It's only weaving that will not work across multiple bundles pre-2.0. You should be able to get something working and when you upgrade to 2.0 weaving will be possible. The current GA date is December 10th, 2009. You can find the project calendar here: http://www.google.com/calendar/embed?src=2gbj1in54n5qblravii82qhti4@...&ctz=Canada/Toronto

Shaun
Thx a lot,
Dirk
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Re: Defining persistence.xml programmatically?

2009-11-16T07:24:02Z

Hi Shaun!

2009/11/16 Shaun Smith <shaun.smith@...>

Hi Dirk,

Dirk Hermanns wrote:
...

What i would like to have even more is, that each bundle has it's own fragment of the persistence.xml file. Each one should contain
only that Entity classes of the osgi bundle itself.

There's currently no support for persistence.xml "fragments" but it is an interesting idea.

Is this possible? The reason behind this is, that i want to modularize my system into osgi bundles. Each bundle has its own
entities, but they are all running in the same database. And i would like to have only one emf, so that i can share the entities
among all bundles.

I understand what you're trying to achieve but there's nothing now. We'd have to think about and investigate how this could be done. Can you file an enhancement request for this?

Sure - if you can point me to the destination where i can do this ;)

In the attached link you are talking about:
""Just to confirm that in pre 2.0 EclipseLink you do need all of your entities in the same bundle as your persistence.xml for weaving to work""

So will the distribution of entities only work für EclipseLink 2.0? Is there already a release date for 2.0?

Distribution should work pre-2.0. It's only weaving that will not work across multiple bundles pre-2.0. You should be able to get something working and when you upgrade to 2.0 weaving will be possible. The current GA date is December 10th, 2009. You can find the project calendar here: http://www.google.com/calendar/embed?src=2gbj1in54n5qblravii82qhti4@...&ctz=Canada/Toronto

Shaun
Thx a lot,
Dirk
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Phone: +19055023094
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Re: Defining persistence.xml programmatically?

2009-11-16T07:00:43Z

Hi Dirk,

Dirk Hermanns wrote:

...
What i would like to have even more is, that each bundle has it's own fragment of the persistence.xml file. Each one should contain
only that Entity classes of the osgi bundle itself.

There's currently no support for persistence.xml "fragments" but it is an interesting idea.

Is this possible? The reason behind this is, that i want to modularize my system into osgi bundles. Each bundle has its own
entities, but they are all running in the same database. And i would like to have only one emf, so that i can share the entities
among all bundles.

I understand what you're trying to achieve but there's nothing now. We'd have to think about and investigate how this could be done. Can you file an enhancement request for this?

In the attached link you are talking about:
""Just to confirm that in pre 2.0 EclipseLink you do need all of your entities in the same bundle as your persistence.xml for weaving to work""

So will the distribution of entities only work für EclipseLink 2.0? Is there already a release date for 2.0?

Distribution should work pre-2.0. It's only weaving that will not work across multiple bundles pre-2.0. You should be able to get something working and when you upgrade to 2.0 weaving will be possible. The current GA date is December 10th, 2009. You can find the project calendar here: http://www.google.com/calendar/embed?src=2gbj1in54n5qblravii82qhti4@...&ctz=Canada/Toronto

Shaun

Thx a lot,
Dirk


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Re: Defining persistence.xml programmatically?

2009-11-16T06:47:11Z

Hi Shaun!

Thanks for your quick reply. You wrote that i can distribute entities of the same persistence unit over different osgi bundles.
What i would like to have even more is, that each bundle has it's own fragment of the persistence.xml file. Each one should contain
only that Entity classes of the osgi bundle itself.

Is this possible? The reason behind this is, that i want to modularize my system into osgi bundles. Each bundle has its own
entities, but they are all running in the same database. And i would like to have only one emf, so that i can share the entities
among all bundles.

In the attached link you are talking about:
""Just to confirm that in pre 2.0 EclipseLink you do need all of your entities in the same bundle as your persistence.xml for weaving to work""

So will the distribution of entities only work für EclipseLink 2.0? Is there already a release date for 2.0?

Thx a lot,
Dirk
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Re: Defining persistence.xml programmatically?

2009-11-16T06:10:06Z

dhermanns wrote:


Is there anything new regarding Equinox support? It seems to us that auto
discovering ist still not working with equinox - or am i missing something?

Auto discovery has not been implemented in EclipseLink OSGi. Auto discovery is supported in Java EE and can be enabled in Java SE but it may be expensive because of the size of a given application's classpath. My assumption is that auto discovery in OSGi will be challenging given its classloader architecture and the lack of an "application" concept. In Java EE, the persistence unit scope is limited to the EAR or WAR. In OSGi there is currently no mechanism to identify a set of bundles as comprising an application and therefore a scope for auto discovery.

Further more, i would like to have Entities distributed over multiple osgi
bundles, but they should be in the same persistence unit (so that e.g.
transactions are working). We are using the different bundles to modularize
our application.

This is supported.

I was searching a lot about this topic but can't find something about it.
Can anyone help about my 2 questions?

In a recent thread [1] on the forum there was a discussion of byte code weaving in Equinox that you may find interesting. Due to the way annotations are processed in EclipseLink 2.0, byte code weaving of entities in multiple bundles is possible.

Shaun

[1] http://www.eclipse.org/forums/index.php?t=msg&th=156817&start=0&S=4292c26762cd93d81cfbf4f79b30b9a7

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Re: Defining persistence.xml programmatically?

2009-11-15T23:07:48Z

Hi!

Shaun Smith wrote:

"I'm working on it in conjunction with enabling byte code weaving in
Equinox. ;-) This is a ways off so hopefully you can live with listing
the classes for now. I expect we'll see a big improvement in the ease
of use as we transition over to OSGi in EclipseLink and we get more
experience with it."

Is there anything new regarding Equinox support? It seems to us that auto discovering ist still not working with equinox - or am i missing something?

Further more, i would like to have Entities distributed over multiple osgi bundles, but they should be in the same persistence unit (so that e.g. transactions are working). We are using the different bundles to modularize our application.

I was searching a lot about this topic but can't find something about it.
Can anyone help about my 2 questions?

Re: Defining persistence.xml programmatically?

2009-11-15T22:57:41Z

Hi!

"I'm working on it in conjunction with enabling byte code weaving in
Equinox. ;-) This is a ways off so hopefully you can live with listing
the classes for now. I expect we'll see a big improvement in the ease
of use as we transition over to OSGi in EclipseLink and we get more
experience with it."

Is there anything new regarding Equinox support? It seems to us that auto discovering ist still not working with equinox - or am i missing something?

Further more, i would like to have Entities distributed over multiple osgi bundles, but they should be in the same persistence unit (so that e.g. transactions are working). We are using the different bundles to modularize our application.

I was searching a lot about this topic but can't find something about it.
Can anyone help about my 2 questions?

Re: How eclipselink handles Sequences?

2009-11-14T17:26:38Z

Hi James,

I think I found a solution to my problem...

Here is what I did:

Database:Postgres

Application Server: Glassfish V2.1

Database Sequence: Increment=1,Cache=100

Sequence Pre Allocation Size Annotation on Entity=100

I tried with parallelly/simultaneously populating the data with three different applications: eclipselink based application,pgAdmin, psql (command line shell for postgres); I'm happy to say that everything worked fine with out any collisions and no gaps in numbers generated by the sequence. Of course, if any of the client has fetched a set of numbers(specified by the Cache size) and closed the connection before completely using up the set of numbers fetched, then there will be unused ids. However, we can eliminate this by reducing the cache size to 50 or 25, based on our needs.

So, the solution is not to synchronize allocation size with sequence increment value but to sysnchronize the allocation size with Cache size of the sequence.

In this way, we can eliminate the collision of numbers as well as reduce the gaps that may be produced in case of Increment_Value Vs allocationSize sync..

If you find any issues with this approach, can you please explain those?

Thanks and Regards,

Samba

On Wed, Nov 11, 2009 at 1:28 PM, Samba <saasira@...> wrote:

Hi James,

Thanks for your response.

I have a need where the same database is used by three different applications: eclipselink , JDBC(legacy), and stored procedures which are used mainly during bulk operations and upgrade scenarios.

In such a scenario, I cannot have that luxury of unused id values, as there will be too many over a period of time and the sequence soon becomes exhausted; may be I'm exaggerating when I say that this may happen soon but nevertheless, there will be 50 times lesser available ids, provided allocation size is set at 50.

By the way, I suppose that incrementing a sequence value will be DML and not DDL, after all we are not altering the name of the sequence or dropping it, and databases are capable of handling concurrency.

In fact, eclipselink is behaving correctly in case of Table Sequences and updating the SEQUIENCE_COUNT column by 50 when ever it prefetches id values by that number.

So, why is this differential treatment in case of native Sequences? shouldn't eclipselink increment the sequence value by 50 as it does in case of Table Sequence?

On Tue, Nov 10, 2009 at 9:41 PM, James Sutherland <jamesssss@...> wrote:

The purpose of sequence preallocation is to improve performance. If you want
your increment to be 1, then set your preallocation size to 1, and there
will be no issues. If you want to improve performance, then you need to set
your increment to the preallocation size, if this is say 50, this will not
cause any issues with the other application if it assumes it is 1, ids will
not collide, you will have some unused ids, but that should not be an issue.

Changing DDL objects on the fly, is not a very good idea.

saasira wrote:
>
> This following is quoted from the eclipselink User Guide :
>
> "The key difference between Oracle Type Sequencing process and the process
> involved in table sequencing is that EclipseLink is unaware of the

> INCREMENTconstruct on the

> SEQUENCE object. EclipseLink sequencing and the Oracle SEQUENCE object
> operate in isolation. To avoid sequencing errors in the application, set
> the
> EclipseLink preallocation size and the Oracle SEQUENCE object INCREMENT to
> the same value. Note that the Oracle sequence object must have a starting
> value equal to the preallocation size because when EclipseLink gets the
> next
> sequence value, it assume it has the previous preallocation size of
> values."
>
> We have a scenario where the database is updated not only by an eclipse
> link
> based application but by stored procedures as well. for that matter, I
> believe that we cannot make an assumption that the eclipse link is owning
> the database and operates on it in isolation.
>
> So, if we use the increment value of the sequence to the preallocation
> size
> defined on the eclipse link entity definition, then there will be a lot
> of
> sequence values unused.
> But if we set the increment value of the sequence to nominal 1, then there
> is every chance of collision with the values generated by sequence and
> that
> generated by eclipse link.
>
>
> Now my question is why can't the eclipse link update the sequence object
> by
> the preallocation size when ever it want to prefetch values? why is it
> updating only by the original increment size of the sequence even though
> it
> is presuming it acquired the amount o values mentioned in the
> preallocation
> size in the entity?
>
> for example, had eclipse link done some thing like this:
>
> on Oracle:
>
> ALTER SEQUENCE SEQUENCE_NAME INCREMENT BY 'preallocation_size'; where ever
> eclipse link wanted to prefetch the values
> and then resetting it back to
> ALTER SEQUENCE SEQUENCE_NAME INCREMENT BY 'original_increment_value';
>
>
> then there can be no error at any point , who ever may update the database
> from any where as long as sequence is properly used.
>
> Can this be achieved by any setting by which I can force elipselink to
> always update the sequence value by preallocation size and not the
> INCREMENT
> SIZE?
>
> Thanks and Regards,
> Samba
>
>

-----
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TopLink
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Re: Aggregate Functions in ORDER BY

2009-11-12T10:26:16Z

Hi Derek,

The syntax that includes the "AS" in the select clause is only legal in JPA
2.0. To get this to work, please try our latest 2.0 milestone.

-Tom

Derek Knapp wrote:

> thanks for the reply Tom. I tried this
>
> return em.createQuery("SELECT MAX(a.date) AS maxdate, c " +
> "FROM Activity a INNER JOIN a.cookieid
> cookie " +
> "INNER JOIN cookie.contactidCollection c " +
> "INNER JOIN c.listidCollection l " +
> "WHERE l.userid = :user " +
> "AND a.companyid = :company " +
> "AND a.date BETWEEN :start AND :end " +
> "GROUP BY c " +
> "ORDER BY maxdate DESC")
>
> .setParameter("user", user)
> .setParameter("company", user.getCompanyid())
> .setParameter("start", start)
> .setParameter("end", end)
> .getResultList();
>
> but get the following exception
>
>
>
> Caused by: Exception [EclipseLink-8024] (Eclipse Persistence Services -
> 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.JPQLException
> Exception Description: Syntax error parsing the query [SELECT
> MAX(a.date) AS maxdate, c FROM Activity a INNER JOIN a.cookieid cookie
> INNER JOIN cookie.contactidCollection c INNER JOIN c.listidCollection l
> WHERE l.userid = :user AND a.companyid = :company AND a.date BETWEEN
> :start AND :end GROUP BY c ORDER BY maxdate DESC], line 1, *column 19:
> syntax error at [AS].*
> Internal Exception: MismatchedTokenException(8!=27)
> at
> org.eclipse.persistence.exceptions.JPQLException.syntaxErrorAt(JPQLException.java:355)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.handleRecognitionException(JPQLParser.java:304)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.addError(JPQLParser.java:245)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.reportError(JPQLParser.java:362)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.recoverFromMismatchedElement(Unknown
> Source)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(Unknown
> Source)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.mismatch(Unknown
> Source)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.match(Unknown
> Source)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.fromClause(JPQLParser.java:1880)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.selectStatement(JPQLParser.java:341)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.document(JPQLParser.java:261)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.parse(JPQLParser.java:133)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.buildParseTree(JPQLParser.java:94)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:203)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:170)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:134)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:95)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:80)
> at
> org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:740)
> ... 68 more
> Caused by: MismatchedTokenException(8!=27)
> ... 81 more
> StandardWrapperValve[Blocking Servlet]: PWC1406: Servlet.service() for
> servlet Blocking Servlet threw exception
> MismatchedTokenException(8!=27)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.mismatch(Unknown
> Source)
> at
> org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.match(Unknown
> Source)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.fromClause(JPQLParser.java:1880)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.selectStatement(JPQLParser.java:341)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.document(JPQLParser.java:261)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.parse(JPQLParser.java:133)
> at
> org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.buildParseTree(JPQLParser.java:94)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:203)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:170)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:134)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:95)
> at
> org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:80)
> at
> org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:740)
> at
> com.sun.enterprise.util.EntityManagerWrapper.createQuery(EntityManagerWrapper.java:349)
> at
> com.iTrac.Beans.ActivityFacade.getWebHotlist(ActivityFacade.java:182)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1067)
> at
> com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:176)
> at
> com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2895)
> at
> com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:3986)
> at
> com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197)
> at
> com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:83)
> at $Proxy827.getWebHotlist(Unknown Source)
> at itrac.report.webhotlist.load(webhotlist.java:78)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at com.sun.el.parser.AstValue.invoke(AstValue.java:187)
> at
> com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
> at
> com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
> at
> javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
> at
> com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
> at javax.faces.component.UICommand.broadcast(UICommand.java:383)
> at
> javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
> at
> javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
> at
> com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
> at
> com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
> at
> com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
> at
> com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)
> at
> com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:132)
> at
> com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:74)
> at
> com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:31)
> at
> com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
> at
> com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:16)
> at
> com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
> at
> com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)
> at
> com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:26)
> at
> com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
> at
> com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:131)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:290)
> at
> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at
> org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
> at
> com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.process(SSLReadTask.java:440)
> at
> com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.doTask(SSLReadTask.java:228)
> at
> com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
> at
> com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@...
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users

_______________________________________________
eclipselink-users mailing list
eclipselink-users@...
https://dev.eclipse.org/mailman/listinfo/eclipselink-users

Re: starting out with eclipselink eclipse tools

2009-11-12T06:58:50Z

EclipseLink is available on the update site for the Runtime Project in Eclipse
Galileo. Note: Eclipse is a runtime environment for various persistence
strategies (including JPA). There are details at www.eclipse.org/eclipselink

If you are looking for JPA tools, you will likely also want to get Eclipse Dali.

http://www.eclipse.org/webtools/dali/main.php

Dali provides JPA tooling.

-Tom

David Parker wrote:

> I've been working with eclipse for a while, and still don't understand
> it as well as I should. I just started using the Eclipse IDE, and would
> like to use the eclipselink tools to work with my existing JPA classes,
> and hopefully find some problems.
>
> Could I get a pointer to how I install/configure the eclipselink tools
> in eclipse?
>
> TIA
>
> - DAP
> =============================================
> David Parker
> dap@...
>
>
>
>
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@...
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users

_______________________________________________
eclipselink-users mailing list
eclipselink-users@...
https://dev.eclipse.org/mailman/listinfo/eclipselink-users

starting out with eclipselink eclipse tools

2009-11-12T06:52:06Z

I've been working with eclipse for a while, and still don't understand
it as well as I should. I just started using the Eclipse IDE, and
would like to use the eclipselink tools to work with my existing JPA
classes, and hopefully find some problems.

Could I get a pointer to how I install/configure the eclipselink tools
in eclipse?

TIA

- DAP
=============================================
David Parker
dap@...

_______________________________________________
eclipselink-users mailing list
eclipselink-users@...
https://dev.eclipse.org/mailman/listinfo/eclipselink-users

Re: Search using Expression API - Is there an easier way?

2009-11-12T05:07:52Z

I'll probably do the same thing, and once JPA 2.0 comes out , convert
it over to that API which should be trivial since it's based on EL
expressions.

What's stopping you from releasing your Expression tools? Is it
commercial code? If not, you could always throw it up on Google Code
or something. I'd be curious to see how some other people are using
it.

./tch

On Thu, Nov 12, 2009 at 3:03 AM, ossaert <decooman@...> wrote:

>
>
> Well, I have been designing a complete back-end using the Expressions API.
> It gives me much more flexibility than normal EQL-queries. I can dynamically
> add parameters, change queries, re-use expressions, etc. I really like the
> fact, when you use them correctly, then you can refactor your code swiftly
> unlike EQL and SQL.
>
> Although the examples and description of the API could be extended and
> enhanced to show more real-life scenarios. I wish I had the time to
> contribute my findings and experiences with the powerful Expressions API.
>
> Greetings,
> Jan De Cooman
>
>
> Thanks that's slightly better I suppose, I didn't think to do it that
> way. My only issue with QBE is it's not quite flexible enough for more
> complex queries from what I can see. Though I was unable to find a
> list of all the different qbe policies, someone doesn't happen to have
> a link to that do they? Or even better if the string constants for the
> addSpecialOperation method were constants in a class somewhere that
> would be nice.
>
> ./tch
>
>
>
> --
> View this message in context: http://old.nabble.com/Search-using-Expression-API---Is-there-an-easier-way--tp26267399p26314858.html
> Sent from the EclipseLink - Users mailing list archive at Nabble.com.
>
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@...
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>

_______________________________________________
eclipselink-users mailing list
eclipselink-users@...
https://dev.eclipse.org/mailman/listinfo/eclipselink-users

Re: Search using Expression API - Is there an easier way?

2009-11-12T00:03:29Z

Well, I have been designing a complete back-end using the Expressions API. It gives me much more flexibility than normal EQL-queries. I can dynamically add parameters, change queries, re-use expressions, etc. I really like the fact, when you use them correctly, then you can refactor your code swiftly unlike EQL and SQL.

Although the examples and description of the API could be extended and enhanced to show more real-life scenarios. I wish I had the time to contribute my findings and experiences with the powerful Expressions API.

Greetings,
Jan De Cooman

Thanks that's slightly better I suppose, I didn't think to do it that
way. My only issue with QBE is it's not quite flexible enough for more
complex queries from what I can see. Though I was unable to find a
list of all the different qbe policies, someone doesn't happen to have
a link to that do they? Or even better if the string constants for the
addSpecialOperation method were constants in a class somewhere that
would be nice.

./tch

Re: Aggregate Functions in ORDER BY

2009-11-11T14:29:45Z

thanks for the reply Tom. I tried this

        return em.createQuery("SELECT MAX(a.date) AS maxdate, c " +
                              "FROM Activity a INNER JOIN a.cookieid cookie " +
                              "INNER JOIN cookie.contactidCollection c " +
                              "INNER JOIN c.listidCollection l " +
                              "WHERE l.userid = :user " +
                              "AND a.companyid = :company " +
                              "AND a.date BETWEEN :start AND :end " +
                              "GROUP BY c " +
                              "ORDER BY maxdate DESC")

                          .setParameter("user", user)
                          .setParameter("company", user.getCompanyid())
                          .setParameter("start", start)
                          .setParameter("end", end)
                          .getResultList();

but get the following exception

Caused by: Exception [EclipseLink-8024] (Eclipse Persistence Services - 1.0.2 (Build 20081024)): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Syntax error parsing the query [SELECT MAX(a.date) AS maxdate, c FROM Activity a INNER JOIN a.cookieid cookie INNER JOIN cookie.contactidCollection c INNER JOIN c.listidCollection l WHERE l.userid = :user AND a.companyid = :company AND a.date BETWEEN :start AND :end GROUP BY c ORDER BY maxdate DESC], line 1, column 19: syntax error at [AS].
Internal Exception: MismatchedTokenException(8!=27)
        at org.eclipse.persistence.exceptions.JPQLException.syntaxErrorAt(JPQLException.java:355)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.handleRecognitionException(JPQLParser.java:304)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.addError(JPQLParser.java:245)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.reportError(JPQLParser.java:362)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.recoverFromMismatchedElement(Unknown Source)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(Unknown Source)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.mismatch(Unknown Source)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.match(Unknown Source)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.fromClause(JPQLParser.java:1880)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.selectStatement(JPQLParser.java:341)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.document(JPQLParser.java:261)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.parse(JPQLParser.java:133)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.buildParseTree(JPQLParser.java:94)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:203)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:170)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:134)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:95)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:80)
        at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:740)
        ... 68 more
Caused by: MismatchedTokenException(8!=27)
        ... 81 more
StandardWrapperValve[Blocking Servlet]: PWC1406: Servlet.service() for servlet Blocking Servlet threw exception
MismatchedTokenException(8!=27)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.mismatch(Unknown Source)
        at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.match(Unknown Source)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.fromClause(JPQLParser.java:1880)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.selectStatement(JPQLParser.java:341)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.document(JPQLParser.java:261)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.parse(JPQLParser.java:133)
        at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.buildParseTree(JPQLParser.java:94)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:203)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:170)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:134)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:95)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:80)
        at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:740)
        at com.sun.enterprise.util.EntityManagerWrapper.createQuery(EntityManagerWrapper.java:349)
        at com.iTrac.Beans.ActivityFacade.getWebHotlist(ActivityFacade.java:182)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1067)
        at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:176)
        at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2895)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:3986)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:83)
        at $Proxy827.getWebHotlist(Unknown Source)
        at itrac.report.webhotlist.load(webhotlist.java:78)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.el.parser.AstValue.invoke(AstValue.java:187)
        at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
        at javax.faces.component.UICommand.broadcast(UICommand.java:383)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
        at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)
        at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:132)
        at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:74)
        at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:31)
        at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
        at com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:16)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
        at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)
        at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:26)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
        at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:131)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
        at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
        at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:290)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.process(SSLReadTask.java:440)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.doTask(SSLReadTask.java:228)
        at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

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Re: Aggregate Functions in ORDER BY

2009-11-11T13:00:25Z

Hi Derek,

The spec says you cannot quite do what you are proposing, but offers a way to
order by Aggregate Expressions.

You can do something like this:

Select MAX(a.date) as maxdate from DateEntity order by maxdate.

I have just been told there may be a bug with a query above in EclipseLink,
but it is something we should be able to address - so feel free to file a bug if
you have issues.

BTW: The "as" clause ( as maxdate) is not allowed in a constructor
expression, but you may be able to come up with a query that achieves what you want.

-Tom

Derek Knapp wrote:

> is it possible to do something like this?
>
>
> return em.createQuery("SELECT new
> itrac.data.WebHotlist(MAX(a.date) as maxdate, c) " +
> "FROM Activity a INNER JOIN a.cookieid
> cookie " +
> "INNER JOIN cookie.contactidCollection c " +
> "INNER JOIN c.listidCollection l " +
> "WHERE l.userid = :user " +
> "AND a.companyid = :company " +
> "AND a.date BETWEEN :start AND :end " +
> "GROUP BY c " +
> "ORDER BY *MAX(a.date)* DESC")
>
> .setParameter("user", user)
> .setParameter("company", user.getCompanyid())
> .setParameter("start", start)
> .setParameter("end", end)
> .getResultList();
>
>
> if not, is it best to use a sorted collection, and make the WebHotlist
> comparable?
>
>
> ------------------------------------------------------------------------
>
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> eclipselink-users mailing list
> eclipselink-users@...
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users

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Aggregate Functions in ORDER BY

2009-11-11T12:49:12Z

is it possible to do something like this?

        return em.createQuery("SELECT new itrac.data.WebHotlist(MAX(a.date) as maxdate, c) " +
                              "FROM Activity a INNER JOIN a.cookieid cookie " +
                              "INNER JOIN cookie.contactidCollection c " +
                              "INNER JOIN c.listidCollection l " +
                              "WHERE l.userid = :user " +
                              "AND a.companyid = :company " +
                              "AND a.date BETWEEN :start AND :end " +
                              "GROUP BY c " +
                              "ORDER BY MAX(a.date) DESC")

                          .setParameter("user", user)
                          .setParameter("company", user.getCompanyid())
                          .setParameter("start", start)
                          .setParameter("end", end)
                          .getResultList();

if not, is it best to use a sorted collection, and make the WebHotlist comparable?

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Re: how can I reference a foreign key in ejbql where condition?

2009-11-11T02:04:30Z

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