PI93064: ECLIPSELINK THROWS ORA-00932 FOR CLOB FIELDS IN AN ELEMENTCOLLECTION

Fixes are available

APAR status

Closed as program error.

Error description

When removing @Embeddable objects from an @ElementCollection
that contain fields of type CLOB, EclipseLink will construct
queries that contain CLOB field types in WHERE clauses. This
is
not valid for Oracle databases and will result in an
ORA-00932
exception. This APAR adds support to the EclipseLink
persistence provider for CLOB field types in
ElementCollections.

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server Liberty - Java Persistence APA - JPA *
*                  2.1 & EclipseLink & Oracle                  *
****************************************************************
* PROBLEM DESCRIPTION: EclipseLink creates a DELETE statement  *
*                      containing CLOB fields, which throws    *
*                      exception ORA-00932 on Oracle DB        *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Example JPA Entity mapping:

    @Embeddable
    public class CollectedEntity {
        @Lob
        @Column(name = "content", nullable = false)
        private String content;
    }

    @Entity
    public class ParentEntity {
        @ElementCollection(fetch = FetchType.EAGER)
        @CollectionTable(
            joinColumns = {
                @JoinColumn(name = "parent_id",
referencedColumnName = "id"),
                @JoinColumn(name = "parent_version",
referencedColumnName = "version")
            })
        private Set<CollectedEntity> subs;
    }

Observe in this example that the @ElementCollection,
Set<CollectedEntity>, has a @Lob field. If the application code
performs a removal from this Set and attempts to merge the
entity back to the persistence context, EclipseLink will
construct a DELETE query to remove from ParentEntity. For
instance:

    em = emf.createEntityManager();

    final Set<CollectedEntity> col1 = new
HashSet<CollectedEntity>(
        Arrays.asList(new CollectedEntity[] {
            new CollectedEntity("label1", "content1"),
            new CollectedEntity("label2", "content2"),
            new CollectedEntity("label3", "content3") }));

    final ParentEntity pdo = new ParentEntity(9,
Collections.unmodifiableSet(col1));
    em.getTransaction().begin();
    em.persist(pdo);
    em.getTransaction().commit();

    final Set<CollectedEntity> col2 = new
HashSet<CollectedEntity>(
                    Arrays.asList(new CollectedEntity[] {
                            new CollectedEntity("label1",
"content1"),
                            new CollectedEntity("label2",
"content2") }));
    final ParentEntity newEntity = new ParentEntity(pdo.getId(),
col2);

    try {
        em.getTransaction().begin();
        //Failure would occur on merge with EclipseLink
construction and execution of DELETE statement
        em.merge(newEntity);
        em.getTransaction().commit();
    } catch (final Exception e) { ... }


Exception:

Exception [EclipseLink-4002] (Eclipse Persistence Services -
3.0.0.qualifier):
org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLSyntaxErrorException: ORA-00932:
inconsistent datatypes: expected - got CLOB

Problem conclusion

The fix for this APAR changes the EclipseLink implementation and
involves an update to the thirdparty source. See
https://bugs.eclipse.org/bugs/show_bug.cgi?id=529602

The fix for this APAR is currently targeted for inclusion in
Service Level (Fix Pack) 9.0.0.9 of WebSphere Application Server
version 9.0 and in fix pack 18.0.0.2 for WebSphere Application
Server Liberty. Please refer to the Recommended Updates page for
delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI93064
Reported component name
WAS LIBERTY COR
Reported component ID
5725L2900
Reported release
CD0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-01-29
Closed date
2018-05-08
Last modified date
2018-05-08

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WAS LIBERTY COR
Fixed component ID
5725L2900

Applicable component levels

RCD0 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSD28V","label":"WebSphere Application Server Liberty Core"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"CD0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI93064: ECLIPSELINK THROWS ORA-00932 FOR CLOB FIELDS IN AN ELEMENTCOLLECTION

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

RCD0 PSY

Document Information

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