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Navigation through Path to evaluate collection

Hello, I need to evaluate a field ("identifier") which is situated in a collection ... "+        "WHERE item.sku =: key "+        "OR id MEMBER OF :item.apiId.identifier "+        "ORDER BY item ... ;     private String identifier;    } lo Hoel You shoud use JOIN: SELECT item FROM ProductData item

General Performance Issues Illustrated with a Specific Method

; import javax.persistence.Temporal; import lk.gov.health.phsp.pojcs.Identifiable; @Entity @Table public class Client implements Serializable , Identifiable { // <editor-fold defaultstate ... .gov.health.phsp.pojcs.Identifiable; import org.joda.time.LocalDate; import org.joda.time.Period

Optimization Question

to identify exactly what fields have changed from one update to the next. Currently the following ... prone code to identify exactly what's changed and replace only exactly those items ... all database modifications in one transaction. All tracks maintain a java UUID identifier and a mapping

Performance issue in a query due to compareTo calls

(AccessType.FIELD) public class TCStep extends Identifiable { @Index private long stepNumber ... "}) @Entity @Access (AccessType.FIELD) public class Values extends Identifiable { @Index ... Identifiable { @OneToOne (fetch = FetchType.EAGER) private TCStep step; btc_es BTC

"Unexpected query expression" using CriteriaQuery FetchParent Interface

: Unexpected query expression end (non keyword identifier is expected)] with root cause com.objectdb.o.UserException: Unexpected query expression end (non keyword identifier is expected) at com.objectdb.o ... (non keyword identifier is expected) (error 751) (position 9) at com.objectdb.jpa.JpaQuery


metadata.identifiers identifiers left join fetch metadata.sources sources left join fetch metadata ... metadata.types LEFT JOIN FETCH metadata.formats LEFT JOIN FETCH metadata.identifiers LEFT JOIN FETCH

References to objects of missing obsolete entity classes

database: [2021-03-31 15:19:54 #1 type] Type com.btc.ep.vector.tc.internal.dmos.Identifiable is not ... set method for field property com.btc.ep.vector.tc.internal.dmos.Identifiable.uid using reflection ... .NoSuchMethodException: com.btc.ep.vector.tc.internal.dmos.Identifiable.setUid(java.lang.String

ClassCastException during query

.ClassCastException: com.btc.ep.vector.accessor.Identifier$IdentifierKind2 cannot be cast to com.btc.ep.vector.accessor.Identifier$IdentifierKind2 at com.btc.ep.vector.tc.internal.dmos.TCSignal ... .vector.accessor.Identifier.IdentifierKind2 class, loaded by different class loaders. One version

[ObjectDB 2.2.6_02] Unexpected exception (Error 990) at com.objectdb.o.OBC.aJ(OBC.java:961)

identifier) throws Exception { // obtain the moment Calendar now ... = new ChartEntity(identifier); create(chart); chart.addPoint(latestPoint


must match exactly an identifier used to declare an enum constant in this type. Parameters: name

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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