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JDO Doc
56

Version.indexed

Annotation Element javax.jdo.annotations.Version String indexed Whether the version column(s) is(are) indexed. Returns: whether the version column(s) is(are) indexed Default value: "" Since: JDO 2.1
Manual
54

Chapter 2 - JPA Entity Classes

Explains how to define and use JPA entity classes and other JPA persistable types.
Manual
54

JPA Primary Key

Explains how to define and use primary keys in JPA, including composite and embedded primary keys.
Manual
54

ORDER BY clause (JPQL / Criteria API)

Explains how to use the ORDER BY clause in a JPA/JPQL query.
Manual
49

Database Management Settings

" synchronized="false" />   <index-update enabled="true" priority="40" /> index-update> element   <index-update enabled="true" priority="40" /> The <index-update> element specifies how new defined
Result
28

ObjectDB Object Database Features

result cache (for repeating queries with the same arguments). Many other internal caches. Indexing Single field and multi field (composite) indices. Collection and array elements are indexable (extremely fast JOIN queries). Map keys and values are indexable. Nested paths inside embedded objects
Issue
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combined index not used

.nodePath, a.objectsInCharge.properties.doubleValue In the class Action we have a combined index (see attachment) but in the query plan we can see that this index is not used: Query Plan Description ... ------------------------------------ [Step 1a] Scan index com.agile.hummingbird.Action[endDate] locating all the Action (a) instances
Forum
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possible index required for improving query performance

Hi, I have the following entity class: @Entity @Table @Indices({ @Index(members={"relationshipType", "party"}), @Index(members={"relationshipType", "otherParty"}), @Index(members ... a linear way as the number of relationships and BaseObjects grow. The query is using two indexed fields
Forum
22

Composite indexes

Hi, I read your manual about defining Indexes for JPA Entities (http://www.objectdb.com/java/jpa/entity/index), but I still have some problems understanding how and when should I use them.   Let's ... ; // either true or false (...) }   Here are my questions regarding composite indexes : #1. First
Result
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What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index ... query execution. Support of composite indexes and using indexes in query result sort. Improved query