About field

api-jdo

Index.members

Member (field and property) names that compose this index.(Annotation Element of javax.jdo.annotations.Index)

 
api-jpa

EntityResult.fields

Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.(Annotation Element of javax.persistence.EntityResult)

 
release

2.6.1

... Fixed return type of SUM queries on BigDecimal field ( issue #236 ). Fixed a client activation issue when ... Fixed a ClassCastException on selecting an embedded ID field in queries. Fixed an exception ( NullPointerException ) ...

 
release

2.5.1

... mapped (inverse) to-many relationship into an array field ([]) ( issue #195 ). Fixed a bug in loading mapped ... Fixed a bug in loading reference primary key field of an abstract type. Fixed JDO sequence names to be fully ...

 
release

2.5.0

... Fixed a bug in loading reference primary key field of an abstract type. Fixed JDO sequence names to be fully ... merging). Fixed a bug in using a collection field index in queries. Fixed query plan selection for queries ...

 
release

2.5.7

... Fixed a ClassCastException on selecting an embedded ID field in queries. Fixed an exception ( NullPointerException ) ... Fixed an error message in accessing a field of an unknown type in queries ( issue #226 ). Version ...

 
release

2.6.0

... Fixed return type of SUM queries on BigDecimal field ( issue #236 ). Fixed a client activation issue when ... Fixed a ClassCastException on selecting an embedded ID field in queries. Fixed an exception ( NullPointerException ) ...

 
release

2.5.5

... mapped (inverse) to-many relationship into an array field ([]) ( issue #195 ). Fixed a bug in loading mapped ... Fixed a bug in loading reference primary key field of an abstract type. Fixed JDO sequence names to be fully ...

 
release

2.5.4

... mapped (inverse) to-many relationship into an array field ([]) ( issue #195 ). Fixed a bug in loading mapped ... Fixed a bug in loading reference primary key field of an abstract type. Fixed JDO sequence names to be fully ...

 
forum_thread

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 start with some example then. Assume we have an entity that represents an interior design image, called Inspiration : ... of all - the first member in composite index should be a field that is most commonly used in WHERE clauses or maybe the filed that is ... clause for query that returns the biggest result set? Or a field that returns the smallest subset of unique records (like for example ...