About collection

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Manual
16

Running JPA Queries

and the warning is avoided. The query result collection functions as any other ordinary Java collection. A result collection of a parameterized type can be iterated easily using an enhanced for loop ... collection after query execution (e.g. by results.get(0)). To eliminate this routine operation JPA
Result
16

ObjectDB Object Database Features [2018-01-27]

other internal caches. Indexing Single field and multi field (composite) indices. Collection and array ... .lang.BigDecimal. Collection types: Collection, List, Set, ArrayList, Vector, Stack, LinkedList ... (LIKE, CONCAT, TRIM, SUBSTRING, ...). JPQL collection operators & functions (IS EMPTY, MEMBER OF, SIZE
Result
16

ObjectDB Object Database Features [2018-10-27]

other internal caches. Indexing Single field and multi field (composite) indices. Collection and array ... .lang.BigDecimal. Collection types: Collection, List, Set, ArrayList, Vector, Stack, LinkedList ... (LIKE, CONCAT, TRIM, SUBSTRING, ...). JPQL collection operators & functions (IS EMPTY, MEMBER OF, SIZE
Result
16

ObjectDB Object Database Features

Single field and multi field (composite) indices. Collection and array elements are indexable ... .sql.Time and java.sql.Timestamp. Math types: java.lang.BigInteger and java.lang.BigDecimal. Collection types: Collection, List, Set, ArrayList, Vector, Stack, LinkedList, ArrayDeque, PriorityQueue
JDO Doc
16

javax.jdo.Query

. There are three required elements in a Query: the class of the results, the candidate collection ... of the subquery candidateCollectionExpression - the candidate collection of the subquery as an expression using ... to be used in this Query candidateCollectionExpression - the candidate collection to apply
Forum
15

Composite index support collection

Hello, is there any chance that you support composite indices with fields and collections combined in the future? We need such feature in our application and would be very happy to see it in ... of one collection). Hello, yes, one collection would be fine for our use cases. Do you have any concrete
Forum
15

Eager Fetch is not stable for collection or map types?

Hi, thanks very much for your helpful software. The problem is the storage of collection or map ... is we confirm that the collection or map are stored successfully by using explorer tools when the JVM stopped ... () of collection or map before closing the EntityManager, data can be retrieved successfully:    public
Forum
15

Navigation to Collection Elements

Greetings ObjectDB team, Suppose I have a collection typed field (list/map/set...) in my persistent ... handling such expressions. Indexes are supported in handling more conventional collection expressions (by ... queries, and anyway, collections are preferred over arrays when using JPA/JDO (and they might be even more efficient). geekox86
Issue
15

Remove of an entry from a @OneToMany collection is not possible if the enhancer is disabled

Hello! When the JPA entities are not enhanced the removal of an entry from a @OneToMany collection ... . It represents an issue with non enhanced classes, but it is not related to @OneToMany collection. Any change ... .0_04. The problem with the @OneToMany collection is still not fixed. You are right, sorry
Forum
15

Search through collection for value using index

I have an entity that contains a java collection of a Long id of user entities that can modify ... could do something besides a java collection if there is a better approach. You can define an index on a collection field as explained in the manual, and the index will be used automatically by queries