About collection

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Forum
16

PersistenceManager.getObjectsById(Collection,boolean) throwing JDOException

I have a call to getObjectsById(Collection,boolean) that is throwing a JDOException the first time ... why this might occur? We're using ObjectDB 2.2.4_02. The collection being passed in is a HashSetcollection
Forum
16

No clue how to query with collection

getStreet();     int getStreetNo(); } @Entity class Contact {     Collection
collection with a concatenated value of street + streetNo (if not ... that selecting the first item of a collection ain't be a good idea. now I can select the right item
Manual
16

Index Definition

. Arrays and collections that contain values of the above types (including null). Indexes ... ; : } Notice that the paths include a collection, so multiple values will be maintained by the index ... above, the index order should be x first and y second. Indexes on collections are useful in JOIN queries
Manual
16

Running JPA Queries [2011-09-21]

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
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
15

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

Fetching Collections Puzzle

(which is recommended anyway to improve performance). Paul,   As posted above your collection ... to go and retrive the first element of the collection. This will only work if you are within a transaction ... from Node n left outer join fetch n.children where ....." this will also fetch your collection