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Searching lists within objects

to have the real object at search time. Trying to use join is problematic as for every extra attribute I add to the search, I need to add 2 more joins. Obviously this is not satisfactory ... );         Root<CDI> cdi = q.from(CDI.class);                 Join<CDI, Attribute> attributeJoin = cdi

how to query by properties of onetomany relations? (Error 990)

. You have to use JOIN to define a variable that will iterate over the collection elements. This specific query should be rewritten as follows: select f from Foo f join f.bars b where b.name = ?1 ... up after i a short night and remembered sql joins :) in my last projects i have been using mongodb


Annotation Element javax.persistence.PrimaryKeyJoinColumn String referencedColumnName (Optional) The name of the primary key column of the table being joined to. Defaults to the same name as the primary key column of the primary table of the superclass (JOINED mapping strategy); the same name as

Issue with DISTINCT Select

.foundation.contact.individual.IndividualContact $1 LEFT JOIN $1.profile $2 WHERE ((TYPE($1)=class com ... JOIN $1.profile $2 ORDER BY UPPER($1.profile.lastName) But doesn't help us because we can't change ... using the left join to select all entities, also those which have profile = null quasado Alexander Adam

queries more than 10 times slower using 2.8.1 versus 2.7.6

join o.linkedObjects l1 where o.classIdentifier = '(SI)' and o.type = 0 and o.state = 0 and (o ... 2: "select distinct o from ObjectNode o join o.properties p1 join o.properties p2 join o.properties p10 join o.properties p20 join o.properties p21 where o.classIdentifier = '(OP)' and (o

Weird issue with variable naming

is that we do a LEFT JOIN on an embedded property as well as ordering is involved in selection ... of our left join variable becomes $1. We're also adding a custom function expression in where clause ... ; import javax.persistence.criteria.Join; import javax.persistence.criteria.JoinType; import

Query Execution Error

JOIN $1.mitgliedschaft $2 LEFT JOIN $2.abteilungen $3 LEFT JOIN $3.abteilung $4 WHERE (((NOT ((($2 ... com.lexware.vereinsverwaltung.verein.mitglied.Mitglied $1 LEFT JOIN $1.mitgliedschaft $2 LEFT JOIN $2.abteilungen $3 LEFT JOIN $3.abteilung $4 WHERE (((NOT ((($2 IS NOT NULL) AND ($3 IS NOT NULL

ClassCastException in Tuple.get

.from(DemandAnswer.class); Join<DemandAnswer, Demand> joinDemand = rootDemandAnswer.join("demand"); Join<Object, Object> joinDemandingPerson = joinDemand.join("demandingPerson"); Join<Object, Object> joinProvidingPerson = rootDemandAnswer.join("providingPerson"); joinDemand.join

queries under 2.7.6_4 significantly slower than under 2.7.6

. What we can report is: using a reference query (you have our test db) select distinct o from ObjectNode o join o ... .linkedObjects join v$1). [Step 2b] Evaluate fields in ObjectNode (v$1) instances. [Step 2c] Filter ... .ObjectProperty locating ObjectProperty (v$2) instances that satisfy: (o.properties join v$2). [Step 3b


Annotation Element javax.jdo.annotations.Element String serialized Whether the element is to be stored serialized (into a join table) Returns: whether the element is to be stored serialized (into a join table) Default value: "" Since: JDO 2.1

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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