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Delete object from collection versus delete from JPQL

Delete object from collection versus delete from JPQL

join(attributeName, jt)

Method From" title="Interface in javax.persistence.criteria">javax.persistence.criteria.From

join(attributeName)

Method From" title="Interface in javax.persistence.criteria">javax.persistence.criteria.From

joinCollection(attributeName, jt)

Method From" title="Interface in javax.persistence.criteria">javax.persistence.criteria.From

joinCollection(attributeName)

Method From" title="Interface in javax.persistence.criteria">javax.persistence.criteria.From

from(entity)

/criteria/Root" title="Interface in javax.persistence.criteria">Root<X> from

from(entityClass)

/criteria/Root" title="Interface in javax.persistence.criteria">Root<X> from

Paths and Types in JPQL and Criteria API

> from">Variables - FROM identification variables ... - when instances of these classes are assigned as arguments. Path expressions that navigate from ... (.) operator. For example, c.capital.name is a nested path expression that continues from

SELECT clause (JPQL / Criteria API)

/EntityManager/createQuery_String_Class_">createQuery("SELECT c FROM Country c", Country.class ... > objects: SELECT c.name FROM Country AS c Using , in query results is referred to as projection. The field values are extracted from (or

[ODB1] Chapter 6 - Persistent Objects

, every transient object that, at commit time, is reachable from a persistent object (using persistent fields ... cannot be shared by references from multiple objects. In addition, embedded objects of persistent ... directly (an embedded object can only be retrieved using a reference from its containing object).