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Manual
185

FROM clause (JPQL / Criteria API)

The FROM clause declares query identification variables that represent iteration over objects in ... are always polymorphic. JPQL does not provide a way to exclude descendant classes from iteration at the FROM clause level. JPA 2, however, adds support for filtering instances of specific types
JPA Doc
169

Criteria Query From Elements

The interfaces in this group are in use for setting a criteria query FROM clause. Criteria Query Variables The FROM clause in JPA queries (as in SQL) defines the query variables. Query variables are represented in criteria queries by descendant interfaces of the From interface: Range variables
Result
120

How to upgrade from ObjectDB 1.0?

Upgrade - Step By Step To upgrade an existing application that uses ObjectDB 1.0 to ObjectDB 2.0: Replace the old ObjectDB and JDO jar files with the new objectdb.jar file. Make sure that the old jar files are removed from the classpath (check both the build classpath and the execution classpath
Result
120

Upgrade from ObjectDB 1.0

The following pages should be read by ObjectDB 1.0 users: If you need help in upgrading your application from version 1.0 to version 2.0 - please feel free to contact ObjectDB Support.
Manual
56

JPA Query Structure (JPQL / Criteria)

rather than just field values from database tables, as with SQL. That makes JPQL more object oriented friendly ...  of up to 6 clauses in the following format: SELECT ... FROM ... [WHERE ...] [GROUP BY ... [HAVING ...]] [ORDER BY ...] The first two clauses, SELECT and FROM are required in every retrieval query
Manual
47

Chapter 4 - JPA Queries (JPQL / Criteria)

(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP
JPA Doc
41

javax.persistence.criteria.From

javax.persistence.criteria Interface From Superinterfaces: Expression, FetchParentfrom clause, but may also be an embeddable belonging to an entity in the from clause. Serves as a factory for Joins
JPA Doc
38

getCorrelationParent()

Method javax.persistence.criteria.From From getCorrelationParent() Returns the parent From object from which the correlated From object has been obtained through correlation (use of a Subquery correlate method). Returns: the parent of the correlated From object Throws: IllegalStateException
JPA Doc
37

getJoins()

Method javax.persistence.criteria.From Set> getJoins() Return the joins that have been made from this bound type. Returns empty set if no joins have been made from this bound type. Modifications to the set do not affect the query. Returns: joins made from this type Since: JPA 2.0
JPA Doc
36

isCorrelated()

Method javax.persistence.criteria.From boolean isCorrelated() Whether the From object has been obtained as a result of correlation (use of a Subquery correlate method). Returns: boolean indicating whether the object has been obtained through correlation Since: JPA 2.0