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JPA Queries

variables, join and fetch): Other criteria query expressions (for all the query clauses):
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JPA Annotations for Relationships

annotation enables configuring cascade and fetch policy, using the following enum types: Additional
8

JPA Criteria API Queries

). FROM clause (from, join, fetch). WHERE clause (where). GROUP BY / HAVING clauses (groupBy, having
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JPA Query Structure (JPQL / Criteria)

, multiselect, array, tuple, construct). Criteria FROM (from, join, fetch). Criteria WHERE (where). Criteria
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javax.jdo.FetchGroup

javax.jdo Interface FetchGroup FetchGroup represents a named fetch group for a specific class or interface. A fetch group instance identifies the name of the class or interface, the list of members (fields or properties) to be fetched when the fetch group is active, and the recursion depth for each
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javax.jdo.annotations.FetchPlan

javax.jdo.annotations Annotation FetchPlan Target: Classes Annotation for the fetch plan of a persistence manager, query, or extent. Corresponds to the xml element "fetch-plan". Since: JDO 2.1 String[] fetchGroups The fetch groups in this fetch plan. The fetch groups in this fetch plan. Returns
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javax.jdo.annotations.FetchGroup

javax.jdo.annotations Annotation FetchGroup Target: Classes Annotation for the fetch group of a class. Corresponds to the xml element "fetch-group". Since: JDO 2.1 String[] fetchGroups Fetch groups to be nested (included) in this fetch group. Fetch groups to be nested (included) in this fetch group
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retrieveAll(useFetchPlan, pcs)

fetch group must be retrieved, and the implementation might retrieve more fields than the current fetch group. If the useFetchPlan parameter is false, this method behaves exactly as the corresponding method without the useFetchPlan parameter. If the useFetchPlan parameter is true, and the fetch plan
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retrieveAll(pcs, useFetchPlan)

fetch group must be retrieved, and the implementation might retrieve more fields than the current fetch group. If the useFetchPlan parameter is false, this method behaves exactly as the corresponding method without the useFetchPlan parameter. If the useFetchPlan parameter is true, and the fetch plan
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retrieveAll(pcs, useFetchPlan)

fetch group must be retrieved, and the implementation might retrieve more fields than the current fetch group. If the useFetchPlan parameter is false, this method behaves exactly as the corresponding method without the useFetchPlan parameter. If the useFetchPlan parameter is true, and the fetch plan

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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