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Logical Operators in JPQL and Criteria API

Logical operators in JPQL and in JPA criteria queries enable composition of complex JPQL boolean expressions out of simple JPQL boolean expressions. Logical Operators ObjectDB supports 2 sets of logical operators, as shown in the following table: Set 1 - JPQL / SQL Set 2 - Java / JDO AND && OR
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Privacy Policy

parts of our Service. Unless you have adjusted Your browser setting so that it will refuse Cookies ... and Persistent Cookies for the purposes set out below: Essential Cookies These are Session Cookies ... Your Personal Data only for as long as is necessary for the purposes set out in this Privacy Policy
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Server User List

and specifies their specific settings (username, password, permissions, quota). The default ... ") specifies if the user is a superuser. A superuser is authorized to manage server settings using ... definition. All the settings of that master definition are automatically inherited by all the other user
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SSL Configuration

The <ssl> configuration element specifies Secure Sockets Layer (SSL) settings for secure ... on the server machine. Setting the Configuration <ssl enabled="true"> <server-keystore path="$objectdb ... attribute of the ssl element has to be set to true. Every Keystore / Truststore file is represented by
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javax.persistence.Query

- if the statement execution exceeds the query timeout value set and only the statement is rolled back PersistenceException - if the query execution exceeds the query timeout value set and the transaction is rolled back Since: JPA 1.0 int getFirstResult() The position of the first result the query object was set
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javax.persistence.metamodel.EntityType

Since: JPA 2.0 Set< Attribute<?,?>> getAttributes() Return the attributes of the managed type. Return ... of the given name is not declared in the managed type Since: JPA 2.0 Set< Attribute<X ... the managed type. Returns empty set if the managed type has no declared attributes. Returns
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javax.persistence.metamodel.MappedSuperclassType

the managed type Since: JPA 2.0 Set< Attribute<?,?>> getAttributes() Return the attributes ... declared in the managed type Since: JPA 2.0 Set< Attribute<X,?>> getDeclaredAttributes() Return ... set if the managed type has no declared attributes. Returns: declared attributes of the managed type
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javax.persistence.metamodel.IdentifiableType

of the given name is not present in the managed type Since: JPA 2.0 Set< Attribute<?,?>> getAttributes ... of the given name is not declared in the managed type Since: JPA 2.0 Set< Attribute<X ... the managed type. Returns empty set if the managed type has no declared attributes. Returns: declared
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javax.jdo.FetchPlan

is initialized to the same settings as that of the PersistenceManager. Subsequent modifications ... the fetch group to the set of active fetch groups. Add the fetch group to the set of active fetch groups ... getFetchSize() Return the fetch size, or FETCH_SIZE_OPTIMAL if not set, or FETCH_SIZE_GREEDY to fetch
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javax.jdo.FetchGroup

.getFetchGroup, it is unscoped. When a FetchGroup is added to the set of active FetchGroups ... is removed from the set of active FetchGroups via PersistenceManagerFactory.removeFetchGroups ... . Using this category also sets the fetch-depth for the members in the default fetch group

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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