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MapKeyColumn.unique

Annotation Element javax.persistence.MapKeyColumn boolean unique (Optional) Whether the column is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key constraint corresponds to only a single column. This constraint applies in
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javax.persistence.Inheritance

javax.persistence Annotation Inheritance Target: Classes Defines the inheritance strategy to be used for an entity class hierarchy. It is specified on the entity class that is the root of the entity class hierarchy. If the Inheritance annotation is not specified or if no inheritance type
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Value.column

Annotation Element javax.jdo.annotations.Value String column Name of the column to store the value in. Returns: the name of the column to store the value in Default value: "" Since: JDO 2.1
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FetchPlan.fetchSize

Annotation Element javax.jdo.annotations.FetchPlan int fetchSize The number of instances of multi-valued fields retrieved by queries. Returns: the fetch size Default value: 0 Since: JDO 2.1
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Key.column

Annotation Element javax.jdo.annotations.Key String column Name of the column to store the key in. Returns: name of the column to store the key in Default value: "" Since: JDO 2.1
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Unique.deferred

Annotation Element javax.jdo.annotations.Unique String deferred Whether this unique constraint is deferred until commit. Returns: whether this unique constraint is deferred until commit Default value: "" Since: JDO 2.1
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Element.embedded

Annotation Element javax.jdo.annotations.Element String embedded Whether this element is embedded. Returns: whether this element is embedded Default value: "" Since: JDO 2.1
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Join.columns

Annotation Element javax.jdo.annotations.Join Column[] columns Detail definition of the join column(s). This is needed for more than one join column. Returns: the join columns Default value: {} Since: JDO 2.1
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Query.unmodifiable

Annotation Element javax.jdo.annotations.Query String unmodifiable Whether the query is unmodifiable. Returns: whether the query is unmodifiable Default value: "" Since: JDO 2.1
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Discriminator.column

Annotation Element javax.jdo.annotations.Discriminator String column Name of the column for the discriminator Returns: the name of the column for the discriminator 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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