About unique

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JDO Doc
10

javax.jdo.Query

of results, and flags indicating whether the query result is unique and whether the query can be modified ... in the type namespace. Imported type names must be unique. When used (e.g. in a parameter declaration ... declareParameters hides the name of a candidate class field of the same name. Parameter names must be unique
JDO Doc
9

javax.jdo.annotations.Element

unique Whether a unique constraint should be generated or assumed. Whether a unique constraint should be generated or assumed. Returns: whether a unique constraint should be generated or assumed Default value: "" Since: JDO 2.1 String uniqueKey The name of the unique key constraint to generate
JDO Doc
9

javax.jdo.annotations.Join

: "" Since: JDO 2.1 String unique Whether the join column is unique. Whether the join column is unique. Returns: whether the join column(s) is(are) is unique Default value: "" Since: JDO 2.1 String uniqueKey The name of the unique key constraint to generate. The name of the unique key constraint to generate
JDO Doc
9

javax.jdo.annotations.Key

Default value: {} Since: JDO 2.1 String unique Whether the element column(s) contents should be considered unique Whether the element column(s) contents should be considered unique Returns: whether the element column(s) contents should be considered unique Default value: "" Since: JDO 2.1 String
JDO Doc
9

javax.jdo.annotations.Value

value: {} Since: JDO 2.1 String unique Whether the element column(s) contents should be considered unique Whether the element column(s) contents should be considered unique Returns: whether the element column(s) contents should be considered unique Default value: "" Since: JDO 2.1 String uniqueKey
JDO Doc
7

javax.jdo.annotations.ForeignKey

String unique Whether this foreign key is unique. Whether this foreign key is unique. Returns: whether this foreign key is unique Default value: "" Since: JDO 2.1 ForeignKeyAction updateAction
JDO Doc
7

javax.jdo.annotations.Index

: the table on which the index is defined Default value: "" Since: JDO 2.1 String unique Whether this index is unique Whether this index is unique Returns: whether this index is unique Default value: "" Since: JDO 2.1
JDO Doc
7

javax.jdo.annotations.Query

of the result Default value: void.class Since: JDO 2.1 String unique Whether the query returns a single unique result. Whether the query returns a single unique result. Returns: whether the query returns a single unique result Default value: "" Since: JDO 2.1 String unmodifiable Whether the query
JPA Doc
7

javax.persistence.Column

value: "" Since: JPA 1.0 boolean unique (Optional) Whether the column is a unique key. (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
JPA Doc
7

javax.persistence.JoinColumn

of the collection table. Default value: "" Since: JPA 1.0 boolean unique (Optional) Whether the property is a unique key. (Optional) Whether the property 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