About unique

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JPA Doc
3

javax.persistence.spi.PersistenceUnitInfo

, be uniquely named and be resource-loadable from the application classpath. Each mapping file name
JPA Doc
3

javax.persistence.UniqueConstraint

javax.persistence Annotation UniqueConstraint Target: Specifies that a unique constraint is to be included in the generated DDL for a primary or secondary table. Example: @Entity @Table( name="EMPLOYEE", uniqueConstraints= @UniqueConstraint(columnNames={"EMP_ID
JPA Doc
3

JoinTable.uniqueConstraints

Annotation Element javax.persistence.JoinTable UniqueConstraint[] uniqueConstraints (Optional) Unique constraints that are to be placed on the table. These are only used if table generation is in effect. Defaults to no additional constraints. Default value: {} Since: JPA 1.0
JPA Doc
3

SecondaryTable.uniqueConstraints

Annotation Element javax.persistence.SecondaryTable UniqueConstraint[] uniqueConstraints (Optional) Unique constraints that are to be placed on the table. These are typically only used if table generation is in effect. These constraints apply in addition to any constraints specified by the Column
JPA Doc
3

SequenceGenerator.name

Annotation Element javax.persistence.SequenceGenerator String name (Required) A unique generator name that can be referenced by one or more classes to be the generator for primary key values. Since: JPA 1.0
JDO Doc
3

setFilter(filter)

. The user may denote uniqueness in the filter expression by explicitly declaring an expression
JPA Doc
3

Table.uniqueConstraints

Annotation Element javax.persistence.Table UniqueConstraint[] uniqueConstraints (Optional) Unique constraints that are to be placed on the table. These are only used if table generation is in effect. These constraints apply in addition to any constraints specified by the Column and JoinColumn
JPA Doc
3

TableGenerator.name

Annotation Element javax.persistence.TableGenerator String name (Required) A unique generator name that can be referenced by one or more classes to be the generator for id values. Since: JPA 1.0
JPA Doc
3

TableGenerator.uniqueConstraints

Annotation Element javax.persistence.TableGenerator UniqueConstraint[] uniqueConstraints (Optional) Unique constraints that are to be placed on the table. These are only used if table generation is in effect. These constraints apply in addition to primary key constraints. Defaults to no additional constraints. Default value: {} Since: JPA 1.0
Forum
3

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

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