ObjectDB Database Search

@Index and @ Unique annotations to define indexes. Note that JPA's @Index annotation cannot be applied to fields. import javax.jdo.annotations.Index; import javax.jdo.annotations. Unique ; @Entity public class EntityWithSimpleIndex { @Index String indexedField1; @Index ( unique ="true") int indexedField2

Jakarta Persistence (JPA) Method in jakarta.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

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyJoinColumn boolean unique (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 is only a single field. Default: false Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.JoinColumn boolean unique (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 is only a single field. It is not necessary

Jakarta Persistence (JPA) Method in jakarta.persistence.Column 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

Jakarta Persistence (JPA) Method in jakarta.persistence.Index boolean unique (Optional) Whether the index is unique . Default: false Since: Jakarta Persistence (JPA) 1.0

Why does the below code not enforce unique restrictions?   Person @Entity @ Unique (members ... ;    }     }     @Entity     @ Unique ... to commit transaction: Unique constraint (com.objectdb.test.bug.forum.T1522$Person[name,surname

How to apply Unique constraints on embedded fields? @Entity public class A { private B b ... ; how can i apply unique in values?   Thanks   Manoj Manoj Kumar Maharana Uniqueness ... A . Something like: @Entity @ Unique (members={"b.c.values"}) @Entity public class A {     private B b

I am trying to do the following: @javax.persistence.Entity public class Account { @ Unique () private String name; @ Unique (members={"SalesforceID","sport"}) private String SalesforceID; private String sport; ... } The first Unique constraint works. On commit, an exception is thrown if an Account

Hi, I'm trying to create a unique constraint. Here is a simple example: @Entity public class Account { @Id @GeneratedValue private long id; @Index( unique ="true") private String name; } The code runs ... need to do to have a Unique constraint? Thanks, Carl   FastModel Ben Schreiber On a hunch, I tried

What is the best practice for when you need to add a new unique column to an existing database? Simply adding the column with the @ Unique annotation will result in "Attempt to reuse an existing ... , THEN add the @ Unique constraint.  I'm hoping there's a better way, like providing a means

I have a entity Person have 2 fields Name( Unique ) and PhoneNumbers. I wants to allow null value ... , so indeed, for a unique field you cannot have more than one  null value. If you need multiple null values then the field should not be defined as unique . support Support How can i apply Unique in not null value

Hello, I encounter an issue with the @ Unique annotation. The annotation was added on a given ... were already added to the table). As a consequence the unique constraint is not taken into account ... " the @ Unique constraint on all object already present in the table, including those made before annotation

I'm using ObjectDB 2.5.6_02 and running into a bug with a JDO @ Unique constraint.  I'm using JPA in general. I have an EJB persisting two entities with @TransactionAttribute ... for the field with the @ Unique constraint. The unique constraint causes an exception as expected, but I

For the purposes of this Privacy Policy: Account  means a unique account created for You to access ... Data may include information such as Your Device's Internet Protocol address (e.g. IP address), unique ... automatically, including, but not limited to, the type of mobile device You use, Your mobile device unique ID

Immediately retrieve unique id

: ObjectDB is unique in supporting the standard APIs. It is the only object database with built in ... is also unique in supporting features that are usually available only in relational databases. For example

a primary key for each new entity. These generated values are unique at the database level ... a separate generator for each type hierarchy, so the generated values are unique

sessions). Unique data structures and algorithms (as a result of years of R&D). Outperforms competing ... in ObjectDB is unique compared to other Objec-Oriented Databases. Primary Key Modes Hidden

databases. Entity identification Every entity in the database is uniquely identified and can be retrieved by the combination of its type and its primary key. Primary key values must be unique for each

). It is defined on an entity or mapped superclass and assigned a unique name for retrieval

") public class MyEntity { } Entity names must be unique . When two entity classes in different

. Represents an attribute typed as a java.util.Set , implying unique elements without a specific order

and primary key Every entity can be uniquely identified and retrieved by the combination of its class

you can keep your application portable. The unique benefit of using ObjectDB is that the overhead of an intermediate ORM

, you should choose names carefully to avoid collisions, for example, by using the unique entity name as

uniqueness . Use this generator when the underlying database doesn't support sequences or identity

ObjectDB is a unique NoSQL database. It doesn't have the known disadvantages and limitations of NoSQL technology, which are weak query capabilities and lack of ACID (atomicity, consistency, isolation, durability). Unlike other NoSQL solutions, ObjectDB provides full support of rich complex queries

. A container annotation for defining multiple @SecondaryTable entries. Specifies a unique constraint

You can use Jakarta Persistence (JPA) annotations to mark classes as persistent and to configure their behavior. Persistent type definitions Use these annotations to assign a role to a persistent class: Marks the class as an entity. Entities are persistent domain objects with a unique identity

, where each group has a unique combination of values. Aggregate calculations ( COUNT , SUM , AVG , MAX , MIN

, you must generate at least two files: A keystore file that contains the server's unique signature. This file

key has a unique constraint with an index created automatically. See Also: Table SecondaryTable ... , following the BNF rule column_list given above. Since: Jakarta Persistence (JPA) 1.0 boolean unique (Optional) Whether the index is unique . Default: false Since: Jakarta Persistence (JPA) 1.0 String

of the referenced table. Default: "" Since: Jakarta Persistence (JPA) 1.0 boolean unique (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 is only a single field. It is not necessary

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

unique (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 is only a single field

Persistence (JPA) 1.0 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

maps a unique foreign key relationship, either a foreign key column or columns with a unique constraint ... (optional = false) @JoinColumn(name = "CUSTREC_ID", unique = true, nullable = false, updatable

I found that it is impossible to insert a record with @ Unique byte[] var; after initial insertion ... to commit transaction: Unique constraint (id.co.ecoin.test.objectdb.ObjectDbTest$OdbByteArray[key ... .objectdb.o.UserException: Unique constraint (id.co.ecoin.test.objectdb.ObjectDbTest$OdbByteArray

database table to ensure uniqueness . May be used to generate primary keys of type Long , Integer ... must assign primary keys for the entity by generating an RFC 4122 Universally Unique IDentifier

explains how to use TableGenerator . Annotation Elements String name (optional) A unique generator ... [] uniqueConstraints (Optional) Unique constraints that are to be placed on the table. These are only used if table

If i annotate a getter with: @Column( unique = true) it's simply ignored. If i use @ Unique it works perfectly. mosi0815 Ralph Moser Usually ObjectDB silently ignores ORM annotations. This is not ... more difficult - setting unique by using the @Column annotation is now supported (starting build 2.3.2_04). support Support

Query doesn't return results in versions 2.9.x when there's a unique property in (where/and .. or ..) clause. It ignores the or operator. @Entity public class User { .. @ Unique private String ... (probably generated for the @ Unique annotation you mentioned). However, both query plans seems correct

I am very often getting a "com.objectdb.o._NoResultException: No matching results for a unique query" when modifying my already persisted entities within a transaction. I cannot replicate it however because it happens infrequently. The weird thing is that the entity nevertheless gets comitted

at a customer the unique object id of one class changed dramatically from a nurmal number to an incredible number which, for sure, cannot be used any more, see screenshot the database is available here https://www.dropbox.com/scl/fi/564zgf7ubm1yh6kp2wxoi/coreSystemDb.7z?rlkey

) Since: Jakarta Persistence (JPA) 2.1 UniqueConstraint[] uniqueConstraints (Optional) Unique

then it is expected to have a uniqueness constraint associated with it. The MapKeyClass annotation is not used

entity. Entity graph names must be unique within the persistence unit. Default: "" Since: Jakarta

, a one-to-one association usually maps to a unique foreign key relationship (sometimes using a shared primary key

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.UniqueConstraint Implemented Interfaces: Annotation 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