ObjectDB Database Search

Jakarta Persistence (JPA) Annotation Type jakarta.persistence. Table Implemented Interfaces: Annotation Target: Type Specifies the primary table mapped by the annotated entity type. Additional tables may be specified using SecondaryTable or SecondaryTables annotation. If no Table annotation

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyJoinColumn String table (Optional) The name of the table that contains the foreign key column. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join

Jakarta Persistence (JPA) Method in jakarta.persistence.JoinColumn String table (Optional) The name of the table that contains the column. If a table is not specified, the column is assumed to be in the primary table of the applicable entity. Default: If the join is for a OneToOne or ManyToOne

Jakarta Persistence (JPA) Method in jakarta.persistence.MapKeyColumn String table (Optional) The name of the table that contains the column. Defaults: If the map key is for an element collection, the name of the collection table for the map value. If the map key is for a OneToMany or ManyToMany

In this final step we will add a simple table to the report: Open the [Insert Table ] dialog box by dragging a Table  from the [Palette] window and dropping it on the report design (.rptdesign ... ) in the third field and click OK . Fill the table with data by dragging the x and y columns from

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.InheritanceType TABLE _PER_CLASS A table for each concrete entity class. Each concrete class in the hierarchy has its own table , and each entity instance is stored as a single table row. No discriminator column is necessary. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. Table CheckConstraint[] check (Optional) Check constraints to be applied to the table . These are only used if table generation is in effect. Default: {} Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence. Table String comment (Optional) A comment to be applied to the table . This is only used if table generation is in effect. Default: "" Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence. Table String options (Optional) A SQL fragment appended to the generated DDL statement which creates this table . This is only used if table generation is in effect. Default: "" Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence. Table UniqueConstraint[] uniqueConstraints (Optional) Unique constraints 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

Jakarta Persistence (JPA) Method in jakarta.persistence. Table Index[] indexes (Optional) Indexes for the table . These are only used if table generation is in effect. Note that it is not necessary to specify an index for a primary key, as the primary key index is created automatically. Default: {} Since: Jakarta Persistence (JPA) 2.1

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.InheritanceType SINGLE_ TABLE A single table for each entity class hierarchy. Subclasses are stored together with the root class, and each entity instance is stored as a single table row. The concrete subclass represented by a row

Jakarta Persistence (JPA) Method in jakarta.persistence.Column String table (Optional) The name of the table that contains the column. If absent the column is assumed to be in the primary table . Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.TableGenerator String table (Optional) Name of the table that stores the generated id values. Defaults to a name chosen by persistence provider. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. Table String name (Optional) The name of the table . Defaults to the entity name. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. Table String catalog (Optional) The catalog of the table . Defaults to the default catalog. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. Table String schema (Optional) The schema of the table . Defaults to the default schema for user. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.GenerationType TABLE Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness. May be used to generate primary keys of type Long , Integer , long , or int . Since: Jakarta Persistence (JPA) 1.0

, and relationships translate to tables , columns, and foreign keys. While ObjectDB ignores these ORM-specific settings, they remain essential for maintaining compatibility with relational providers. Table and schema definitions Use the following annotations to map entities to database tables and define

The Explorer provides two types of viewer windows for database data. The Table window follows ... window, a bookmark in the Database window, or an object in an open Table or Tree window). You can open a new viewer window by using the Window Open Tree Window and Window Open Table Window commands

might not be used. Therefore, this strategy can result in gaps in the sequence values.nd  The Table Strategy The TABLE strategy is very similar to the SEQUENCE strategy: @Entity @TableGenerator ( name ... ( strategy = GenerationType . TABLE , generator ="tab") @Id long id; } ORM-based JPA providers (such as

the following table : Set 1: JPQL / SQL Set 2: Java / JDO AND && OR || NOT ! JPQL uses SQL notation ... :area Valid operands for the AND operator are TRUE , FALSE , or NULL . The following table shows ... for the OR operator are TRUE , FALSE , or NULL . The following table shows how the OR operator

ObjectDB supports two sets of comparison operators, as shown in the following table : Set 1: JPQL ... , these operator sets also handle NULL values differently. Comparing NULL values The following table shows ... shown in the table ), the operator evaluates to either TRUE or FALSE . In this case, == is equivalent

: Annotation Target: Method, Field Specifies the mapping of an association to an intermediate join table . It is applied to the owning side of an association. A join table is typically used in the mapping ... , and one-to-one associations (both bidirectional and unidirectional). When a join table is used in mapping

Interfaces: Annotation Target: Type Specifies a secondary table for the annotated entity class. Specifying one or more secondary tables indicates that the data for the entity class is stored across multiple tables . If no SecondaryTable annotation is specified, it is assumed that all persistent fields or

Customer class @OneToMany @JoinColumn(name = "CUST_ID") // join column is in the table for Order ... ) The name of the foreign key column. The table in which this column is found depends on the context ... column is in the table of the source entity or embeddable. If the join is for a unidirectional

with it. The main difference between SQL and JPQL is that SQL operates on relational database tables , while JPQL ... , which returns only field values from database tables . This makes JPQL more object-oriented

) is that in JPA data is represented by classes and objects rather than by tables and records as in ... representation in the relational database (as tables and records) and the representation in the Java application

generation: AUTO (default), IDENTITY , SEQUENCE , TABLE , or UUID . Generator definitions Define specific ... , and allocation size. Defines a named primary key generator that uses a specific database table to ensure

requires slow conversions between graphs of Java objects and flat database table rows. Object Relational ... or NetBeans . Forget relational databases, JDBC, drivers, tables , records, ORM tools and mapping

key join column is in the collection table , join table , or table of the target entity that is used ... (Optional) The name of the foreign key column for the map key. The table in which it is found depends ... the collection table for the map value. If the join is for a map key for a ManyToMany entity

that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A table ... has strategy= TABLE and a defaulted generator name . The name of this default generator is the defaulted ... annotation. Example 1: @Entity public class Employee { ... @TableGenerator( name = "empGen", table

a foreign key to join to another table . It is used to join the primary table of an entity subclass in the JOINED mapping strategy to the primary table of its superclass; it is used within a SecondaryTable annotation to join a secondary table to a primary table ; and it may be used in a OneToOne mapping in

Interfaces: Annotation Target: Method, Field Specifies the table that is used for the mapping of collections ... , the columns of the collection table that correspond to the embeddable class or basic type are derived ... ; ... @ElementCollection // use default table (PERSON_NICKNAMES) @Column(name = "name", length = 50) protected Set

) The name of the map key column. The table in which it is found depends upon the context. If the map key is for an element collection, the map key column is in the collection table for the map value ... table , the map key column is in a join table . If the map key is for a OneToMany entity relationship

. The embedded state is stored in the same table as the owning entity. Specifies a collection field or

that ability and require multiple tables , multiple records and join operations in order to support

Most Jakarta Persistence configuration is static, defined through annotations (e.g., @Entity , @ Table ) or set globally at the persistence unit level during bootstrapping . This section describes dynamic options that control runtime behavior and allow you to adjust settings per session, query, or

objects (and graphs of objects) in an ObjectDB database directly. There's no need to define tables

annotations: Annotations for mapping objects to relational tables , columns, and foreign keys

Jakarta Persistence (JPA) supports both optimistic locking and pessimistic locking . Locking is essential to avoid update collisions when concurrent users simultaneously update the same data. In ObjectDB each entity is locked separately, there is no table locking. Optimistic locking is applied

Since: Jakarta Persistence (JPA) 1.0 Enum Constants JOINED A table for each abstract or concrete entity class ... class in the hierarchy has its own table , but that table does not contain columns mapped to inherited fields or properties, and so the state of an entity instance might be stored across multiple table

interface may not be designated as an entity. An entity has a primary table , mapped using the Table annotation, and may have one or more secondary tables , mapped using the SecondaryTable annotation ... type maps to a single column in one of the tables mapped by the entity, a field of property

; } Example 2: @Column(name = "DESC", columnDefinition = "CLOB NOT NULL", table = "EMP_DETAIL") @Lob ... . This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key ... entailed by the primary key mapping and to constraints specified at the table level. Default: false

Interfaces: Annotation Target: Type Specifies multiple secondary tables for an entity. Example 1: Multiple secondary tables assuming primary key columns are named the same in all tables . @Entity @ Table (name ... _HIST")}) public class Employee { ... } Example 2: Multiple secondary tables with differently named

table , the joinTable element must be specified to override the mapping of the join table and/or ... of the relationship. The joinColumns element must not be specified if a join table is used in the overriding ... corresponding to the joinColumns element when table generation is in effect. If both this element

owned by the entity that are contained in join tables are locked if the property jakarta.persistence ... such a relationship or element collection generally locks only the rows in the join table or collection table for that relationship or collection. This means that phantoms are possible. Since: Jakarta

, 12), ..., (20, 20) The data will be presented in the BIRT report using a chart and a table :

to see the chart with the real data: In the next step we will add a table view of the same data to the report.

the OK button. In the next steps we will use this data set to build a chart and a table .