ObjectDB Database Search

Hi! I've just started to architect a new system, stateless JSON API, which is expected to have very high load and to require more servers for parallel deployments (same app across multiple servers). I am considering using ObjectDB, because of its advantages and easy usage, but I'm afraid

); seems like objectdb doesnt support multiple where clauses ? "UPDATE LoginEntity u SET u.enabled = ?1

CriteriaQuery .where() for multiple conditions

Multiple Collection Fields not update correctly

multiple different applications access one odb file

Get multiple entities by Id

multiple LEFT JOINs do not work as expected

100% CPU when using multiple BETWEEN

Multiple @ID

Access to client/server database from multiple applications

Maven and multiple JARs

InternalError on multiple AND and JOIN Query

. However, the same method can handle multiple callback events if it is marked with more than one callback ... MyEntityWithListener { } You can attach multiple listener classes to a single entity: @Entity ... NoDefaultListenersForThisEntityEither extends NoDefaultListenersForThisEntity { } Callback invocation order When multiple callback

multiple fields in the members attribute of the @Index or @Unique annotation: @Entity @Index ( members ... annotation to either the class or any persistent field in the class. You can wrap multiple @Index ... { String firstName; String lastName; } Similarly, the @Uniques annotation can wrap multiple @Unique

multiple elements in the same configuration. This allows the same configuration file, with multiple activation codes, to be used on multiple computers. Note: If you are using an ObjectDB OEM license

propagated to the database. Multiple SELECT expressions The SELECT clause may also define composite ... for queries with multiple SELECT expressions, where custom result objects can provide an object ... multiple selections and builds a CompoundSelection instance based on the expected query results

explicitly in the name element of the @Entity annotation. Multiple range variables are allowed ... , c2 FROM Country c1, Country c2 WHERE c2 MEMBER OF c1.neighbors Multiple variables are equivalent ... countries. Caution is required when using multiple range variables. Iteration over about 1,000,000

that ability and require multiple tables, multiple records and join operations in order to support multiple values (even for a simple data structure such as a collection of strings). In addition

of the persistence context: TRANSACTION (default) or EXTENDED (spanning multiple transactions). A container annotation for declaring multiple @PersistenceContext definitions on a single class ... metadata. A container annotation for declaring multiple @PersistenceUnit definitions on a single class

with different parameter values to retrieve different results. Executing the same query multiple times ... indicates that the type of :name is also String . Queries can include multiple parameters, and each parameter can appear multiple times in the query string. A query can be executed only after you set values

cannot be shared by multiple entities. Each containing entity must have its own embedded objects ... can reference multiple entities. @Entity class Employee { : @OneToOne ( cascade = CascadeType . PERSIST

only once, even if they are referenced multiple times. Referencing instances of other persistable types from multiple persistent fields causes data duplication in the database. Entity classes An entity class

: + (addition), - (subtraction), * ( multiplication ), and / (division). ObjectDB also supports the modulo ... // Multiplication (*) Expression prod1 = cb. prod (path, param); // 2 expressions Expression prod2 = cb. prod

dialect. Groups multiple @NamedNativeQuery definitions on a single class. Result set mapping Map ... multiple @SqlResultSetMapping definitions. Mapping details Refine the mapping of specific columns

for performing database operations. Many applications require multiple database connections ... ) and provides an efficient way to create multiple EntityManager instances for that database. The instantiation

to run this query, as it can return multiple objects: TypedQuery query = em. createQuery ("SELECT c FROM ... multiple Country objects with the name 'Canada', a NonUniqueResultException is thrown. If no matching

WHERE and HAVING clauses. An enum defining the logical operators ( AND , OR ) used to combine multiple

) ObjectDB uses automatic optimistic locking to prevent concurrent changes to entities by multiple users

. A container annotation that groups multiple @NamedQuery definitions on a single class. Supplies parameters

ObjectDB supports master-slave replication, also known as clustering. With replication, the same database is managed on multiple computers, or nodes, which can be in different geographic locations. This configuration helps achieve high availability, fault tolerance, and prompt disaster recovery

: * ( multiplication ), / (division), + (addition), and - (subtraction) Comparison operators

is global to the application and can be used by multiple fields across different classes. Specify

that are referenced by that field. Multiple entities can be referenced by a collection field. @Entity class

{ ... } To attach multiple named queries to the same entity class, wrap them in a @NamedQueries annotation

cannot include multiple variables, JOIN clauses, or the GROUP BY , HAVING , and ORDER BY clauses

. get ("population"), p)); Multiple restrictions The second where method takes a variable number of Predicate

has inheritance, multiple subgraphs can be specified. These additional subgraphs are intended to add subclass ... NamedSubgraph element. If multiple subgraphs are specified due to inheritance, they are referenced by ... also being specified. If the target type has inheritance, multiple subgraphs can be specified. These additional

to seperate files ( Each file is binded to different disk ) How can i configure objectdb for multiple ... so you cannot split a database to multiple disks unless you split the database itself to multiple ... .g. temporary files, recovery file) to other disks. using replication with multiple servers

]) / '826268'*:notNull]) / Is there a way to stop ObjectDB from doing multiple index scans, and only pick ... ObjectDB from doing multiple index scans, and only pick the best single index with highest selectivity ... that scan multiple indexes. In our data design, where every entity has an indexed deleted flag

) Add a node to the graph that corresponds to a managed type with inheritance. This allows for multiple ... with inheritance. This allows for multiple subclass subgraphs to be defined for this node of the entity ... that corresponds to a managed type with inheritance. This allows for multiple subclass subgraphs to be defined

specify the converter class, except to disambiguate cases where multiple converters ... must be specified. To override conversion mappings at multiple levels of embedding, a dot ... if multiple converters would otherwise apply. Default: jakarta.persistence.AttributeConverter/class

that corresponds to a managed type with inheritance. This allows for multiple subclass subgraphs to be defined ... to a managed type with inheritance. This allows for multiple subclass subgraphs to be defined for this node ... to a managed type with inheritance. This allows for multiple subclass subgraphs to be defined

attribute also being specified. If the target type has inheritance, multiple subgraphs can be specified ... specified by the name element of the corresponding NamedSubgraph element. If multiple key subgraphs

to inherited fields or properties, and so the state of an entity instance might be stored across multiple table

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.ManyToMany Implemented Interfaces: Annotation Target: Method, Field Specifies a many-valued association with many-to-many multiplicity , mapping to an intermediate table called the join table . Every many-to-many association

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.ManyToOne Implemented Interfaces: Annotation Target: Method, Field Specifies a single-valued association to another entity class that has many-to-one multiplicity . It is not usually necessary to specify the target entity explicitly

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.NamedNativeQueries Implemented Interfaces: Annotation Target: Type Declares multiple native SQL named queries. Query names are scoped to the persistence unit. The NamedNativeQueries annotation can be applied to an entity or mapped

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Converts Implemented Interfaces: Annotation Target: Method, Field, Type Used to group Convert annotations. Multiple converters must not be applied to the same basic attribute. See Also: Convert Since: Jakarta Persistence (JPA) 2.1

(); pm.makePersistent(person); pm.currentTransaction().commit(); Multiple objects can become persistent, either by multiple calls to makePersistent( ... ) , or by passing a collection or array ... cannot be shared by references from multiple objects. In addition, embedded objects of persistent

can be accessed by multiple processes simultaneously. In addition, the server supports accessing ... server only from the computer on which the server process is running. Multiple IP addresses ... Configuration Similar to a web server, which can serve either a single website or multiple websites