ObjectDB Database Search

servers, it may be faster for local files. 3 . On the Query page, please add a checkbox to request ... expressions in the execution tab. Try the following query : SELECT 2 + 3 . This is currently ... to do ad-hoc JPQL queries and navigate through the results and even make small changes to primitive

query =  (TypedQuery ) this.dbService.createNamedQuery("RuleValueNode.findRoot", RuleValueNode ... .findRoot", query = "SELECT rvn FROM RuleValueNode rvn where rvn.parent is null"),   @NamedQuery(name = "RuleValueNode.findNotNodes", query = "SELECT rvn FROM RuleValueNode rvn where rvn.value.not

ObjectDB 2. 3 has been released and it includes important additions and fixes: Added the ability to edit databases in the Explorer ( issue #2 ). Added the ability to execute queries in the Explorer (issue # 3 ). Other small Explorer improvements. Added support of IN operator in JPQL queries . Added

Jakarta Persistence (JPA) Method in jakarta.persistence. Query Object getParameterValue (    int position ) Return the input value bound to the positional parameter. (Note that OUT parameters are unbound.) Parameters: position - position Returns: parameter value. Throws

Jakarta Persistence (JPA) Method in jakarta.persistence. Query boolean isBound (    Parameter param ) Return a boolean indicating whether a value has been bound to the parameter. Parameters: param - parameter object Returns: boolean indicating whether parameter has been bound. Since: Jakarta Persistence (JPA) 2.0

The GROUP BY clause groups query results. A JPQL query with a GROUP BY clause returns properties of the resulting groups instead of individual objects and fields. In the query execution order ... . When a query includes a GROUP BY clause, the database objects (or tuples) that result from the FROM clause

Persistence (JPA) 3 .2 boolean isDistinct () Return whether duplicate query results must be eliminated or ... removed. Parameters: restrictions - a list of zero or more restriction predicates Returns: the modified query . Since: Jakarta Persistence (JPA) 3 .2 ... functionality that is common to both top-level queries and subqueries. It is not intended to be used

Object.class meaning all queries Returns: a map keyed by query name. Since: Jakarta Persistence (JPA) 3 ... , may be obtained by calling getCache , the CriteriaBuilder , used to define criteria queries , may be obtained by ... name , Query query ) Define the query , typed query , or stored procedure query as a named query

and inheritance relationships. Jakarta Persistence (JPA) 3 .2 Core Types Bootstrapping and Configuration ... ) and close it upon shutdown. The primary interface for performing CRUD operations, building queries

it to view data, execute JPQL and JDOQL queries , and edit database content. Running the Explorer ... (entity and embeddable classes) in the database and their persistent fields and indexes. The Query window lets you run JPQL and JDOQL queries , as discussed later. Closing a database connection To close

for retrieving a specific subset of objects from the database. How a WHERE clause works The following query ... FROM Country c WHERE c.population :p The FROM clause of this query defines an iteration ... to the SELECT clause to be collected as query results, the WHERE clause acts as a filter. The boolean

The ORDER BY clause specifies the order for the query results. Any JPQL query that does not ... expressions The following query returns the names of countries with a population of at least one million ... If a query includes an ORDER BY clause, it is the last clause to be executed. The FROM clause first

dynamic options that control runtime behavior and allow you to adjust settings per session, query , or ... every operation in that session. Query (definition): Settings applied to a Query object override session defaults for that query . Operation (argument): Settings passed to specific EntityManager operations ( find

Interfaces: Annotation Target: Type Declares a named native SQL query and, optionally, the mapping of the result of the native SQL query . Query names are scoped to the persistence unit. A named query ... how the native SQL query result set should be interpreted, for example: @NamedNativeQuery( name

, which modify the database. For debugging query failures, you might need to record "all" operations to reproduce ... can use the new indexes to accelerate relevant queries . The element The element specifies settings for the two query cache mechanisms that ObjectDB manages: The results attribute specifies the size

numbers, booleans, strings, and dates. Values of simple types are more useful in queries ... private, which is usually the case. Navigation through a NULL value The following query retrieves country ... variables) is skipped. To better understand how this works, consider the equivalent JOIN query

, TupleElement Type of criteria query parameter expressions. Since: Jakarta Persistence (JPA) 2.0 Public ... of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ... . Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate to test

query construction. Since: Jakarta Persistence (JPA) 2.0 Public Instance Methods Selection alias ... Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2

, TupleElement A root type in the from clause. Query roots always reference entities. Since: Jakarta ... of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ... . Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate to test

of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Expression entry () Create an expression ... to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 ... testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch ( SingularAttribute attribute

. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 ... testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch ( SingularAttribute attribute

of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create ... . Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate to test ... against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch

. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... - expression to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 ... : predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch ( SingularAttribute

) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test whether the expression ... against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ... . Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch ( SingularAttribute attribute ) Create a fetch join

of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create ... . Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate to test ... to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Fetch fetch

its persistence context, it returns the existing managed object without querying the database. Otherwise, JPA ... , getReference might return a hollow object instead of querying the database immediately. It never returns null ... an entity and another for checking a persistent field of an entity. Retrieval by query The Query

Improved compilation performance of OR queries with many elements. Fixed eager fetch of maps and nested embedded objects. Fixed a bug in removing a new flushed entity object before first commit ( issue #562 ). Fixed a NullPointerException in accessing inverse (mapped by) collection fields

Querying without indexes requires sequential iteration over entities in the database. If many ... this full iteration, allowing complex queries over millions of objects to execute quickly ... lastName; Address address; : } Indexes in queries ObjectDB manages a B-tree for every index. A B-tree

: - the type of the expression Super Interfaces: Selection , TupleElement Type for query expressions. Since: Jakarta Persistence (JPA) 2.0 The JPA Query Expressions (JPQL / Criteria) article explains ... (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test whether the expression

Logical operators in JPQL and JPA criteria queries combine simple Boolean expressions to form ... , while Java uses its own notation, which is also used by the JDO Query Language (JDOQL). ObjectDB supports both notations. Binary AND (&&) operator The following query retrieves countries whose population

You can start an online backup by executing a special query on an EntityManager ( em ) instance ... ").getSingleResult(); The backup query string is always "objectdb backup" . The backup is created in the backup ... a custom backup root directory by setting the target parameter before you execute the backup query

locking wait times. Query exceptions Exceptions specific to query execution and result retrieval: Thrown by Query .getSingleResult() when the query returns no results. Thrown by Query .getSingleResult() when the query returns more than one result. Thrown when a query exceeds the specified timeout limit

Returns: a scalar expression of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate ... testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create ... Persistence (JPA) 3 .2 String getAlias () Return the alias assigned to the tuple element or null

type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate ... Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate to test whether the expression ... against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 String getAlias () Return

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 , using two standard Java query languages: JPQL (Java Persistence Query Language) and JDOQL (JDO

expression of the given basic type. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ... for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate equalTo ( Object value ) Create a predicate ... ) 3 .2 Path get ( SingularAttribute attribute ) Create a path corresponding to the referenced single

Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate ... for equality. Since: Jakarta Persistence (JPA) 3 .2 String getAlias () Return the alias assigned

Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate ... for equality. Since: Jakarta Persistence (JPA) 3 .2 String getAlias () Return the alias assigned

Persistence (JPA) 3 .2 Predicate equalTo ( Expression value ) Create a predicate to test ... to be tested against Returns: predicate testing for equality. Since: Jakarta Persistence (JPA) 3 .2 Predicate ... testing for equality. Since: Jakarta Persistence (JPA) 3 .2 String getAlias () Return the alias assigned

do not support aggregate queries (max, min, count, sum and avg). ObjectDB supports rich queries , including aggregate queries , as part of its support of JPQL (JPA Query Language) and JDOQL (JDO Query Language). ObjectDB is faster than other products.

and provide better support for automatic change tracking. UPDATE queries UPDATE queries provide an alternative way to update entities in the database. Using an UPDATE query is useful, especially when you must modify many entities in a single operation. The UPDATE Queries in JPA/JPQL section in Chapter 4 explains how to use JPA UPDATE queries .

queries in the Explorer (issue # 3 ). Other small Explorer improvements. Added support of IN operator in JPQL queries . Added support of ";drop" database url parameter. Adjusted the Enhancer to the new ... to memory leak ( issue #453 ). Completed missing documentation (e.g. UPDATE & DELETE queries ). Fixed

JDO 3 introduces the ability to specify and query metadata of persistable types dynamically. ObjectDB 2 supports specifying metadata by: JPA XML Mapping Metadata JPA Annotations JDO XML Metadata (e ... generated classes. In addition, the metadata of classes can be queried at runtime (similarly to reflection in Java). support Support

Added support of DATE(...) and TIME(...) methods in queries . Added new Explorer and Server exe (for Windows 7 and 64 bits). Fixed handling a Calendar parameter value in criteria queries . Fixed using type operator and literals in client server queries ( issue #605 ). Fixed eager fetch issues. Fixed

; toString of criteria queries to use aliases ( issue #12 7). Fixed automatic variable naming in criteria queries ( issue #640 ). Fixed a bug in handling mapped super classes. Fixed bugs in using casting in queries (including issue #642 and issue #646 ). Fixed bugs in processing JOIN queries (including

for Java EE Developers. GlassFish Server 3 .0.1 (or above). The last version of ObjectDB (just download and extract). The tutorial was written for Eclipse 3 .6.1 but it should work with other Eclipse versions ... : ObjectDB 2. 3 .7_04 or later is required if Glassfish 3 .1.2 (or later) is used. The Tutorial Steps This tutorial consists of the following steps:

a list of strings in a database. 2 3 import java.util.*; 4 import javax.jdo.*; 5 import com ... .currentTransaction().commit(); 38 pm.close(); 39 } 40 } How it works   Lines 3 -5 Three import statements are required: for Java collections (line 3 ), for JDO (line 4) and for ObjectDB extensions

.springframework spring-webmvc 3 .0.5.RELEASE org.springframework spring-tx 3 .0.5.RELEASE org.springframework spring-orm 3 .0.5.RELEASE aopalliance aopalliance 1.0 cglib cglib 2.2 org.aspectj aspectjweaver

       org.springframework    spring-webmvc    3 .0.5.RELEASE        org.springframework    spring-tx    3 .0.5.RELEASE        org.springframework    spring-orm    3 .0.5.RELEASE

a Project Name (e.g. Guestbook ). Select GlassFish Server Open Source Edition 3 (Java EE 6) as the Target runtime. Note: You may have to add GlassFish 3 as a new server by clicking the New Runtime... button ... to GlassFish 3 (which has to be downloaded separately) . Click the Finish button to create the Java EE 6