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variable that serves as a root and additional join variables that are bound to path expressions ... variables are represented by the Root interface. Join variables are represented by the Join interface (and its sub interfaces). Criteria Query Roots The CriteriaQuery 's from method serves as a factory

JPA Interface Root Type Parameters: - the entity type referenced by the root Super Interfaces: FetchParent , From A root type in the from clause. Query roots always reference entities. Since: JPA 2.0 The FROM clause (JPQL / Criteria API) article explains how to use Root . Public Methods EntityType

JPA Method in jakarta.persistence.criteria.CriteriaBuilder Root treat (    Root   root ,    Class  type ) Downcast Root object to the specified type. Parameters: root - root type - type to be downcast to Return: Root object of the specified type Since: JPA 2.1

JPA Method in jakarta.persistence.criteria. Root EntityType getModel () Return the metamodel entity corresponding to the root . Return: metamodel entity corresponding to the root Since: JPA 2.0

Hi, I have a grove-like structure of objects, every objects referencing its parent. Root objects have null as the value of this parent reference. To find the roots I execute a query. If the number of objects in the tree is significant, this query takes almost forever, it seems ObjectDB loads

its subinterfaces ( From , Root , Join and Join 's descendants). Path Expressions The Root and Join interfaces ... Variable Paths: Root country = query. from (Country.class); Join neighborCountry = country. join ... ( Root , Join ) - The creation of a FROM expression automatically modifies the query by adding

.class); Root c = q. from (Country.class); q. select (c. get ("currency")). distinct (true ... . createQuery (Object[].class); Root c = q. from (Country.class); q. select (cb. array (c. get ("name ... = cb. createTupleQuery (); Root c = q. from (Country.class); q. select (cb. t uple (c. get ("name"), c

"objectdb backup" . The backup is created under the backup root directory, which by default ... that reflects the current date and time (e.g.  201912312359 ) is created under the backup root ...  (if c:\objectdb is the ObjectDB home directory). Custom Backup Target A custom backup root

); Root c = q. from (Country.class); q. select (c); The CriteriaBuilder interface serves as the main ... for representing the built query. Then a Root  instance is created to define a range variable in the FROM ... = cb. createQuery (Country.class); Root c = q. from (Country.class); ParameterExpression p = cb

databases on the slave server are automatically generated under a special root directory, $replication , under the server data root directory. Starting a new replication of an existing master database

to the document root directory of a web server. Every database file in the data directory and in

;function returns a long value). The SQRT Function The SQRT function returns the square root

); Root c = q. from (Country.class); q. select (c); ParameterExpression p = cb. parameter (Integer

, relative to the server data root path. Connection URL Parameters The following parameters

The ObjectDB configuration file contains one root element with seven subelements: ... ... ... ... ... ... ... Each one of these seven configuration elements is explained in a separate section: This page explains how ObjectDB configuration works in general. The Configuration Path By default

using the criteria query API as follows: CriteriaQuery q = cb. createQuery (Country.class); Root c = q

packed in a JAR yet, ObjectDB (as an extension) automatically registers classes under the classpath root

path attribute specifies a directory path relative to the root data directory. Permission to access

); Root c = q. from (Country.class); q. select (c); q. orderBy (cb. asc (c. get ("currency")), cb. desc

variables (bound by an entity class) are represented by the Root subinterface: Join variables (bound by

.TransactionRequiredException Exception Class Overview The root of the JPA exception class subtree is: General errors

. Parameters: parentMap - join object of the containing query Return: subquery join Since: JPA 2.0 Root correlate ( Root  parentRoot) Create a subquery root correlated to a root of the enclosing query. Parameters: parentRoot - a root of the containing query Return: subquery root Since: JPA 2.0 SetJoin

must have: a set of root entities (which may in turn own joins). All queries may have: a conjunction ... Since: JPA 2.0 Root from (Class  entityClass) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots . Parameters: entityClass - the entity

.0 Root from (Class  entityClass) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots . Parameters: entityClass - the entity class Return: query root corresponding to the given entity Inherited from: AbstractQuery Since: JPA 2.0 Root

of the bulk delete. A CriteriaDelete object must have a single root . Since: JPA 2.1 Public Methods Root from (Class  entityClass) Create and add a query root corresponding to the entity that is the target of the DELETE. A CriteriaDelete object has a single root , the entity that is being deleted

synchronized with the result of the bulk update. A CriteriaUpdate object must have a single root . Since: JPA 2.1 Public Methods Root from (Class  entityClass) Create and add a query root corresponding to the entity that is the target of the update. A CriteriaUpdate object has a single root

( Expression  x) Create an expression that returns the square root of its argument. Parameters: x - expression Return: square root Since: JPA 2.0 Expression substring ( Expression  x,  ... - path type - type to be downcast to Return: Path object of the specified type Since: JPA 2.1 Root treat

JPA Method in jakarta.persistence.criteria.Subquery Root correlate (    Root  parentRoot ) Create a subquery root correlated to a root of the enclosing query. Parameters: parentRoot - a root of the containing query Return: subquery root Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.AbstractQuery Set getRoots () Return the query roots . These are the roots that are defined for the CriteriaQuery or Subquery itself, including any subquery roots defined as a result of correlation. Returns an empty set if no roots have been defined

JPA Method in jakarta.persistence.criteria.CriteriaDelete Root from (    EntityType  entity ) Create and add a query root corresponding to the entity that is the target of the DELETE. A CriteriaDelete object has a single root , the entity that is being deleted. Parameters: entity

JPA Method in jakarta.persistence.criteria.CriteriaDelete Root from (   Class  entityClass ) Create and add a query root corresponding to the entity that is the target of the DELETE. A CriteriaDelete object has a single root , the entity that is being deleted. Parameters: entityClass

JPA Method in jakarta.persistence.criteria.AbstractQuery Root from (    EntityType  entity ) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots . Parameters: entity - metamodel entity representing the entity of type X

Since: JPA 1.0 boolean excludeUnlistedClasses () Returns whether classes in the root of the persistence ... : whether classes in the root of the persistence unit that have not been explicitly listed are to be included ... the URL for the jar file or directory that is the root of the persistence unit. (If the persistence unit

JPA Method in jakarta.persistence.criteria.AbstractQuery Root from (   Class  entityClass ) Create and add a query root corresponding to the given entity, forming a cartesian product with any existing roots . Parameters: entityClass - the entity class Return: query root corresponding to the given entity Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.CriteriaUpdate Root from (    EntityType  entity ) Create and add a query root corresponding to the entity that is the target of the update. A CriteriaUpdate object has a single root , the entity that is being updated. Parameters: entity

JPA Method in jakarta.persistence.criteria.CriteriaUpdate Root from (   Class  entityClass ) Create and add a query root corresponding to the entity that is the target of the update. A CriteriaUpdate object has a single root , the entity that is being updated. Parameters: entityClass

the  guestbook-jee6 directory as Root Directory and press  ENTER . Select the project and click

-spring directory as Root Directory and press  ENTER . Select the project and click  Finish

; guestbook-web directory as Root Directory and press  ENTER . Select the project and click  Finish

directory as Root Directory and press ENTER . Select the project and click  Finish . Run the project in

JPA Method in jakarta.persistence.criteria.CriteriaDelete Root getRoot () Return the query root . Return: the query root Since: JPA 2.1

plain. This annotation must be applied to the root entity of the graph, and specifies the limits ... or instances of the root entity is executed. A reference to a named entity graph may be obtained by ... of the annotated root entity. Entity graph names must be unique within the persistence unit. Since: JPA 2.1

JPA Interface EntityGraph Type Parameters: - The type of the root entity. Super Interfaces: Graph This type represents the root of an entity graph that will be used as a template to define the attribute nodes and boundaries of a graph of entities and entity relationships. The root

JPA Method in jakarta.persistence.criteria.CriteriaUpdate Root getRoot () Return the query root . Return: the query root Since: JPA 2.1

variables. For example: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class ... ;))); } rather than: {@snippet : CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class); Path

. For example: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class); q.select(p ... : CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class); Path nicknames = p.get("

JPA Method in jakarta.persistence.criteria.CriteriaBuilder Expression sqrt (    Expression  x ) Create an expression that returns the square root of its argument. Parameters: x - expression Return: square root Since: JPA 2.0

: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class); q.select(p) .where(cb ... = cb.createQuery(Person.class); Root p = q.from(Person.class); Path nicknames = p.get("

JPA Method in jakarta.persistence.spi.PersistenceUnitInfo URL getPersistenceUnitRootUrl () Returns the URL for the jar file or directory that is the root of the persistence unit. (If the persistence unit is rooted in the WEB-INF/classes directory, this is the URL of that directory.) The URL

JPA Method in jakarta.persistence.spi.PersistenceUnitInfo boolean excludeUnlistedClasses () Returns whether classes in the root of the persistence unit that have not been explicitly listed ... element in the persistence.xml file. Return: whether classes in the root of the persistence unit