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must be one of: TRUE, FALSE , and NULL . The following table shows how the AND operator is evaluated based on its two operands:   TRUE FALSE NULL TRUE TRUE FALSE NULL FALSE FALSE FALSE FALSE NULL NULL FALSE NULL NULL represents unknown. Therefore, if one operand is NULL and the other operand is FALSE

to false .  If retainValues == true, the code proceeds as expected.  I don't understand ... close operation. The  retainValues == false mode affects commit operations but should not

During the evaluation of ObjectDB (We're currently developing with EclipseLink/mysql) I noticed was the following: I marked a @Column as nullable= false Than I tried to save it with the property ... @JoinColumn(name="alarm_group_id", nullable= false ) private AlarmGroup alarmGroup; bugsbunny2003 Marcel Rokers

recovery enabled="false", still creates tablename.odb$ files

is "true" or " false " ) specifies if a recovery file is used. The sync attribute (whose value is "true" or " false " ) specifies if physical writing is required before commit returns. sync= false ... ). The element specifies the recording settings: The enabled attribute (whose value is "true" or " false

including NULL , boolean literals ( TRUE and FALSE ), numeric literals (e.g. 100 ), string literals ... supports two boolean literals - TRUE and FALSE . Since JPQL is case insensitive, TRUE is equivalent to true and True , and FALSE is equivalent to false and False . Numeric Literals JPQL supports

The element specifies enhancement related settings: The agent attribute (whose value is "true" or " false ... is "true" or " false " ) specifies if lazy loading of entity objects content is enabled. Instantiating ... . The element The serialization attribute of the element (whose value is "true" or " false

IS EMPTY is TRUE if the collection is empty and FALSE otherwise. c.languages IS NOT EMPTY is FALSE ... OF c.languages is TRUE if languages contains 'English' and FALSE if not. 'English' NOT MEMBER OF c ... for the languages  parameter  is a collection that contains 'English' and FALSE if not

with default values ( 0 , false or null ). Fields in the old schema that do not have matching fields in ... with a default value ( 0 , false or null ). The following type conversions are supported: From any numeric ... boolean ( 0 , null and false are converted to false , any other value is converted to true ). From

= NULL NULL = NULL NULL NULL NULL == FALSE TRUE != TRUE FALSE Comparison operators are always evaluated to TRUE , FALSE or NULL . When both operands are not NULL (not shown in the table) the operator is evaluated to either TRUE or FALSE , and in that case, == is equivalent to = and != is equivalent

(usually a parameter or literal). For example: c.name LIKE '_r%' is TRUE for 'Brazil' and FALSE for 'Denmark' c.name LIKE '%' is always TRUE (for any c.name value). c.name NOT LIKE '%' is always FALSE ... ;is evaluated to TRUE . '100' LIKE '%\%' ESCAPE '\' is evaluated to FALSE . In the expressions

{ @Basic ( optional = false ) Integer field1; @OneToOne ( cascade = CascadeType . ALL ) MyEntity field2 ... are allowed by default. Specifying optional= false (as demonstrated for field1 ) causes an exception

_TIMESTAMP,DELETE, DESC, DISTINCT, ELSE, EMPTY, END, ENTRY, ESCAPE, EXISTS, FALSE , FETCH,FROM, GROUP

" is specified (the default is false ). The optional name attribute has no specific role

explicitly. For example: @Cacheable ( false ) @Entity public class MyNonCacheableEntityClass extends

is "true" or " false " ) specifies if the user is a superuser. A superuser is authorized to manage

" false " ) specifies if SSL is used. As shown above, SSL is disabled by default. It could be enabled

() Create a disjunction (with zero disjuncts). A disjunction with zero disjuncts is false . Returns ... testing for a false value. Parameters: x - expression to be tested Returns: predicate. Since: Jakarta ... , the predicate will be false . Parameters: elem - element expression collection - expression Returns: is-member

(optional = false ) @JoinColumn(name = "CUSTREC_ID", unique = true, nullable = false , updatable = false ) public CustomerRecord getCustomerRecord() { return customerRecord; } // On CustomerRecord class: @OneToOne(optional = false , mappedBy = "customerRecord") public Customer getCustomer() { return

persistence context is an instance of the given entity class, or false otherwise. This method ... is to be determined entity - entity instance containing the attribute Returns: false if entity's state ... : false if entity's state has not been loaded or if the attribute state has not been loaded, else true

= false ) @JoinColumn(name = "CUST_ID", nullable = false , updatable = false ) public Customer ... optional (Optional) Whether the association is optional. If set to false then a non-null relationship

to the database. Throws: IllegalStateException - if isActive is false . RollbackException - if the commit ... whether the transaction has been marked for rollback. Throws: IllegalStateException - if isActive is false ... back the current resource transaction. Throws: IllegalStateException - if isActive is false . PersistenceException

if the first result is a result set, and false if it is an update count or there are no results ... can then be used to test for further results. If execute or hasMoreResults returns false ... result corresponds to a result set, and false if it is an update count or if there are no results

(name = "DESC", nullable = false , length = 512) public String getDescription() { return description ... = false , precision = 12, scale = 2) public BigDecimal getCost() { return cost; } Portable ... entailed by the primary key mapping and to constraints specified at the table level. Default: false

", nullable = false ) public Customer getCustomer() { return customer; } Example 2: One-to-Many association ... : @ManyToOne @JoinColumn(name = "CUST_ID", nullable = false ) public Customer getCustomer() { return customer ... . Default: false Since: Jakarta Persistence (JPA) 2.0 Additional JDK methods inherited from java.lang

whose load state is to be determined entity - entity containing the attribute Returns: false if entity's ... : false if the entity has not been loaded, else true. Since: Jakarta Persistence (JPA) 1.0

and to constraints specified at the table level. Default: false Since: Jakarta Persistence (JPA) 1.0 boolean nullable (Optional) Whether the database column is nullable. Default: false Since: Jakarta

. Default: false Since: Jakarta Persistence (JPA) 1.0 boolean nullable (Optional) Whether the foreign key column is nullable. Default: false Since: Jakarta Persistence (JPA) 1.0 boolean insertable

to a basic type , enabling a converter defined autoApply= false , overriding the use of a converter ... : false Since: Jakarta Persistence (JPA) 1.0 Additional JDK methods inherited from java.lang

annotation explicitly specifies a different converter . If autoApply = false , the converter applies ... type. Default: false Since: Jakarta Persistence (JPA) 1.0 Additional JDK methods inherited from java

, except for getProperties , getTransaction , and isOpen (which returns false ). If this method is called when the entity ... . Returns false if the entity manager is not joined to the current transaction or if no transaction

_SELECTIVE Caching is enabled for all entities except those for which Cacheable( false ) is specified. Entities for which Cacheable( false ) is specified are not cached. Since: Jakarta Persistence (JPA) 1.0 ENABLE

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.SharedCacheMode DISABLE_SELECTIVE Caching is enabled for all entities except those for which Cacheable( false ) is specified. Entities for which Cacheable( false ) is specified are not cached. Since: Jakarta Persistence (JPA) 1.0

(Optional) Whether the index is unique. Default: false Since: Jakarta Persistence (JPA) 1.0 String

key. Default: false Since: Jakarta Persistence (JPA) 1.0 boolean nullable (Optional

can still be fully specified by an attribute node referencing a subgraph. Default: false Since: Jakarta

, which will return false . Once an EntityManagerFactory has been closed, all its entity managers are considered

to be eliminated. A false value will cause duplicates to be retained. If distinct has not been specified

attribute. Returns true for a simple id or embedded id; returns false for an idclass. Returns

false for an idclass. Inherited from IdentifiableType Returns: boolean indicating

() Whether the identifiable type has a single id attribute. Returns true for a simple id or embedded id; returns false

results are eliminated. A true value will cause duplicates to be eliminated. A false value

query results are eliminated. A true value will cause duplicates to be eliminated. A false value

which is declared autoApply= false , to explicitly disable conversion , or to resolve ambiguities

Jakarta Persistence (JPA) Interface jakarta.persistence.Cache Interface used to interact with the second-level cache. If no second-level cache is in use, the methods of this interface have no effect, except for contains , which returns false . Since: Jakarta Persistence (JPA) 2.0 The Shared (L2

; it can be overridden by specifying Cacheable on a subclass. Cacheable( false ) means that the entity

whose load state is to be determined Returns: false if the entity has not been loaded, else true. Since: Jakarta Persistence (JPA) 1.0

Returns: false if entity's state has not been loaded or if the attribute state has not been loaded, else true. Since: Jakarta Persistence (JPA) 1.0

whose load state is to be determined entity - entity instance containing the attribute Returns: false

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.AbstractQuery AbstractQuery distinct (    boolean distinct ) Specify whether duplicate query results are eliminated. A true value will cause duplicates to be eliminated. A false value will cause duplicates to be retained