ObjectDB Database Search

:area Valid operands for the AND operator are TRUE , FALSE , or 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 an unknown value. Therefore, if one operand

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

" false " ) specifies whether a recovery file is used. The sync attribute ( "true" or " false ... sync= " false " results in much faster database writes, but sync="true" is safer for production ... " or " false " ) specifies whether recording is used. The sync attribute ( "true" or " false " ) specifies

.languages IS EMPTY evaluates to TRUE if the collection is empty and FALSE otherwise. c.languages IS NOT EMPTY evaluates to TRUE if the collection is not empty and FALSE otherwise. SIZE The SIZE ... 'English' , and FALSE otherwise. 'English' NOT MEMBER OF c.languages evaluates to TRUE

, including NULL , boolean literals ( TRUE and FALSE ), numeric literals (for example, 100 ), string ... supports two boolean literals: TRUE and FALSE . Because JPQL is case-insensitive, TRUE is equivalent to true and True , and FALSE is equivalent to false and False . Numeric literals JPQL supports

settings: The agent attribute (with a value of "true" or " false " ) specifies whether to load ... . The element The hollow attribute of the element (with a value of "true" or " false " ) specifies ... (with a value of "true" or " false " ) specifies whether to use serialization as a fallback persistence

( 0 , false , or null ). Fields in the old schema that do not have matching fields in the new schema ... , and the new field is initialized with a default value ( 0 , false , or null ). The following type ... values (the default). From any type to Boolean or boolean . ( 0 , null , and false are converted

One NULL operand Two NULL operands = NULL NULL = NULL NULL NULL NULL == FALSE TRUE != TRUE FALSE Comparison operators always evaluate to TRUE , FALSE , or NULL . When neither operand is NULL (a case not shown in the table), the operator evaluates to either TRUE or FALSE . In this case, == is equivalent

: 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 (for any c.name value). To match a literal ... '%\%' ESCAPE '\' is evaluated to FALSE . In the preceding expressions, the first percent sign

EntityWithFieldSettings { @Basic ( optional = false ) Integer field1; @OneToOne ( cascade = CascadeType ... . By default, null values are allowed. Specifying optional= false , as shown for field1 , throws

, CURRENT_TIME, CURRENT_TIMESTAMP,DELETE, DESC, DISTINCT, ELSE, EMPTY, END, ENTRY, ESCAPE, EXISTS, FALSE

or a unique index if you specify unique="true" . The default value for unique is false

classes except those explicitly marked as not cacheable . For example: @Cacheable ( false ) @Entity

caching: Specifies whether the entity is eligible for the second-level cache. Set to true or false

- 192.18.194.255 and from 127.0.0.1 . The admin attribute, with a value of true or false , specifies

The configuration element specifies Secure Sockets Layer (SSL) settings for secure client-server communication. The default configuration file contains the following element: The enabled attribute of the ssl element, which can be set to true or false , specifies whether SSL is used. As shown in

() 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