About string

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Manual
7

GROUP BY and HAVING clauses

of comparable values (numeric, strings, dates). MAX - returns the maximum of comparable values (numeric, strings, dates). The following query counts for every letter the number of countries ... contains the initial letter as a String object, the second cell contains the number of countries in
Manual
7

JPA Query API

Building queries by passing JPQL query strings directly to the createQuery method, as shown above, is referred to in JPA as dynamic query construction because the query string can be built dynamically ... on Java objects that represent query elements (replacing string based JPQL). JPA also provides a way
Manual
7

Locking in JPA

> For an EntityManagerFactory - using the createEntityManagerFacotory method:   Map<String,Object ...  - using the createEntityManager method:   Map<String,Object> properties = new HashMap ... : Map<String,Object> properties = new HashMap();   properties.put("javax.persistence.lock.timeout
Manual
7

Online Backup

.createQuery("objectdb backup").getSingleResult(); The backup query string is always exactly "objectdb backup ... could be specified as a String value: Query backupQuery = em.createQuery("objectdb backup"); backupQuery.setParameter("target", "backup"); backupQuery.getSingleResult(); When a string is specified as
Manual
7

Defining a JPA Entity Class

getX() { return this.x; } public int getY() { return this.y; } // String Representation: @Override public String toString() { return String.format("(%d, %d)", this.x
Result
7

ObjectDB Object Database Features

, Byte, Short, Character, Integer, Long, Float, Double). java.lang.String Date types: java.util.Date ... and Double). java.lang.String Dates: java.util.Date, java.sql.Date, java.sql.Time and java.sql.Timestamp ... , &&, ||). Arithmetic operators & functions (+, -, *, /, %, ABS, SQRT, MOD). JPQL string operators & functions
JDO Doc
6

javax.jdo.JDOException

without a detail message. Constructs a new JDOException without a detail message. Since: JDO 1.0 JDOException(String msg ... (String msg, Object failed) Constructs a new JDOException with the specified detail message and failed ... : msg - the detail message. failed - the failed object. Since: JDO 1.0 JDOException(String msg
JPA Doc
6

javax.persistence.EntityManager

- if not an entity Since: JPA 1.0 Query createNamedQuery(String name) Create an instance of Query ... string is found to be invalid Since: JPA 1.0 TypedQuery createNamedQuery(String name, Classstring is found to be invalid
JDO Doc
6

javax.jdo.annotations.Persistent

" and "property". Since: JDO 2.1 String cacheable Whether this field/property is cacheable in a Level2 cache ... String column Column name where the values are stored for this member. Column name where the values ... . Returns: the columns for this member Default value: {} Since: JDO 2.1 String customValueStrategy Custom
JPA Doc
6

javax.persistence.metamodel.EntityType

Attribute getAttribute(String name) Return the attribute of the managed type that corresponds ... . Returns: bindable type Since: JPA 2.0 CollectionAttribute getCollection(String name) Return ... Since: JPA 2.0 CollectionAttribute getCollection(String name, Class elementType) Return