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Manual
9

GROUP BY and HAVING clauses

clause. When a GROUP BY clause exists in a JPQL query, database objects (or tuples of database objects ... (count, sum, avg, max, min) that are carried out on all the objects (or the object tuples) in the group ... which all the FROM/WHERE objects (or object tuples) are considered as one group. For example
Manual
9

Paths and Types in JPQL and Criteria API

with an instance of a user defined class (represented by a variable, parameter or prefix path expression ... must contain a persistent field (or property) with a matching name. The path expression ... , a NullPointerException is thrown on any attempt to access a field or a method via a null reference. In
Manual
9

Retrieving JPA Entity Objects

with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object ... FetchType.LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not distinguish ... @OneToMany or @ManyToMany annotations (currently ObjectDB does not distinguish between the two) enables
Result
9

Posting to ObjectDB Website - Important Instructions [2018-08-06]

ticket or as an issue. The exceptions are: Clear ObjectDB bugs, such as unexpected exception thrown ... to modify, delete or move any post at its sole discretion. 2. Content and Readability To keep your post ... To demonstrate a technical question or an issue - you may have to provide a complete runnable sample
Manual
9

Storing JPA Entity Objects

or implicitly as a result of a cascade operation. Explicit Persist The following code stores ... managed by the EntityManager) or by commit. Referenced Embedded Objects The following code stores ... of every reachable object or alternatively by setting automatic cascading persist. Cascading Persist Marking
Manual
8

Setting and Tuning of JPA Queries

execution if invoked before a query is run using getResultList or getSingleResult. Result Range ... or at the level of a specific query, by overriding the default EntityManager setting: // Enable ... " (JDO query language) or "ODBQL" (ObjectDB query language). The default is ODBQL, which is a union
Manual
8

JPA / JDO Class Enhancer

of a class (without .class suffix) in the CLASSPATH - path to class or jar file(s ... for enhanced classes You can specify class files and jar files for enhancement explicitly or by ... can also be passed to the enhance method as a single string delimited by commas or spaces. In
Manual
8

Strings in JPQL and Criteria Queries

characters: The percent character (%) - which matches zero or more of any character. The underscore ... for a match (usually a path expression) and the right operand is always the pattern (usually a parameter or ... ). To match an actual underscore or percent character it has to be preceded by an escape character
Manual
8

Query Parameters in JPA [2011-04-01]

of :name itself is String. Queries can include multiple parameters and each parameter can have one or ... (as other query elements) are represented by objects (of type ParameterExpression or its super interface Parameter) rather than by names or numbers. See the Parameters in Criteria Queries section
Manual
8

Query Parameters in JPA

of :name itself is String. Queries can include multiple parameters and each parameter can have one or ... (as other query elements) are represented by objects (of type ParameterExpression or its super interface Parameter) rather than by names or numbers. See the Parameters in Criteria Queries section