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Logical Operators in JPQL and Criteria API

Logical operators in JPQL and in JPA criteria queries enable composition of complex ... > Logical Operators ObjectDB supports 2 sets of logical operators, as shown in ... support. Criteria Query Logical Operators Boolean Expressions and Predicates

JPA Query Expressions (JPQL / Criteria)

/logical">Logical operators: AND, OR, NOT. In addition, JPA queries support ... >isNull, ...) logical#criteria_query_logical_operators">Logical expressions (and, or, not, isTrue).

Comparison in JPQL and Criteria API

> and != implement the ordinary Java logic, in which, for example, null == null is true. All the other operators implement the SQL logic in which NULLlogic of Java's equals, comparing the content rather than the identity.

WHERE clause (JPQL / Criteria API)

(arithmetic operators, relational operators, logical operators) and functions (numeric functions, string ... >See the logical#criteria_query_logical_operators">Logical Operators page 

Logical "or" works not correcly when field is @Id and first position

The following code doesn't respect the logical "or" correctly. Instead of returns all 2 datasets it returns only this one, which matches the first predicate in the or. BUT: this happens only, if the field for the "or" is the first one defined as @Id.

JPA Criteria API Queries

/logical#criteria_query_logical_operators">Logical expressions (

ObjectDB Object Database Features

> logical">Logical operators (AND, OR, NOT, &

JPA Persistence Unit

A JPA Persistence Unit is a logical grouping of user defined persistable classes (entity classes, embeddable classes and mapped superclasses) with related settings. Defining a persistence unit is optional when using ObjectDB, but required by JPA.

[ODB1] Chapter 7 - JDOQL Queries

>). Logical Operators Logical operators (&&

javax.jdo.InstanceCallbacks

can be used in the business logic of the method.