382 | Logical operators in JPQL and in JPA criteria queries enable composition of complex JPQL boolean expressions out of simple JPQL boolean expressions. Logical Operators ObjectDB supports 2 sets of logical operators, as shown in the following table: Set 1 - JPQL / SQL Set 2 - Java / JDO AND && OR |
44 | to <>. When at least one of the two operands is NULL, == and != implement the ordinary Java logic, in which, for example, null == null is true. All the other operators implement the SQL logic in which NULL represents an unknown value ... follow the logic of Java's equals, comparing the content rather than the identity. Date values |
36 | 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. public class OrTest { @Entity static |
28 | ] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries ... , isMember, isNotMember, size). Comparison expressions (equal, notEqual, gt, ge, lt, le, between, isNull, ...) Logical expressions (and, or, not, isTrue). |
28 | , which includes many operators (arithmetic operators, relational operators, logical operators ... ), cb.lt(c.get("area"), a) ) ); See the Logical Operators page for explanations on boolean |
19 | . Comparison operators (<, <=, >=, <>, =, !=, ==, BETWEEN, IS NULL). Logical operators (AND, OR, NOT |
19 | expressions (equal, notEqual, gt, ge, lt, le, between, isNull, ...) Logical expressions (and, or, not |
19 | 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. persistence.xml Persistence units are defined in |
2 | , double). Logical Operators Logical operators (&&, ||, !) generate complex boolean expressions |
0 | the enhancer so that fields referenced can be used in the business logic of the method. Since: JDO 2.0 void |