About expression

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JPA Doc
56

in(values)

Method javax.persistence.criteria.Expression Predicate in(   Expression values ) Create a predicate to test whether the expression is a member of the collection. Parameters: values - expression corresponding to collection to be tested against Returns: predicate testing for membership Since: JPA 2.0
JPA Doc
56

select(expression)

Method javax.persistence.criteria.Subquery Subquery select(   Expression expression ) Specify the item that is to be returned as the subquery result. Replaces the previously specified selection, if any. Parameters: expression - expression specifying the item that is to be returned as
JPA Doc
56

isNotNull()

Method javax.persistence.criteria.Expression Predicate isNotNull() Create a predicate to test whether the expression is not null. Returns: predicate testing whether the expression is not null Since: JPA 2.0
JPA Doc
56

isNull()

Method javax.persistence.criteria.Expression Predicate isNull() Create a predicate to test whether the expression is null. Returns: predicate testing whether the expression is null Since: JPA 2.0
JPA Doc
55

in(values)

Method javax.persistence.criteria.Expression Predicate in(   Object... values ) Create a predicate to test whether the expression is a member of the argument list. Parameters: values - values to be tested against Returns: predicate testing for membership Since: JPA 2.0
JPA Doc
55

in(values)

Method javax.persistence.criteria.Expression Predicate in(   Collection values ) Create a predicate to test whether the expression is a member of the collection. Parameters: values - collection of values to be tested against Returns: predicate testing for membership Since: JPA 2.0
Manual
50

Strings in JPQL and Criteria Queries

parameters - when string values are assigned as arguments. as path expressions - in navigation ... for a match (usually a path expression) and the right operand is always the pattern (usually a parameter or ... '%\%' ESCAPE '\' is evaluated to FALSE. In the expressions above only the first percent character
Manual
45

Paths and Types in JPQL and Criteria API

classes) are represented in JPQL by the following types of expressions: Variables - FROM ... as arguments. Path expressions that navigate from one object to another. Instances of user defined ... . But more often they are used in JPQL path expressions that navigate to values of simple types (number, boolean
Manual
42

ORDER BY clause (JPQL / Criteria API)

Expressions The following query returns names of countries whose population size ... . Then the SELECT clause builds the results by evaluating the result expressions. Finally the results are ordered by evaluation of the the ORDER BY expressions. Only expressions that are derived
Manual
40

SELECT clause (JPQL / Criteria API)

objects. JPA 2 adds the ability to use almost any valid JPQL expression in SELECT clauses ... - JPQL does not support the "SELECT *" expression (which is commonly used in SQL). Projection of Path Expressions JPQL queries can also return results which are not entity objects. For example