About variable


FROM clause (JPQL / Criteria API)

Explains how to use the FROM clause and JOIN expressions in a JPA/JPQL query.... over objects in the database. A query identification variable is similar to a variable of a Java enhanced for loop in a program, since both are used for ...


Criteria Query From Elements

Reference (JavaDoc) of JPA query criteria FROM clause interfaces, including From, Root, Join and Fetch.... Join variables (bound by an attribute of a preceding variable in the FROM clause) are represented by the Join subinterface ...


JPA JPQL WHERE clause for IN :variable not working if variable is a list of Enums

Hi, I have a case where I have a JPQL query like: "select o from MyEntity o WHERE (enumField IN :enumFieldList)" And enum field is defined in MyEntity as: @Enumerated(EnumType.STRING) @Column(nullable = false) @Index private MyEnumType enumField; And MyEnumType is defined as: public enum MyEnumType { VALUE1, VALUE2, VALUE3, VALUE4 } and I call: #1 2013-10-02 04:31 Hi, I have a case where I have a JPQL query like: "select o from MyEntity o WHERE (enumField IN : ...


WHERE clause (JPQL / Criteria API)

Explains how to use the WHERE clause in a JPQL query.... Predicate and Indexes WHERE Filter in Multi Variable Queries JPQL Expressions in WHERE WHERE in ... Country objects in the database using the c range variable. Before passing these Country objects to the SELECT clause for ...


Weird issue with variable naming

hi, ... hi, We've hit again against troubles with the variable naming when trying to get the query string with ... without ordering. The issue is that the name of the root variable is $1 as well as the name of our left join variable becomes $1. We're also adding a custom function expression in ...


OutOfMemoryError in a query with many variables

Just got this:   Bug Version: 2.3.7 Priority: Normal Status: Fixed Replies: 4 Type:  Bug ...


Paths and Types in JPQL and Criteria API

Explains how to use object expressions (path navigation, type) in JPA/JPQL.... with an instance of a user defined class (represented by a variable, parameter or prefix path expression) and uses the dot ( . ) ... a method via a null reference. In JPQL, the current FROM variable (or FROM tuple when there are multiple variables) is simply skipped. ...



The Query interface allows applications to obtain persistent instances, values, and aggregate data from the data store.(Interface of JDO)



Declare the unbound variables to be used in the query.(Method of javax.jdo.Query)


[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... be accessed. This includes fields of parameter objects and variable objects (parameters and variables are discussed later in this ... . Bound Variables A bound variable is an identifier that appears in the query filter as an argument of ... on the left side), before any other appearance of the variable in the query filter. The following query retrieves people with at ...