About logical
Logical Operators in JPQL and Criteria API
Explains how to use AND, OR and NOT in JPQL queries. Logical operators in JPQL and in JPA criteria queries enable composition of ... This page covers the following topics: Logical Operators Binary AND (&&) Operator ... Unary NOT (!) Operator Criteria Query Logical Operators Logical Operators ObjectDB ...
JPA Query Expressions (JPQL / Criteria)
Describes JPA query (JPQL / Criteria API) expressions (literals, operators and functions).... and the [NOT] LIKE operator. Logical operators : AND, OR, NOT. In addition, JPA queries ... Comparison in JPQL and Criteria API Logical Operators in JPQL and Criteria API Detailed explanations ...
WHERE clause (JPQL / Criteria API)
Explains how to use the WHERE clause in a JPQL query.... operators (arithmetic operators, relational operators, logical operators) and functions (numeric functions, string functions, ... ) ) ; See the Logical Operators page for explanations on boolean expressions and ...
JPA Criteria API Queries
Explains how to use the JPA Criteria API (CriteriaBuilder, CriteriaQuery, etc.) to build JPQL like queries.... JavaDoc Reference Page... , ...) Logical expressions ( and and(x, y) CriteriaBuilder's method ...
Comparison in JPQL and Criteria API
Explains how comparison operators can be used in JPQL queries, including in comparing null values. Most JPQL queries use at least one comparison operator in their WHERE clause. This page covers the following topics: Comparison Operators Comparing NULL values IS [NOT] NULL Comp ...
@Entity saved in Tomcat session - problem
Hi, I have found a problem, when storing @Entity object in Tomcat session. When starting or stopping Tomcat, I get nasty exception - please check attached log. Strange thing is, that after this exception everything works perfectly fine. The problem appears after using Enhancer. The nasty solution is to create copy of @Entity class as normal POJO and use it to store in session. The problem is, that we need the same logic for temporary users (without storing in DB) and permanent users (stored in database). A separate POJO makes the whole logic quite complicated. #1 2010-12-13 14:42 Hi, I have found a problem, when storing @Entity object in Tomcat session. When starting or stopping ...
Join query problem with new statetment
Hi, I'm trying to implement some reporting logic in my application and got nasty exception when using query with join. The query code is: #1 2011-07-04 19:40 Hi, I'm trying to implement some reporting logic in my application and got nasty exception when using ...
javax.jdo.listener.DeleteCallback
This interface is used to notify instances of delete events.(Interface of JDO)
Attempt to refresh a non managed entity object (error 635)
Just ran into a problem that I've not seen in 10 years of running ObjectDb: java.lang.IllegalArgumentException Attempt to refresh a non managed entity object (error 635) Nothing changed in my code, but I'm wondering if there is a problem with the config file, and /or my recent experiments with Intellij's JPA database explorer, which required me to use a JPA persistence.xml configuration file. (I was able to use to run objectdb queries from inside Intellij). #1 2012-05-17 18:03 Just ran into a problem that I've not seen in 10 years of running ObjectDb: java.lang.IllegalArgumentEx ...
