About execute

manual

Running JPA Queries

Explains how to use JPA to run Java Persistence Query Language (JPQL) queries.... getSingleResult() Query's method Execute a SELECT query that returns a single untyped result. See JavaDoc ... getResultList() Query's method Execute a SELECT query and return the query results as an untyped List. See ... getSingleResult() TypedQuery's method Execute a SELECT query that returns a single result. See JavaDoc Reference ...

 
api-jpa

javax.persistence.TypedQuery

Interface used to control the execution of typed queries.(Interface of JPA)

 
api-jdo

execute()

Execute the query and return the filtered Collection.(Method of javax.jdo.Query)

 
api-jpa

javax.persistence.Query

Interface used to control query execution.(Interface of JPA)

 
manual

Setting and Tuning of JPA Queries

Explains various JPA query settings - result range, flush and lock.... getResultList() TypedQuery's method Execute a SELECT query and return the query results as a typed List. See ... getSingleResult() TypedQuery's method Execute a SELECT query that returns a single result. See JavaDoc Reference ...

 
manual

CRUD Database Operations with JPA

Shows how to use Java/JPA to store, retrieve, update & delete.... getSingleResult() Query's method Execute a SELECT query that returns a single untyped result. See JavaDoc ... getSingleResult() Query's method Execute a SELECT query that returns a single untyped result. See JavaDoc ... getSingleResult() Query's method Execute a SELECT query that returns a single untyped result. See JavaDoc ...

 
forum_thread

Attempt to execute a query using a closed EntityManager

Hi again! Suddenly, my app started to throw this exception. I would really appreciate some advices. ... advices. com.objectdb.o.UserException - Attempt to execute a query using a closed EntityManager at ... objectdb . o ._PersistenceException : Attempt to execute a query using a closed EntityManager at org. apache . ... . myfaces . lifecycle . InvokeApplicationExecutor . execute ( InvokeApplicationExecutor. java : 38 ) at ...

 
api-jpa

getResultList()

Execute a SELECT query and return the query results as a typed List.(Method of javax.persistence.TypedQuery)

 
api-jdo

javax.jdo.Query

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

 
forum_thread

Querys slower when execute a query after every persist

The test case of the java file attachment persists many entities and executes a query after every persist. The execution time amounts 2 sec when the test persists 1000 entities. The execution time amounts 100 sec when the test persists 10000 entities. We have been expected that the second case requires only 20 sec, but the test requires 100 sec. Why the querys will be more and more slower? In addition there are a cpu snapshot for visual vm and an image of cpu snapshot as attachment. #1 2015-09-18 10:43 The test case of the java file attachment persists many entities and executes a query after every persist. ...