如何在 Netbeans里面测试 JPQL query

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Test JPQL with NetBeans IDE 7.3 Tools

By Geertjan-Oracle on Oct 06, 2012

Since I pretty much messed up this part of the "Unlocking Java EE 6 Platform" demo, which I did together with PrimeFaces lead Çağatay Çivici during JavaOne 2012, I feel obliged to blog about it to clarify what should have happened! In my own defense, I only learned about this feature 15 minutes before the session started. In 7.3 Beta, it works for Java SE projects, while for Maven-based web projects, you need a post 7.3 Beta build, which is what I set up for my demo right before it started. Then I saw that the feature was there, without actually trying it out, which resulted in that part of the demo being a bit messy. And thanks to whoever it was in the audience who shouted out how to use it correctly!

Screenshots below show everything related to this new feature, available from 7.3 onwards, which means you can try out your JPQL queries right within the IDE, without deploying the application (you only need to build it since the queries are run on the compiled classes):

SQL view:

Result view for the above:

Here, you see the result of a more specific query, i.e., check that a record with a specific name value is present in the database:

Also note that there is code completion within the editor part of the dialog above. I.e., as you press Ctrl-Space, you'll see context-sensitive suggestions for filling out the query. All this is pretty cool stuff! Saves time because now there's no need to deploy the app to check the database connection.

Category: NetBeans IDE

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Comments:

the option to start the JPQL editor remains grayed out when right-clicking on persistence.xml, despite building (or running) a maven project on GlassFish 3.1.2.2 Are there any special requirements to its structure? I set all additional eclipselink properties (seehttp://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Basic_JPA_Development/Configuration/JPA/persistence.xml)in persistence.xml (which I don't need because it references a jndi datasource)

Posted by guest on October 09, 2012 at 10:16 AM PDT #

7.3 Beta does not yet have support for this, you need a post 7.3 Beta build.

Posted by Geertjan on October 09, 2012 at 11:05 AM PDT #

trying to use Oracle INTERVAL with JPQL and cannot seem to get it right..Could you please post an example - both SQL and JPQL - using INTERVAL in the query.
much appreciated

Posted by Jerry on October 10, 2012 at 06:54 AM PDT #

Is the Run JPQL only available for Java SE projects?

I am unable to run a JPQL query. The editor finds my entities, because the code completion is working (entity names).

When I attempt a query, I keep getting this error:
"java.lang.Exception: You need to register database connection on Services tab"

My database connection is setup under Services > Databases.

Thanks

Posted by Richard on January 08, 2013 at 07:37 AM PST #

i have the same error too

"java.lang.Exception: You need to register database connection on Services tab"

Posted by guest on February 13, 2013 at 02:14 AM PST #

Me too, it would be nice if there is some explanation what netbeans needs if it gives the error "You need to register database connection on Services tab"

Posted by guest on February 18, 2013 at 02:28 AM PST #

Go to the Services window and register a database connection there.

Posted by Geertjan on February 18, 2013 at 04:36 AM PST #

Hi Geertjan,

same here: "You need to register database connection on Services tab", but I have an (open) JDBC connection registered in the services tab... Do I need to specify JDBC parameters in the persistence.xml?

I think it would be great if the connection could be chosen as it can be done in the SQL query window.

Posted by Karl Peterbauer on February 27, 2013 at 12:34 AM PST #

Same error:
"You need to register database connection on Services tab".

Connection registered correctly, an sql query within netbeans works fine.
Autocomplete works correctly.

***Please help...!***

Posted by guest on February 27, 2013 at 12:40 AM PST #

Have you started the database? Please send your questions on this point to the mailing list, nbusers@netbeans.org

Posted by Geertjan on February 27, 2013 at 12:53 AM PST #

In general you may no need in start a connection for jpql features to work properly if it's registered properly on services tab. Connection should be started automatically in this case(at least derby and mysql if mysql server is registered and start path is specified), for other servers you may need to have it started first if nb can't start it from Services also.

It's not so good to allow manual url selection as model should match tables and match specific persistence.xml, there will be more issues with selection of wrong connection in my opinion.

Connection on Services tab should match one used in persistence.xml with all parameters match, please check if you have extra parameters (see for example if you have "zeroDateTimeBehavior=convertToNull" for mysql connections in one place only). If you are using datasources in jee environment, you may need to check connection url in your datasource configuration to see if it match with url for connection registered one on Services.

Persistence do not try to look for "similar" urls even it's possible to implement. Some parameters may affect mappings and it may cause different hard to find errors by model-db mismatch. You need exact match for urls.

Posted by serge on February 27, 2013 at 04:27 AM PST #

What is missing is the JDBC driver (ojdc6.jar, mysql.jar) in the project's libriries and clean and build the project. After that the JPQL Editor works fine!

Posted by German Suárez on March 01, 2013 at 12:20 PM PST #

Doesn't work for postgresql !

Posted by guest on March 05, 2013 at 01:17 PM PST #

Thanks. Let me try to reproduce your problem. Hmmm... ummm... no steps. Oh well.

Posted by Geertjan on March 05, 2013 at 01:32 PM PST #

java.lang.Exception: You need to register database connection on Services tab

Drivers exist, native queries work fine.

Posted by guest on March 07, 2013 at 01:55 AM PST #

Please, instead of adding comments here, add your comments about the "You need to register database connection on Services tab" message here: http://netbeans.org/bugzilla/show_bug.cgi?id=227149

Posted by Geertjan on March 07, 2013 at 02:18 AM PST #

Hello Geertjan Wielenga, I have one problem when I run the JPQL in NetBeans 7.3 it shows the following error.
----------------------------------------------
javax.persistence.PersistenceException: [PersistenceUnit: WebApplication1PU2] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:915)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:890)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
Caused by: org.hibernate.service.jndi.JndiException: Error parsing JNDI name [hi]
at org.hibernate.service.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:92)
at org.hibernate.service.jndi.internal.JndiServiceImpl.locate(JndiServiceImpl.java:63)
at org.hibernate.service.jdbc.connections.internal.DatasourceConnectionProviderImpl.configure(DatasourceConnectionProviderImpl.java:116)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:73)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2279)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2275)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1744)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:905)
... 5 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:325)
at javax.naming.InitialContext.getNameParser(InitialContext.java:480)
at org.hibernate.service.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:86)
... 21 more

----------------------------------------------
Any help would be greatly appreciated

Posted by guest on May 06, 2013 at 11:03 PM PDT #

Just go to Google and look for "Caused by: org.hibernate.service.jndi.JndiException: Error parsing JNDI name".

And please don't put long stack traces in my blog again, just usse Google or go to the NetBeans mailing list.

Posted by Geertjan on May 07, 2013 at 01:44 AM PDT #

Hi Geertjan, I have a problem. When I try to run the query, I get the message "java.lang.Exception: You project either have no sources or you need to rebuild your project"

I have rebuilt my project several times but still get this exception. What is the problem?. Thanks

Posted by Carlos Delgadillo on May 07, 2013 at 11:54 AM PDT #

Regarding last one issue, it may be https://netbeans.org/bugzilla/show_bug.cgi?id=225911 resolved in next 7.3 patch/7.3.1, it should be released quite soon.

Also 7.3.1 will contain more smart hint regarding connection misconfiguration.

It's nice if everybody with any jpql related issue will file issues herehttps://netbeans.org/bugzilla/enter_bug.cgi?product=javaee also (Persistence component). it will help to track if issue is resolved, ask for more details etc.

Posted by guest on May 08, 2013 at 02:21 AM PDT #

Hi,
Spring 3.1 doesn't require the persistence.xml file anymore, and the persistence unit configuration can be done directly in the Java classes or the Spring context file. Is there a way to run the JPQL editor based on the Spring configuration/context file/whatever but without the dedicated persistence.xml? We have such a project and it would be nice to be able to use the JPQL editor features.

Posted by guest on May 29, 2013 at 04:39 AM PDT #

Hay que hacer algo especial para que funcione JPQL Query en Netbeans 7.3. Utilizo MySql y no he podido hacer que funcione. Alexie

Posted by guest on September 06, 2013 at 11:55 AM PDT #

Exception:
javax.persistence.PersistenceException: No Persistence provider for EntityManager named test
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:85)

with persistence:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/persistencehttp://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="test" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com...</class>
<properties>
<property name="hibernate.default_schema" value="something"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect"/>
<property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:@DB:1521:XE"/>
<property name="javax.persistence.jdbc.user" value="testuser"/>
<property name="javax.persistence.jdbc.password" value="markant1"/>
<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
</properties>
</persistence-unit>
</persistence>

Posted by guest on October 23, 2013 at 03:31 AM PDT #

About

Geertjan Wielenga (@geertjanw) is a Principal Product Manager in the Oracle Developer Tools group living & working in Amsterdam. He is a Java technology enthusiast, evangelist, trainer, speaker, and writer. He blogs here daily.

The focus of this blog is mostly onNetBeans (a development tool primarily for Java programmers), with an occasional reference to NetBeans, and sometimes diverging to topics relating to NetBeans. And then there are days when NetBeans is mentioned, just for a change.

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如何在 Netbeans里面测试 JPQL query

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