java hibernate query.list returns empty list

I am using hibernate with JPA annotations and Jboss transaction manager I build the session factory open up a session and create a query when i use query.li开发者_运维技巧st it always returns me an empty list

any idea?

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Few suggestions:

Enable configuration parameter show-sql in persistence.xml. Try this, i.e.

<property name="hibernate.show.sql" value="true" />

Furthermore, it is better to format that using,

<property name="hibernate.format_sql" value="true" />

And then try to run the same query in some SQL Client.

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If you are adding values in the database from the command prompt manually, perform the commit operation after insertion. especially in oracle DB