About database

121-130 of 200Refresh
Tutorial
10

Step 3: Define an EJB Session Bean

Operations on the database will be performed by an instance of a session bean (EJB) class ... ; @Stateless public class GuestDao { // Injected database connection ... the database. getAllGuests - for retrieving all the existing Guest objects from the database. EJB classes
FAQ
10

What is the Java Data Objects (JDO)?

The Java Data Objects (JDO) is another standard for accessing persistent data in databases, using ... ), which is designated to be used with relational databases, JDO is designated to be used with both relational and object databases. JDO is supported by many object databases, including ObjectDB
Forum
10

@SequenceGenerator and single id in whole database

strategy is Auto, which causes global ID's per database, not per class?   Yes, that is correct
Forum
10

Benchmark native JPA of Versant database (without datanucleous)

Now Versant DB (db4o commercial) has JPA implementation    Can you benchmark this Object Oriented DB to compare with Object DB? Since the Versant Object Database (unlike db4o) is not open source it would be impossible to include it in the JPAB benchmark results without the consent of Versant
Forum
10

Cache configuration of database file pages, query programs, query results

Are there some possibilities to configure following caches in order to keep cache data for only some important entity types and for the entire life cycle of the EntityManagerFactory. Cache of database file pages. Cache of query programs. Cache of query execution results. These caches are fully
Issue
10

config file for embedded database

Hi, I'm going back to embedded mode after some time with client/server mode. Question: how does the embedded jar find it's config file? Dave ps: thanks for the improvements to the explorer - still need a way to view (view only) an open embedded database.   Please read and follow the posting
Forum
10

config file for embedded database

Hi, I'm going back to embedded mode after some time with client/server mode. Question: how does the embedded jar find it's config file? Dave ps: thanks for the improvements to the explorer - still need a way to view (view only) an open embedded database. The same procedure is used for getting
Forum
10

Database is locked when in use

for us :-( Do you have any settings or other way to handle this? Using copy & paste to clone a database when it is in
Forum
10

database optimization

Hi, couple of questions regarding database optimization: 1) Noticed something odd with the level 2 cache configuration:    level2="0mb" -> 20 msec query    level2="2mb" -> 10 msec    level2="10mb" -> 40 msec Question: why is a larger level2 cache worse than no level2 cache, ie 10mb worse than 0mb
Forum
10

Does JPA have any configuration to create DDL's that are database specific

that are database specific.   Maybe what you are looking for is the Table annotation. But this is relevant