About match


[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... in ObjectDB (and will be supported by JDO 2.0) is the match( ... ) method. It provides string comparison using regular ...


Modifying something with Explorer -> app JPQL with Enum doesn't work anymore

Hi! Scenario: Copy attached DB into localhost ObjectDB server (I'm running 2.5.1_03). Open attached project JavaEE Maven with NetBeans (7.4 beta in my case). Start ObjectDB on localhost as server. Run project on Apache Tomee 1.5.2 standard. Take a look at NetBeans' output to see how many entities are found with field type GOOD. There are 2 ways generate the bug: ... because of me that db file and enum class order don't match. The only ones that touched them are ObjectDB and Explorer, so maybe ...



PersistenceManager is the primary interface for JDO-aware application components.(Interface of JDO)


New to Product & Having An Issue

Greetings ObjectDB Users! I'm new to the product, and I've setup a simple test after reading the tutorial, and I'm running into some issues with queries, specifically querying by primary key.   I have a domain object class Called Department, which has a member of type DomainId.  DomainId has two member fields:  String accountId and String objectId.  The following code shows these two classes. #1 2010-12-16 19:42 Greetings ObjectDB Users! I'm new to the product, and I've setup a simple test after reading the ...



The Throwable class is the superclass of all errors and exceptions in the Java language.(Class of java.langClass Throwable)


Mapped By Fetch is very Slow

Well ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah again :( ). Here is the test case : 1- Create 100 000 entities with for each 1 entity with @OneToOne(mappedBy attribute) 2- Retrieve only 10 000 for testing 3- Wait ... On my AMD FX 8350, it took 60s Now, go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. ... may be relevant to other users and if they do not match the title of the forum thread it is virtually impossible to reach them by ...


Index Definition

Describes how to define indexes in JPA entity classes and explains how indexes are used in JPQL queries. Querying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes the iteration can be avoided and complex queries ov ...


query on calendar class

Hello!   I'm looking for help to build query on calendar class. I need to get objects where Calendar.DAY_OF_WEEK is FRIDAY or any other. My class: @Entity public class Cdr {     private static final long serialVersionUID = 1L;        @Id @GeneratedValue     private long serialID;     private String A;     @Temporal(TemporalType.TIMESTAMP) private Calendar start; I tested: ... In comparison the operand types must match. Not all the date/time types support the same ...


significant performance decrease

we are using objected in embedded mode (on OS X and WINDOWS). The database increased now to around 400000 entities of one class (database file size around 1.5 GByte). The response time of standard queries increased with this database size to an unacceptable rate (several seconds compared to around 30% when the number of entities was just half of the current). We tried to optimize the cache settings, current objectdb.conf is: <!-- ObjectDB Configuration --> <objectdb> ... executing a query at all) if: There is match of the query string + all the parameter values against the query result ...


ODB IndexActivation NullPointerException

Hi, We have created indexes on an existing database, which has 4.3 million objects. As soon we create first query, NullPointerException is thrown: ... Apparently the line numbers in this stack trace do not match build 2.7.1_01 completely. Please check the stack trace in ...