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Query performance in general

Hi ObjectDB team, we are currently investigating performance issues that affect some ... and date where id is indexed and date is not. Would it make sense to have "WHERE $1.id > ... AND $1.date >= ..." instead of "WHERE $.date >= ... AND $1.id > ..."? We saw that there is a special statement

ObjectDB and Spring Boot - sharing a simple working example

> {     List<Person> findAllByBirthDateBetween(Date d1, Date d2);     List<Person> findAllByGender(Person.Gender g);     List<Person> findAllByBirthDateBetweenAndGender(Date d1, Date d2, Person ... -data/jpa/docs/current/reference/html/#jpa.query-methods.query-creation     @Query("Select p from

virtual servers and one file

of this? Our only current workaround is to swap out older Entities entirely, but of course ... . ObjectDB 2.x does use RandomAccessFile. ObjectDB 3.0, which is currently under development switched ... areas. Maybe depending on the creation date? best regards Arne Arne Arne Stocker Thank

How to Use a SF with extended Persistence Context?

. if it finds one it updater his date to the current date. if not, it stores a new one using ... it show each name only once with his last login date. The changes are as follows: The GuestDao is a SF ... .as.security] (MSC service thread 1-9) JBAS013100: Current PicketBox version=4.0.7.Final 13:52:02,095

significant performance decrease

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> <general> <temp ... ; public Date associatedFileLastModification; @Index public String classIdentifier; public Date

What role is the JDO in ObjectDB?

ObjectDB is currently the most extended and up to date among all the JDO implementations except the JDO ... Mike Keith believe the JDO is out of date. Then what role of JDO in ObjectDB? Will our codes with JDO be out of date? Due in part to some of the failures of the EJB persistence model, and some

Possible issue with timestamps

.creationDate < :endDate and pass the dates in as parameters it works correctly. I have attached ... = 1L;                private Date creationDate = null;         private String firstname = null ... ;             this.creationDate = new Date();         }                 public CDI(String firstname, String lastname

em.flush(); em.clear(); loosing data and not persisting managed objects

- A Date object (I'm using its .toString() representation. This is the timestamp of when the Note ... /> <navigations> <addDate member="addDate" memberType="java.util.Date" id ... ="0" ext="1"> <member exp="$1.addDate" type="java.util.Date" var="1" directVar

ObjectDB 2 JDO Manual

two manuals up to date is a lot of work, but I would suggest that you a least make the Quick Start ... support from the product. If we can believe what we are told, db4o has hundreds of thousands of current ... would not be of interest to most people currently using Object databases. AlphaOne Ron Brennan

com.objectdb.o.InternalException: java.lang.ArrayIndexOutOfBoundsException: null

.TemporalType.TIMESTAMP) private Date createdTime; @Temporal(javax.persistence.TemporalType.TIMESTAMP) private Date modifiedTime; private @Index @Temporal(javax.persistence.TemporalType.TIMESTAMP) Date ... .TIMESTAMP) private Date refreshedTime; @Temporal(javax.persistence.TemporalType.TIMESTAMP) private

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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