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How to check if an entity exists in a Database without loading it?

Hi, I am trying to speed up some code - where i check if an entity exists in order to make a decision. In Java - It looks like this (pk - is the primary key of the entity): MyClass find = em.find(MyClass.class, pk); boolean exists = find != null; Is there a way to check the existence

How to check if the classes were enhanced correctly with valid OEM license?

Hello, is there a way/tool how to check whether build classes were enhanced with valid OEM license? Scenario: 1) Build and enhance Java application with some Object DB license key. 2) Pick particular ... , etc.) Thank you. Maruta M Sedlakova To check if class MyEntity is enhanced using the OEM Enhancer use

How to check that ObjectDb licenses are activated?

Hi Support, I have added license keys to objectDb.conf file and according to https://www.objectdb.com/forum/1384 I tried to check the activation status using following code EntityManagerFactory emf ... .4 it's always returns FALSE. Please provide information how to programmatically could be checked

How to check what is taking most space in DB file

How to check what is taking most space in DB file

Collections in JPQL and Criteria Queries

] EMPTY operator checks whether a specified collection is empty or not. For example: c.languages ... of languages in that collection. [NOT] MEMBER [OF] The [NOT] MEMBER OF operator checks if a specified element ... method for checking if a specified element is contained in a collection. JPA distinguishes between

Database Explorer

of elements. Use the [First] and [Max] fields to set the result range. Check [Disable Cache] to bypass ... , for checking which indexes are used. The Reset button clears the content of all the fields. Refreshing ... used database at startup] check box specifies whether or not to open the last opened database

Database Management Settings

="." mode="write" /> <locking version-check="true" /> <processing cache="64mb" max-threads="10 ... <locking version-check="true" /> The version-check attribute of the <locking> element specifies ... in the entity class or not. It can be disabled by setting the version-check attribute to false

Retrieving JPA Entity Objects

for checking if a specified entity object or a specified persistent field is loaded. For example ... methods - one for checking an entity object and the other for checking a persistent field

[ODB1] Chapter 9 - ObjectDB Explorer

. The "General" group of check boxes contains the following options: Whether or not to open the last ... the Extent of a class. The "Display" group of check boxes contains the following options: Default ... server using SSL. The settings in this page are used only when the "Use SSL" check box in the "Open

[ODB1] Chapter 8 - ObjectDB Server

are checked. A valid configuration file is expected to be located on one of these paths. This section ... . The reload attribute specifies how often (in seconds) the server checks the configuration file for changes. For instance, a value of 30 (as specified above) indicates a check every 30 seconds. If a change

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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