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Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

Hello, I have a problem with inserting of many entities. We use strings as primary key and indices. But if the db table of the entity type contains more and more data then the inserting of further entities needs also more and more ram memory, this leads to out of memory exceptions. But if use

Insert a new entity class in a class hierarchy does not work

Hello, we have an entity class hierarchy and we want to insert a new entity in this hierarchy and our database must be automatically updated by schema evolution. Unfortunately it does not work ... would be also inserted new in the class hierarchy then it works well. See our example in the attachments. Execute

how to implement insert ignore in objectdb?

I want to implement Insert ignore in Objectdb. means if a column is declared as Unique but in case of duplicate it just ignore that row and should not throw exception. Thanks Manoj Manoj Kumar Maharana Ignoring duplicates is the default when unique is not specified, so the question is unclear

Significant I/O costs during batch update or insert data.

Significant I/O costs during batch update or insert data.

Cannot initialize db after inserting a java.util.List

Cannot initialize db after inserting a java.util.List

Cannot insert more than about 2^20 objects

Hi I have a DB with 4 entities and a total of 4 index. Once I reach 1048565 total objects in the whole DB, i am unable to insert more object, although i get NO error message nor exceptions. Doctor said Db is fine (see below) I notice that 1048565 objects + 4 entities + 4 ID indexes + 4


Enum Constant javax.persistence.CacheStoreMode USE Insert/update entity data into cache when read from database and when committed into database: this is the default behavior. Does not force refresh of already cached items when reading from database. Since: JPA 2.0


Enum Constant javax.persistence.CacheStoreMode REFRESH Insert/update entity data into cache when read from database and when committed into database. Forces refresh of cache for items read from database. Since: JPA 2.0

JPA / JDO Class Enhancer

and ANT Enhancement Enhancement can be integrated into the build process. The following Maven build ... can be also be integrated into an ANT build script, as so: <java classname="com.objectdb.Enhancer" fork ... , classes can be enhanced when they are loaded into the JVM by running the application with objectdb

Step 6: Design a BIRT Report Table

In this final step we will add a simple table to the report: Open the [Insert Table] dialog box by dragging a Table from the [Palette] window and dropping it on the report design (.rptdesign) layout. Set the column number to 2, number of details to 1, select the data set (e.g. Points by X) in

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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