About bulk delete

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Manual
5

Locking in JPA

that has to be updated or deleted is checked. An exception is thrown if it is found out that an update ... deleted, and compares the version number of that object in the database to the version number
Manual
5

SELECT clause (JPQL / Criteria API)

objects, transparent update detection, support for delete, etc. Query results are not limited to entity ... efficiently. They are less productive with operations that update or delete entity objects, in
Manual
5

Database Connection using JPA

mode. drop - for deleting any existing database content (useful for tests). To connect ... ); EntityTransaction Operations that affect the content of the database (store, update, delete
JDO Doc
5

javax.jdo.Query

() Deletes all the instances of the candidate class that pass the filter. Deletes all the instances ... that were deleted, specifically not including the number of dependent and embedded instances. Dirty ... life cycle changes as if deletePersistent were called on them. Specifically, if the class of deleted
Forum
4

Server closes if large query runs out of memory

if you can provide a memory heap snapshot. The memory problem occurred during JDO deletion query, and the temp threshold was set and was low (64mb).  There is an easy work-around, which is to divide up the deletion into smaller number of objects.  I understand that JPA bulk delete doesn't involve any object
Issue
4

com.objectdb.o.InternalException: java.lang.NullPointerException

to take me a lot of work to delete data on 120 entities,  and then load bulk data in about 60 entities to load ... .  The problem is that I need to delete data on 120 entities, and then load bulk data in about 60 ... 2 empty instances of the relevant classes, rather than to use a production database and delete
JDO Doc
4

javax.jdo.JDOEntityManager

statement, e.g., for update or delete. Create an instance of Query for executing a native SQL statement, e.g., for update or delete. Parameters: sqlString - a native SQL query string Returns: the new ... ) Delete the persistent instance from the data store. Delete the persistent instance from the data
Manual
4

Database Doctor

over FTP in ASCII mode (BINARY mode should be used). Deleting an ObjectDB database recovery file or
Manual
4

Database Schema Evolution

Modifications to entity classes that do not change their persistent field definitions (their schema) are transparent to ObjectDB. This includes adding, removing and modifying constructors, methods and non persistent fields. However, additions, deletions and modifications to the persistent fields
Manual
4

General Settings and Logging

. After that period an archived log file is automatically deleted. The elements