About Data Set

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JDO Doc
22

javax.jdo.JDOEntityManager

string resultSetMapping - the name of the result set mapping Returns: the new query instance Since: JPA ... ) Delete the persistent instance from the data store. Delete the persistent instance from the data store. This method must be called in an active transaction. The data store object will be removed
Result
21

Privacy Policy

sets out the different areas where user privacy is concerned and outlines the obligations ... and protects user data and information will also be detailed within this policy. The Website ... settings to block all cookies from this website and its external serving vendors. This website uses
JDO Doc
21

javax.jdo.PersistenceManager

1.0 void deletePersistent(Object pc) Delete the persistent instance from the data store. Delete the persistent instance from the data store. This method must be called in an active transaction. The data store object will be removed at commit. Unlike makePersistent, which makes the closure
Manual
20

Locking in JPA

update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... - which represents an exclusive lock. Setting a Pessimistic Lock An entity object can be locked ... can be set to allow waiting for a pessimistic lock for a specified number of milliseconds. The hint
Manual
20

Server User List

and specifies their specific settings (username, password, permissions, quota). The default ... ") specifies if the user is a superuser. A superuser is authorized to manage server settings using ... definition. All the settings of that master definition are automatically inherited by all the other user
Manual
19

Comparison in JPQL and Criteria API

ObjectDB supports two sets of comparison operators, as shown in the following table:   Set 1 - JPQL / SQL Set 2 - Java / JDO Less Than < < Greater Than > > Less Than or Equal To <= <= Greater Than or Equal To >= >= Equal = == Not Equal <> != The two sets differ in the Equal and the Not Equal
Manual
19

Database Replication and Clustering

database. Setting a Master Database A master ObjectDB database is an ordinary database ... , but no other preparations or settings are required. Setting Slave Databases Setting slave databases is very easy ... the configuration:          <data path="$objectdb/db
Issue
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Best practise loading big data

is the main data provider within our solution. In the past we often discovered performance problems when it came to transactions with lots of entities. We have a scenario in which we need efficient data ... we access the data block by block - in each block step by step and in each step value by value
Manual
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SELECT clause (JPQL / Criteria API)

The criteria query API provides several ways for setting the SELECT clause. Single Selection Setting ... .get("currency")).distinct(true); The select method takes one argument of type Selection and sets it as the SELECT clause content (overriding previously set SELECT content if any). Every valid criteria
Forum
17

Wrong data stored in time only fields

This may be related to the fix for the problem described in this thread: Wrong data stored in date ... . Except we are using ObjectDB 2.6.4_08, the system time zone is set to EST and both the OS and JVM are using the 2015g time zone data. While we cannot see a problem with date only fields (more testing