About primary key

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JDO Doc
3

javax.jdo.identity.StringIdentity

(Class pcClass, String key) Constructor with class and key. Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0 int compareTo(T arg0) Parameters: arg0 - int ... : true if the class or class name is the same Since: JDO 1.0 String getKey() Return the key. Return
JDO Doc
3

javax.jdo.identity.ObjectIdentity

ObjectIdentity(Class pcClass, Object param) Constructor with class and key. Constructor with class and key. Parameters: pcClass - the class param - the key Since: JDO 1.0 int compareTo(T arg0) Parameters: arg0 ... - the other object Returns: true if the class or class name is the same Since: JDO 1.0 Object getKey() Return the key
Forum
3

Can't modify @EmbeddedId in ObjectDB Explorer

a primary key before persisting an entity, and it cannot be modified later. Therefore replacing a primary key requires creating a new entity object with the new primary key, copying the content ... to keep primary keys fixed (in RDBMS too). Accordingly, currently this feature has a low priority. zmirc
Forum
3

Mismatch client-server protocol prefix

it's happening. com.objectdb.o.UserException: Attempt to reuse an existing primary key value ... - it is weird, thanks for updating. The "Attempt to reuse an existing primary key value" exception is thrown ... ago but the primary key exception raises every few calls of our logging method. The cause is unclear
Manual
3

Database Schema Evolution

long as the keys and values are convertible (e.g. from HashMap to TreeMap). Any
Result
3

About ObjectDB Database

, etc.) but in a way that makes development easier and applications faster. ObjectDB Database Key Features
Manual
3

FROM clause (JPQL / Criteria API)

, IN, INDEX, INNER, IS, JOIN, KEY, LEADING, LEFT, LENGTH, LIKE,LOCATE, LOWER, MAX, MEMBER, MIN, MOD
Forum
3

Slow searching with two indexes

- one is the primary key (id) and so is different for each object, and the other is an object reference that only has a few tens of different values.   When I query by just the primary key, it's (of course) extremely ... to get candidates for querying the primary key.  This is the slow part.   I'm looking for a way to optimise
JPA Doc
3

MapKeyJoinColumn.name

of the foreign key column for the map key. The table in which it is found depends upon the context. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany
JDO Doc
3

javax.jdo.spi.PersistenceCapable.ObjectIdFieldConsumer

of the key field. value - the value of the field from the ObjectId. Since: JDO 1.0 void storeByteField(int ... number of the key field. value - the value of the field from the ObjectId. Since: JDO 1.0 void ... - the field number of the key field. value - the value of the field from the ObjectId. Since: JDO 1.0