About primary key

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Issue
3

InternalException when using MEMBER OF on a large list in a query

with long primary keys. In such objects the keys may not be embedded in the object content ... objects with long primary keys is not very efficient, because non embeddable keys are slower. If possible, try to avoid primary keys longer than 32 bytes (in the test they seem to be 36 bytes). Thanks
Forum
3

Composite Index error 328

key. The primary key is automatically indexed and cannot be added to user defined indexes. on mysql , i can make primary key as composite index. I can give secondary index. is  it impossible for objectdb ? Yes, a composite index that includes primary key fields is currently not supported by ObjectDB
JDO Doc
2

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
2

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
2

How best to unbind all names?

a 'name' field, which may be set as a primary key or as a unique index. This will also solve the orphan ... that it would provide fast lookup, and the bookmark name I use is in fact simply the object primary key (a String ... even on the primary key would be slow. The created schema is in fact recognizing the existence
Forum
2

World database - Changing country ID

to change field which is primary key? If so what am I doing wrong? Thanks Changing the primary key ... it. If you have to change the primary key you should create a new entity object with the new primary key and delete the old entity object (and of course, update relevant references). Regarding the primary key in
Manual
2

FROM clause (JPQL / Criteria API)

, IN, INDEX, INNER, IS, JOIN, KEY, LEADING, LEFT, LENGTH, LIKE,LOCATE, LOWER, MAX, MEMBER, MIN, MOD
Manual
2

Database Schema Evolution

long as the keys and values are convertible (e.g. from HashMap to TreeMap). Any
Result
2

About ObjectDB Database

, etc.) but in a way that makes development easier and applications faster. ObjectDB Database Key Features
Result
2

About ObjectDB Database [2017-10-24]

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