About delete

forum_thread

Null enums and IS (NOT) NULL: NullPointerException

Hello. I'm getting NullPointerException when adding %enum field% IS (NOT) NULL or == (!=) NULL in WHERE clause. The same exception using CriteriaQuery. ... edit delete Vladiator ... edit delete support ...

 
api-jdo

Value.deleteAction

Delete action to apply to any foreign key for the value.(Annotation Element of javax.jdo.annotations.Value)

 
issue

@FetchGroup in JPA similar to JDO

I was checking what's new in different JPA implementation on the market and found quite interesting two features. First of those features is described in this ticket. It's similar to FetchGroup from JDO. It works like this. First you specify attributes to fetch from database: ... edit delete lwalkowski ...

 
api-jdo

Element.deleteAction

Delete action to apply to any foreign key for the element.(Annotation Element of javax.jdo.annotations.Element)

 
issue

Enhancer API (JDO 3.0)

One of the new features of JDO 3 is a standard API for enhancement. JDO implementations, including ObjectDB, define their own API for enhancement    ... edit delete support ...

 
issue

Web Application Tutorial

A tutorial that demonstrates how to use ObjectDB in a web application should be written and added to the Tutorials section.... edit delete support ...

 
issue

Read only hint for query

Second thing after @FetchGroup I've found is read-only hint for EM. You can specify this hint to EM when executing query meaning that returned data will never be edited or persisted. My understanding of this is that each entity returned from query is in detached state as default state. query.setHint("odb.read-only", "true"); This could be useful in situation when you are sure, that you won't modify those entities - like listing entities, paging, logging, reporting. ... edit delete lwalkowski ...

 
forum_thread

Git seems not to commit objectdb.conf

git version 1.8.4.1 (Mac OS X) For some reason my Git seems to be "ignoring" (although not in .gitignore) the web/WEB-INF/objectdb.conf in a web app. I can't find anything about the .conf suffix being ignored. Has anybody noticed this and/or found a solution ? ... edit delete webel ...

 
issue

Support Attribute Conversion for Persistence

The @Converter annotation and the Attribute Converter interface have two big benefits: 1) They make it possible to persist as-yet-unsupported java types (in the example below, Period - part of the 1.8 java.time package. (It could just have well shown conversion to and from SQL Timestamp objects.  2) They also make it possible to persist custom objects that are fundamental to your domain in an efficient manner.  ... edit delete rpnman ...

 
forum_thread

Waterfall tree algorithm for more optimized version of objectdb or

hello , i heard its very good and new datastructure known as waterfall tree compared to btree. It could be good if you think and research some datastructure or take a look at waterfalltree Or it can be selectable by objectdb :   here what i talk about :  http://stsdb.com/stsdb-w4.0/technology/waterfalltree/overview   the documentation tells , it makes db very fast here is algorithm on youtube :  ... edit delete kadirbasol ...