https://www.datanucleus.org/documentation/products.html

We use below components from datanucleus, since we have a plan to upgrade to Java 17 need to know the compatibility to run the below components on java 17 runtime environment. Vendor Software

Hi, if you have a class with a field of type "int" then, to find its JavaTypeMapping, DataNucleus will look at the column mappings that the adapter has registered. In your adapters case, it has

Hi everyone, Recently I have created a pull request for Spanner database adapter. While running the Datanucleus tests I have encountered an issue which made me realize that I have not fully understood

Thanks for your information Andy! Is very important for me.

Hello, DataNucleus has a datastore adapter for Informix, shown here. This was developed quite a few years ago by someone, who also provided these docs specific to the Informix adapter. I don't have

Dear colleagues: I am developing a project with Spring Boot and Informix IDS 7.31TD9, but I find that I cannot connect to the database. I tried to load the dependencies of all the versions of Informix

The discriminator is clearly in the retrieval SQL when you query for objects, but is only used to decide which type of class to instantiate. It would be part of the metadata for the class, so you

Clearly we can associate a unique (usually integer in our case) class ID / discriminator to each persistent class. Given that this class ID is always unique across all classes within our system I have

The JDO spec (12.15) explicitly insists that InstanceLifecycleListener methods are called BEFORE InstanceCallbacks, so we can't just change the code to calls to the opposite order, hence using

Hi Andy, I'm running into a bit of a catch-22 solution here and would love some ideas if you have something. I'm trying to identify all dirty fields of an object during a StoreLifecycleListener. I

Thanks. PR Created at https://github.com/datanucleus/docs-accessplatform/pull/15 Thanks, Eric

All is in GitHub, of course (link). Extensions docs are in Asciidoc format, under https://github.com/datanucleus/docs-accessplatform/tree/master/src/main/asciidoc/extensions

Hi, In reading through the Plugin documentation on the website, I noticed an oversight in the docs. How/where can I report this? I tried to look to see if there was a github repo for the website,

Non-standard SQL of that nature is specific to one RDBMS (i.e MySQL), and not supported. All SQL is in the RDBMS plugin if wanting to add (some level of) support for it. If doing so, try to make

Hi, I am using datanucleus with mySql and I am looking for a way to force an index usage in a query (JDOQL). So the generated SQL should look like "select x from T FORCE INDEX (z) where ...". I have

It knows what to update based on what methods the user calls on the collection/map. Take the example of a field of type Collection, using

I found the set of Proxy collections in the `org.datanucleus.store.types.wrappers`. I don't see any state trackers in the SCO proxies that would retain the original values before they are modified.

1. Talk to developers of TJDO, they wrote basic StateManager handling before DataNucleus existed. 2. If it kept a deep copy then you'd get an object graph stored alongside each object. A StateManager

Hi, I've been trying to work with the StateManager and its savedImage object which I had expected to be a representation of the current object at the time that "saveFields()" is called.