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1

How do I achieve a Deep Fetch using JOIN FETCH?

where I need to be able to work with the whole C object, with all its parts, as a detached object. I
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Java 8 Enhancer Problem

this issue. Build 2.5.5_01 fixes this issue but it has a new bug. When I fetch, detach, change
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ObjectDB version 2.1 has been released

and TreeMap in the Explorer. Fixed detachment of entities by replacing proxy objects with ordinary
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Possible issue with LAZY Loading

or results are detached. In this case, LAZY data will not be available and will not be fetched
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Problem with @Basic(fetch = FetchType.LAZY)

from Sample s", Sample.class).getResultList().get(0); em.detach(sample); //just to be sure
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1

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
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Significant I/O costs during batch update or insert data.

Our application has some complex entities. We do batch update(merge detached entity) every 2 minutes. We find the period significant IO costs these days, and disappeared when turn off the batch updating. 1.ObjectDB is in embedded mode. 2.ObjectDB version is 2.3.7 3.Database file size is nearly
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1

Removing entity class

how to do it, for example with ObjectDB Explorer? You can retrieve all your objects, detach
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1

Mismatch client-server protocol prefix

= null;         result = (TrackerUser) q.getSingleResult();         em.detach(result);         return
Issue
1

Unexpected exception (Error 990) - Merge with no Transaction

I am frequently having an error when merging a detached object outside of a transaction. (Is this allowed? I am not trying to modify the object, just read data from it.) Here is a test case: package com.experiments; import javax.persistence.*; import java.util.HashMap; public class