 11 | /questions/35359676/java-jpa-objectdb-pre-detach-loading-why-retrieval-by-navigation-and-access ... system a BooleanValue wrapper is ultimately an Element that can be referenced by ID, and meets ... boolean value is not the whole story. By JVM optimizations I meant JIT Compiler optimizations and not |
11 | order to be visible to the query. Flush policy in JPA is represented by the FlushModeType enum ... since the setter methods in Query and TypedQuery support method chaining (by returning the query object ... ObjectDB the default is COMMIT (which is more efficient). The default mode can be changed by |
11 | , of type ECompoundKeyMapItem, identified by their "key" within the EContainer class. The items ... "ECompoundKeyMapSubItem", identified by their keys. The embeddedId for the item class, ECompoundKeyMapItemId ... = parent;
}
[ObjectDB 2.3.0_01] Unexpected exception (Error 990)
Generated by Java HotSpot(TM |
11 | Hello, we opened a transaction, load an entity from database and removed this entity by em.remove(). Afterwards the entity can be load again by query although the resulted entity have an attribute ... : ObjectDB uses snapshots in order to isolate transactions, i.e. to hide uncommitted flush changes |
11 | = em.createQuery(
"SELECT g FROM Guest g ORDER BY g.id", Guest.class);
return ... Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right |
11 | (
"SELECT g FROM Guest g ORDER BY g.id", Guest.class);
return query ... Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right |
11 | of a corrupted ObjectDB database file Repairs a corrupted ObjectDB database file by creating a new ... - if recovery file is disabled. Using the database file simultaneously by two instances of the ObjectDB ... the database file externally not through ObjectDB (e.g. by malicious software such as a computer |
10 | ), count(ov) from ObjectView ov group by hour(ov.created) order by hour(ov.created) ASC where ov ... have to group by date(). For few queries I was concatenating 'date' from year()-month()-day() calls ... implementation. There is only one small problem with new version. When you group by date |
10 | ObjectDB ignores lazy setting of non collection mapped by (inverse) fields and loads them always eagerly. This is allowed by JPA since lazy is only hint but it is not efficient. The reason ... , at least as hollow objects. In order to instantiate referenced objects their exact type is needed |
10 | through mapped by to-many relationships. Please check the new build. If you still get the exception we may need a test case that demonstrate the issue in order to explore it further. Thanks, no exception |