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. Often some of these String are empty (""). To avoid unnecessary memory consumption, the String within the entities are initialized like: String firstName = ""; In this case every "empty" attribute shares the same String. But after reloading the entities from objectdb, every empty

> a  JAR File and executed via "Java -Jar xyz.jar", I get either empty results or on Thanks for any help.   Marvin.Hansen Marvin Hansen Empty results or NoResultException may be caused by accessing an empty database.

: if an embedded collection is empty, but I attempt to LEFT JOIN FETCH all the members of a collection within a (non-existent) member of the first collection, the result of the overall query is an empty set. If I have an instance of C where bList is empty

Possible issue for JPQL IS EMPTY comparison expression: SELECT e FROM MyEntity e WHERE e.collection-valued IS EMPTY throws javax.persistence.PersistenceException: Invalid operand type  for operator IS EMPTY (error 756) Thanks.

The field is emptied, but not null. So, my @ElementCollection Set<Integer> fields become empty sometimes during development while schema changes, but not ... day ago, when some fields got empty again (but not null). (basically...an empty HashSet<Integer

Support I'm now getting an empty set returned on empty database. Thanks!!!! pedwards Paul Edwards

Hi, I have posted a question on Stack Overflow but there is limited support for ObjectDB on there, so I will post it here. It is a lot clearer on empty-user-database-with-objectdb?noredirect=1#comment31099101

. If we take a look into the dat files they are all (with exception of the first one) empty. Or

. IS [NOT] EMPTY The IS [NOT] EMPTY operator checks whether a specified collection is empty or not. For example: c.languages IS EMPTY is TRUE if the collection is empty

that I use JPA criteria query API, and I pass an empty collection to IN expression: empty by ... exception itself is nothing wrong here I guess (at least other JPA providers also throw on empty IN