About COUNT

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Forum
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Performance issues on aggregate query

we are using this aggregate query to collect some data: select p3.doubleValue,c1.classIdentifier,c1.objectName,sum(p4.doubleValue),sum(p4.doubleValue*p5.doubleValue),0,p7.doubleValue,p3.name,count(o) from ObjectNode o INNER JOIN o.properties p1 INNER JOIN o.properties p2  INNER JOIN o.properties p3
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1

persitencia (Preguntas y respuestas)

implementation by subclassing AbstractTableModel: Implement getRowCount() with a SELECT COUNT query
Forum
1

Removing entity class

, but there are still in ObjectDB database. The 2 tables for these entities are empty, but the tables exist, so they count
Issue
1

Server out of memory exceptions

. How many open databases do you use concurrently? Following the thread dump I count about 9 open
Forum
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Should derived fields of an EmbeddedId be manually maintained by app code?

.TestException; @Entity @NamedQueries({ @NamedQuery(name = "numberOfMapItems", query = "SELECT COUNT(x
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Sorting problem

> list(     int start, int count, String sortColumn, boolean isAscending) I have to prepare correct
Issue
1

Use temporary files to enable very large transactions

ObjectDB classes. The count of byte arrays grows after flush and clear, although we start the GC
Forum
1

Wrong data stored in time only fields

();         }         em.getTransaction().commit();         Query q = em.createQuery("SELECT COUNT(r) FROM
Forum
1

Eclipse plugin problem (using ObjectDB as a separate bundle)

from top), click Validate Plugin-ins button (third on right from below, counting vertically from
Issue
1

Getting an error when adding activation code to conf file

(); Query q1 = em.createQuery("SELECT count(my) from MyEntity