30 | Threading Problem (maybe with Criteria) would a ConcurrentLinkedHashMap). FETCH thread nr (36) count: 982 UIDs in 26 msek FETCH thread nr (41) count: 982 UIDs in 29 msek FETCH thread nr (44) count: 982 UIDs in 14 msek FETCH thread nr (39) count: 982 UIDs in 25 msek FETCH thread nr (42) count: 982 UIDs in 31 msek FETCH thread nr (40) count |
23 | EntityManagerFactory Fails To Swtich Over To Slave When Master Is Unavailable); System.out.println("COUNT = " + i); em.close(); try { Thread.sleep(1500); } catch ... ("SELECT p FROM Point p", Point.class); List<Point> results = query.getResultList(); int count = 0; for (Point p : results) { System.out.println(p); if(count++>5) { break |
20 | Join performance in ObjectdbSELECT count(e) FROM Meta e, ImageNet i, Page p WHERE e.idImage=i.id AND e.idPage=p.id; So simple ... can predict the time for such counting? TIA gzdillon Lai Yang Now, after 2 hours ... of your query would be: SELECT count(e) FROM Meta e, ImageNet i, Page p WHERE e.image=i AND e.page=p |
11 | JPA Criteria API Queries, count, sum, avg, min, max, ...). ORDER BY clause (orderBy, Order, asc, desc). The links |
11 | JPA Query Structure (JPQL / Criteria) GROUP BY / HAVING (groupBy, having, count, sum, avg, min, max, ...). Criteria ORDER BY (orderBy, Order, asc, desc). |
10 | javax.persistence.criteria.CriteriaBuilder item Since: JPA 2.0 Expression<Long> count( Expression<?> x) Create an aggregate expression applying the count operation. Create an aggregate expression applying the count operation. Parameters: x - expression representing input value to count operation Returns: count expression Since: JPA 2.0 |
6 | countDistinct(x)Method javax.persistence.criteria.CriteriaBuilder Expression<Long> countDistinct( Expression<?> x ) Create an aggregate expression applying the count distinct operation. Parameters: x - expression representing input value to count distinct operation Returns: count distinct expression Since: JPA 2.0 |
3 | Issue with UPPER ? COUNT($1) FROM com.lexware.vereinsverwaltung.verein.mitglied.Mitglied $1 LEFT JOIN $1.mitgliedschaft $2 ... LIKE '%81%'))))) # Case (2) SELECT COUNT($1) FROM com.lexware.vereinsverwaltung.verein.mitglied ... %')))))) # Case (3) SELECT COUNT($1) FROM com.lexware.vereinsverwaltung.verein.mitglied |
3 | Issue with cascade delete & add/remove(); } private static void printCounts(EntityManager em) { int Address_1_Count = ((Long) em.createQuery( "SELECT COUNT(a) FROM Address a WHERE street = '1'") .getSingleResult()).intValue(); int Address_2_Count = ((Long) em.createQuery( "SELECT COUNT |
1 | [ODB1] Chapter 7 - JDOQL Queries objects can be obtained using the size() method: int count = result.size(); Iteration |
