8 | ODB-WeakRefPurger threads not closing at all Connection (using JDO and PersistenceManager) and not closing any of it. I've counted the DB connections during whole run of the application and it was +- the same as count of live WeakRefPurger |
8 | Optimistic Locking Counter { private int count; void increase() { count++; } } } For optimistic |
8 | Index on a low cardinality column (e.g., a count query, as part of a composite index, etc.), so the recommendation is to try a simple ... . For example, an index on a gender field can be helpful in count queries that only return the numbers |
8 | Group by date / time DAY() in ODB. So, how to build queries similar to something like this: SELECT COUNT(id) FROM ... something like this: SELECT COUNT(id) FROM stats WHERE YEAR(record_date) = 2009 GROUP BY DATE |
8 | EmbeddedId with Generated field value / mapped superclass. support Support It's a good suggestion. But this way how objectDB would count each ... limit ... Thank you Slinky Silvio Ornano Every object is count once even if it is an instance |
8 | mappedSuperClass and subClass Duplicates However, it appears that the super classes in the explorer count toward the ten (10) table limit for the free ... , DataNucleus, etc.). Accordingly, a mapped superclass is counted as an entity class. support Support |
8 | Speeding up reporting queries with size() on list is between 500ms and 1.2 sec. The same query without counting products runs in 15-30ms each time. My question is - how to speed this type of queries, where you have to count objects on some lists |
8 | Help with 'not like/lower' query Criteria with a combination of LOWER/UPPER - NOT LIKE: SELECT COUNT($1.id) FROM User $1 WHERE ($1.owningCompany=:p1) AND LOWER($1.email) NOT LIKE :p2 So in essence, I'm trying to do a count |
8 | Replication error - parsing objectdb config and then attempts to count the number of Points using a connection to the slave database ... replicatedQuery = replicatedManager.createQuery("SELECT COUNT(p) FROM Point p"); System.out.println |
1 | Unexpected error when loading all entity instance object count: 1041631 (expected 1041630) BTree Value Errors ------------------ [1] com.mvolution.domain.entities.misc.LogEntry - Unexpected object count: 773 (actual 772) Page Relation |
