Count any matching object from the space, visible under the default transaction.
            
- template (Object)
 - The template/query used for matching.
 
Number of matching entries.
| Exception | Condition | 
|---|---|
| UnusableEntryException | A serialized field of the object being read cannot be deserialized. | 
| TransactionException | Transaction error occured. | 
| InactiveSpaceException | The space is in backup mode and therefore is not active. | 
| SqlQueryException | The query template is an illegal SqlQuery. | 
