 21 | Hello, I would like to know if it's possible to copy the content of a table representing one class of object to another table whithout having to use java object (no object instantiation) ? In fact, I ... a table before erasing the content. Thanks. You will have to write code for this purpose. Use enhanced |
21 | Hello , I've relational db , and there is some table named enumerations with , some key and values ... application configs. Like;
tablename : enumeration
table rows:
key value
servername ...
@Table(name="enumerations")
public class Enumerations {
//Field binding possible like |
21 | Please I have being working on an application, and I am experiencing some challenges populating my javaFx table from ObjectDB, Please I don't know if I can get a sample code for populating javaFx table from ObjectDB that could aid my Project. You may check the following links: https://ajimenezr |
21 | Is there a build-in way to encrypt object fields or entire "tables" with annotations? If not, are there any recommended design patterns? Thanks Please see this feature request in the issue tracking. If you need selective encryption of types / fields - please describe your suggestion in that issue thread. mrbahr2003 |
21 | when trying to execute in explorer (max heap size 1GByte) delete from LogEntry l it comes up with a Java heap error after 20 minutes of executing. How to empty such a table ? This may be because the transaction size is limited by the heap size. You can try deleting these objects in batches |
21 | Hi, I want to drop one column from my database table suppose i have 3 column (id, name, address) now i want to drop address. then what will be the query or procedure.. Just remove the field from the entity class. See Automatic Schema Evolution. Space in the database file will be reclaimed lazily |
21 | reading from table gives Unexpected exception [ObjectDB 2.6.3] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_131 (on Windows 10 10.0). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb |
21 | Let's say I no longer need some entity in my project and after deleting all the objects of this type in database I want to remove this type from schema. How can I do this? Is there something like SQL 'drop table' in ODB? This is currently not supported. As far as I understand the main effect |
20 | of logical operators, as shown in the following table: Set 1 - JPQL / SQL Set 2 - Java / JDO AND && OR ... must be one of: TRUE, FALSE, and NULL. The following table shows how the AND operator is evaluated based ... must be one of: TRUE, FALSE, and NULL. The following table shows how the OR operator is evaluated based |
17 | ObjectDB supports two sets of comparison operators, as shown in the following table: Set 1 - JPQL ... The following table shows how NULL values are handled by each comparison operator. One column presents ... . When both operands are not NULL (not shown in the table) the operator is evaluated to either TRUE or FALSE |