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null Query
select a from Action a
where a.objectsInCharge.nodePath like "/(PR)W4455NS01 |
20 | Objectdb ignores not null annotations |
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14 | > Set Reference > Set to Null command is used to set a reference to null. The Edit > Set Reference ... command depends on the context. Deleting a reference field sets the value to null without deleting any ... to Collection > Add Null command is used to add a null value. The Edit > Add to Collection > Add Existing Entity |
14 | > Set Reference > Set to Null command is used to set a reference to null. The Edit > Set Reference ... command depends on the context. Deleting a reference field sets the value to null without deleting any ... to Collection > Add Null command is used to add a null value. The Edit > Add to Collection > Add Existing Entity |
13 | through a NULL value The following query retrieves country names with their capital city names:
SELECT ... is evaluated to NULL and c.capital.name is an attempt to navigate from a NULL value. In Java, a NullPointerException is thrown on any attempt to access a field or a method via a null reference. In |
13 | have any matching inner value it gets at least a NULL value as a matching value in the FROM iteration. Therefore, a Country c with no Capital city has a minimum representation of (c, NULL) in the FROM ... JOIN variant returns Nauru with a NULL value as its capital. [LEFT [OUTER] | INNER] JOIN FETCH JPA |