Quantified predicates
A quantified predicate compares a value with a set of values produced by a subselect. Use the syntax:
expression comparison-operator SOME | ANY | ALL ( subselect )The expression must not evaluate to a reference type. When SOME or ANY is specified the result of the predicate is as follows:
- TRUE if the comparison is true for at least one value returned by the subselect.
- FALSE if the subselect is empty or if the comparison is false for every value returned by the subselect.
- UNKNOWN if the comparison is not true for all of the values returned by the subselect and at least one of the comparisons is unknown because of a null value.
When ALL is specified the result of the predicate is as follows:
- TRUE if the subselect returns empty or if the comparison is true to every value returned by the subselect.
- FALSE if the comparison is false for at least one value returned by the subselect.
- UNKNOWN if the comparison is not false for all values returned by the subselect and at least one comparison is unknown because of a null value.
Related concepts
EJB query language
WHERE clause
Related tasks
Use EJB query