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As far as JPQL goes, this is not allowed. See the rule in the spec:

 
                                                                in_expression ::=
{state_valued_path_expression | type_discriminator} [NOT] IN
{ ( in_item {, in_item}* ) | (subquery) | collection_valued_input_parameter }

It should be doable with the MEMBER OF predicate:

 
                                                                collection_member_expression ::= entity_or_value_expression
[NOT] MEMBER [OF] collection_valued_path_expression
entity_or_value_expression ::=
single_valued_object_path_expression |
state_field_path_expression |
simple_entity_or_value_expression
simple_entity_or_value_expression ::=
identification_variable |
input_parameter |
literal
 
                                                            

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