我可以将SQL的IN（...）语句用于namedQuery吗？

Question

How can I use IN at my namedQuery?

@NamedQueries(  
 {   
 @NamedQuery(name = "GetAvailableProducts", query = new StringBuilder("").append("SELECT   p   FROM Product p WHERE p.type= :type AND (p.available IN ('I want to define changeable size of an array or sometinhg like that') OR p.available = :available)")),  
 }

I mean that I can set 'type' parameter (I defined it as a variable----> :type) and I want to define variables inside of IN statement to. However the number of parameters are not constant. I want to define an array or something like that :array[] and I want to set it when I call that namedQuery.

Answer 1

NamedQuery

@NamedQueries(  
{   
 @NamedQuery(name = "GetAvailableProducts", query = "FROM Product p WHERE p.type= :type AND (p.available IN (:availableCollection) OR p.available = :available)",  
}

Set parameters

Hibernate :

query.setParameterList('availableCollection', yourCollection);

JPA :

query.setParameter('availableCollection', yourCollection);

Answer 2

Did you try something like

SELECT   p   FROM Product p WHERE p.type= :type AND (p.available IN 
('foo', 'bar') OR p.available = :available)

(if "available" is a string)

or

SELECT   p   FROM Product p WHERE p.type= :type AND (p.available IN 
(1, 2, 3) OR p.available = :available)

(if available is a number)?

Answer 3

Expression 'IN' in JPQL is equal to writing multiple 'OR' statements, in your case an example of 'IN' would be:

... p.available IN ('US', 'GB') ...

Which I believe is equal to:

... p.available = 'US' OR p.available = 'GB' ...

Here's a link that explains it well: OpenJPA: IN Expression

EDIT PS Assuming p.available is String (character type)

EDIT2 The author has edited question so many times that I can't follow up him :) As for the actual question about passing array for IN-expression, here's a link of similar question on StackOverflow: JPQL IN clause - Arrays