how to Use UNION and Order by Clause in my JPQL Query - eclipselink

Question

I am using eclipse link as a JPA in my project. the current jar i am using is eclipselink-2.5.2.Coming to my Question,
I want to use Order by in UNION combination. My JPQL query looks like following
select req from Rqst req
WHERE (req.Applc =:SYSTEM_IDENTIFIER1 AND req.procesTyp =:PROCESS_TYPE1 AND UPPER(req.updtBy) =:UPDATED_BY1)
AND req.stat <> :ignoreDeletedRequests
UNION
select req from Rqst req
WHERE (req.Applc =:SYSTEM_IDENTIFIER2 AND req.procesTyp =:PROCESS_TYPE2 AND UPPER(req.updtBy) =:UPDATED_BY2)
AND req.stat <> :ignoreDeletedRequests
UNION
select req from Rqst req
WHERE (req.Applc =:SYSTEM_IDENTIFIER3 AND req.procesTyp =:PROCESS_TYPE3 AND UPPER(req.updtBy) =:UPDATED_BY3)
AND req.stat <> :ignoreDeletedRequests
ORDER BY req.rqstId ASC
With out Order by it is working for me. But when i use Order by I am getting The query contains a malformed ending.
Can any help me here i am stuck for long time.

Answer 1

I had the problem as you. I solved that problem by using Collection.sort() like that:
Collections.sort(listObjects, new Comparator<Object[]>() {
#Override
public int compare(final Object[] record1, final Object[] record2) {
int c;
c = convertTime(record1[0].toString()).compareTo(convertTime(record2[0].toString()));
if (c == 0) {
c = record1[1].toString().compareTo(record2[1].toString());
}
if (c == 0) {
c = record1[2].toString().compareTo(record2[2].toString());
}
if (c == 0) {
c = new Long(Long.parseLong(record1[3].toString())).compareTo(Long.parseLong(record2[3].toString()));
}
if (c == 0) {
c = ((Date) record1[4]).compareTo(((Date) record2[4]));
}
if (c == 0) {
c = ((Date) record1[5]).compareTo(((Date) record2[5]));
}
if (c == 0) {
c = new Long(Long.parseLong(record1[6].toString())).compareTo(Long.parseLong(record2[6].toString()));
}
return c;
}
});
You can use Collention.sort() to order multiple fields;