Converting Native SQL to EJB ql

Question

Hi there
Simple enough question, how would I go about converting the following native SQL query into EJB QL syntax. This by the way is a simple search on keywords attributed to a person.
SELECT PersonId, COUNT(word)
FROM keyword_table
WHERE word = 'a' OR word = 'c' OR word = 'b'
GROUP BY PersonId HAVING COUNT(word) <= 3
ORDER BY COUNT(word) desc
Note that PersonId is a foreign key joinColumn to a Person entity bean, Ideally i want to be returning person objects through a foreign key in my interest table using GROUP BY etc. I had something like this in mind:
select Person p FROM Interest i WHERE i.Word = 'a' OR i.Word = 'c' OR i.Word = 'b'
GROUP BY i.Person.PersonId HAVING COUNT(i.Word) <= 3
ORDER BY COUNT(i.Word) desc
Kind Regards
- Vaughan Cross

Answer 1

suppose there are two beans "Account" and "Transrecord" with 1-to-m relationship, the mapping table is "ACCOUNT"(PK is ACCID) and "TRANSRECORD"(FK is ACCID)
The cmr field in Account is "transrecords" and the cmr field in Transrecord is "theAccount".
For a SQL statement (this statment may be not that meaningful, but it is for testing the function of my translation tool):
SELECT t.* FROM TRANSRECORD t , ACCOUNT A WHERE a.ACCID = t.ACCID
>>
one other way of translation would be
Select object(t) from account a,transrecord t where a.accid = a.transrecords.accid
select q1.*
from TRANSRECORD q1, ACCOUNT q2
where ( q2.\"ACCID\" IS NOT NULL ) and ( q2.\"ACCID\" = q1.\"ACCID\")");
Since ACCID is the primary key of ACCOUNT table, so "q2.ACCID IS NOT NULL " is always true, the >>SQL statement is equivalent
with the oringinal SQL statement.isn't it what is supposed to happen since you cannot have a record in the foreign key table without a corresponding record in the primary key table?
I tested it in Transrecord bean as a defined EJB-QL in WSAD, the generated SQL statement after the >>deployment is:I am using WSAD 5.1, which file has the converted SQLs?
sanjay.