Develop Reference

Convert SQL Query to Criteria Query in Spring Boot

I'm relatively new to Spring JPA CriteriaQuery. Im trying to convert my old native query in my program to criteria query and haven't been successful on join query for multiple table with conditions. I need help converting native SQL query into Criteria Query for these query below :
select * from student s inner join (
select distinct on (student_id) * from class where status = 'Active' order by
student_id,date_register desc) c on s.id = c.user_id
inner join teacher t on t.subject_id = c.subject_id
where t.status = 'Active' and s.status='Active' order by s.name desc
Update :
Below code is as far as I can go cause I dont really know much. Am i in the right direction? I'm opting for Expression because i dont know how to use Join.
CriteriaQuery<Student> query = cb.createQuery(Student.class);
Root<Student> sRoot= query.from(Student.class);
query.select(sRoot);
Subquery<Integer> subquery = query.subquery(Integer.class);
Root<Class> cRoot= subquery.from(CLass.class);
Expression<Integer> max = cb.max(cRoot.get("dateRegister"));
subquery.select(max);
subquery.groupBy(cRoot.get("student"));
query.where(
cb.and(
cb.in(cRoot.get("dateRegister")).value(subquery)
)
);
Thanks in advance!

db2 sqlstate 42972 error

I am getting this error when I am trying to execute this sql query
INSERT INTO
AGG_QUALITY
SELECT
QIF.DATEDM_ID,
'Status' AS BREAKDOWN_TYPE,
HCR.VALUE,
QIF.SCANDEFINITION_ID,
QIF.QUALITYISSUE_VALUE,
COUNT(QIF.QUALITYISSUEFACT_ID),
COUNT(QRF.QUALITYRESOLUTIONFACT_ID)
FROM
QUALITYISSUEFACT QIF,
HUBCODERECORD HCR,
ITEMSTATUS ITS
LEFT JOIN
QUALITYRESOLUTIONFACT QRF
ON
QIF.QUALITYISSUEFACT_ID = QRF.QUALITYISSUEFACT_ID
WHERE
QIF.DATEDM_ID > startDateDMId
AND QIF.DATEDM_ID <= endDateDMId
AND HCR.CODE = ITS.H_STATUS_TYPE
AND QIF.DIMENSION_ROM_PK = ITS.ITEMMASTER_ID
GROUP BY
QIF.DATEDM_ID, HCR.VALUE, QIF.SCANDEFINITION_ID, QIF.QUALITYISSUE_VALUE
;
DB21034E The command was processed as an SQL statement because it was not a
valid Command Line Processor command. During SQL processing it returned:
SQL0338N An ON clause associated with a JOIN operator or in a MERGE statement
is not valid. LINE NUMBER=31. SQLSTATE=42972

Try like below with inner joins:
INSERT INTO
AGG_QUALITY
SELECT
QIF.DATEDM_ID,
'Status' AS BREAKDOWN_TYPE,
HCR.VALUE,
QIF.SCANDEFINITION_ID,
QIF.QUALITYISSUE_VALUE,
COUNT(QIF.QUALITYISSUEFACT_ID),
COUNT(QRF.QUALITYRESOLUTIONFACT_ID)
FROM
QUALITYISSUEFACT QIF
INNER JOIN
HUBCODERECORD HCR
ON QIF.DIMENSION_ROM_PK = ITS.ITEMMASTER_ID
INNER JOIN
ITEMSTATUS ITS
ON QIF.DIMENSION_ROM_PK = ITS.ITEMMASTER_ID
LEFT JOIN
QUALITYRESOLUTIONFACT QRF
ON
QIF.QUALITYISSUEFACT_ID = QRF.QUALITYISSUEFACT_ID
WHERE
QIF.DATEDM_ID > startDateDMId
AND QIF.DATEDM_ID <= endDateDMId
GROUP BY
QIF.DATEDM_ID, HCR.VALUE, QIF.SCANDEFINITION_ID, QIF.QUALITYISSUE_VALUE
;
see if it helps

Had the same error here. (note, my Table1 has NO rows)
On my side I could solve it by changing the additional (comma separated) table2 to a REAL inner join.
Example from
select xxx from Table1 t1, Table2 t2
where (t2.col1 = t1.col1) and (t1.col2 = "whatever")
to
select xxx from Table1 t1
INNER JOIN Table2 t2 ON (t2.col1 = t1.col1)
where (t1.col2 = "whatever")
Hope this helps someone else.
(problem occured on DB2 9.7)

How do I write this JPQL query with subquery?

I'm trying to traduce that SQL sentence
SELECT
operationalobjective.idoperationalobjective,
pno_oo.name
FROM
public.operationalobjective,
public.policynamedobject pno_oo
WHERE
pno_oo.idpolicynamedobject = operationalobjective.idoperationalobjective AND
operationalobjective.idoperationalobjective NOT IN
(
SELECT
operationalobjective.idoperationalobjective
FROM
public.operationalobjective,
public.goal,
public.policy,
public.policynamedobject pno_oo,
public.policynamedobject pno_p
WHERE
goal.idpolicy = policy.idpolicy AND
goal.idoperationalobjective = operationalobjective.idoperationalobjective AND
pno_oo.idpolicynamedobject = operationalobjective.idoperationalobjective AND
pno_p.idpolicynamedobject = policy.idpolicy AND
policy.idpolicy = <number>
);
Having in mind Policy and OperationalObjective both extends PolicyNamedObject, I'm trying to traduce that into JPQL:
SELECT oo FROM OperationalObjective oo
WHERE oo.idoperationalobjective NOT IN
(
SELECT oo.idoperationalobjective
FROM OperationalObjective oo, Goal g, Policy p
WHERE g.policy = :policy AND g.operationalobjective = oo AND p = :policy
)
But when I execute that query via JPA, it raises an exception saying:
ERROR: missing FROM-clause entry for table <<t5>>
SELECT t7.idpolicynamedobject, t7.type, t7.description, t7.name, t0.idoperationalobjective, t0.idobjectivescategory
FROM public.OperationalObjective t0 INNER JOIN public.PolicyNamedObject t7 ON t0.idoperationalobjective = t7.idpolicynamedobject
WHERE (NOT (t0.idoperationalobjective IN
(
SELECT t5.idoperationalobjective
FROM public.OperationalObjective t1 CROSS JOIN public.Goal t2 CROSS JOIN public.policy t3
INNER JOIN public.PolicyNamedObject t4 ON t3.idpolicy = t4.idpolicynamedobject
INNER JOIN public.PolicyNamedObject t6 ON t5.idoperationalobjective = t6.idpolicynamedobject, public.OperationalObjective t5
WHERE (t2.idpolicy = ? AND t2.idoperationalobjective = t5.idoperationalobjective
AND t3.idpolicy = ?) AND t6.type = ?))) AND t7.type = ?} [code=0, state=42P01]
I've executed the SQL sentence using PgAdmin and it retrieved what I wanted, but I don't know what I am doing wrong translating it into JPQL... any idea?
Thank you in advance :)

I suspect you will need to refactor your JPQL statement to use subquery 'EXISTS' as the IN statement doesn't support a sub select. Hopefully this will point you in the right direction.
SELECT oo FROM OperationalObjective oo
WHERE NOT EXISTS
(
SELECT oosub
FROM OperationalObjective oosub
JOIN oosub.goal g
JOIN g.policy p
WHERE <<where conditions>>
)
Oracle docs

JPA Criteria Group By

I have got the following problem, maybe somebody can help me.
I wrote a SQL query:
SELECT v.bezeichnung, count(*) as total
FROM veranstaltung v
JOIN auffuehrung a ON v.id = a.veranstaltung_id
JOIN platz p ON p.auffuehrung_id = a.id
JOIN transaktion t ON t.id = p.transaktion_id
WHERE t.status = 2 AND (a.datumuhrzeit + 30 DAY) >= CURRENT_DATE
GROUP BY v.bezeichnung
ORDER BY total DESC
I have to implement it in JPA but everything works except GROUP BY... it can't be grouped..
CriteriaBuilder builder = this.entityManager.getCriteriaBuilder();
CriteriaQuery<Veranstaltung> query = builder.createQuery(Veranstaltung.class);
Root<Veranstaltung> rootVeranstaltung = query.from(Veranstaltung.class); query.where(builder.equal(rootVeranstaltung.join("auffuehrungen").join("plaetze").join("transaktion").<Transaktionsstatus>get("status"), Transaktionsstatus.BUCHUNG));
query.groupBy(rootVeranstaltung);
List<Veranstaltung> result = this.entityManager.createQuery(query).getResultList();
return list;
I haven't finished the code yet, e.g. the COUNT..
should i write COUNT already before GROUP BY or would it work without COUNT?

complex query to equivalent criteriabuilder query(EntityManager)

My Query is this:
query1 = select a.id from entity1 a where a.id in (:List1)
and not exists (select ex2 from entity2 ex2 where ex2.assignedId = a.id)
union
select ex.assignedId from entity2 ex ,entity3 pi
where ex.entity3Id = pi.id and ex.assignedId in (:List1)
and ex.assignedTypeId = :assignedTypeId and pi.processStatus = :status
and not exists
(select ex1.assignedId from entity2 ex1 , entity3 pi1
where ex1.entity3Id = pi1.id and ex1.assignedId = ex.assignedId
and ex1.assignedTypeId = :assignedTypeId
and pi1.processStatus <> :status);
and while trying to execute query,
Query existingIds=em.createQuery(query1); //With all parameters set
throws NullPointerException in line 87 of org.hibernate.hql.ast.ParameterTranslationsImpl
completely checked all the braces and parameters. The equivalent conversion works in mysql.
Can someone assist me in converting the query with CriteriaBuilder, finding it difficult to make the conversion.

Not sure if JPQL supports union operation at all. Are you putting this as NamedQuery or you are creating on the fly (entityManager.createQuery()) ?