SQL query grammatical exception on converting recursive query to JPQL - sql

Question

This is a JPQl query created from the below mentioned SQL query:
SELECT * FROM NursingSectionHead head where head.secCode IN (" +
"WITH NUR_SECTIONS_SEC_CODE (secCode) " +
"AS (SELECT secCode " +
"FROM NursingSection " +
"WHERE secCode = (SELECT loc.nursingSecCode FROM LocationMast loc WHERE loc.id.locCode = :locCode) " +
"UNION ALL " +
"SELECT C1.secCode " +
"FROM NursingSection C1 " +
"INNER JOIN NUR_SECTIONS_SEC_CODE C2 ON C1.prevSec = C2.secCode)" +
"SELECT * FROM NUR_SECTIONS_SEC_CODE)
This is the SQL query:
select * from IR_TB_NUR_SEC_HEAD head where HEAD.SEC_CODE IN (
WITH NUR_SECTIONS_SEC_CODE (SEC_CODE)
AS (
SELECT SEC_CODE
FROM IR_TB_NUR_SECTIONS
WHERE SEC_CODE = (select LOC.NURSING_SEC_CODE from mst_tb_location_mast loc where LOC.LOC_CODE = 20023)
UNION ALL
SELECT C1.SEC_CODE
FROM IR_TB_NUR_SECTIONS C1
INNER JOIN NUR_SECTIONS_SEC_CODE C2 ON C1.PREV_SEC = C2.SEC_CODE
)
SELECT *
FROM NUR_SECTIONS_SEC_CODE)
When executing it returns the below error:
"org.springframework.dao.InvalidDataAccessResourceUsageException:
could not extract ResultSet; SQL [n/a]; nested exception is
org.hibernate.exception.SQLGrammarException: could not extract
ResultSet"
What can I do about the above exception, please?

Answer 1

The "WITH" clause you are using is known as Common Table Expression (CTE) .I am pretty sure CTE is not supported by JPQL because if it is supported , no one will specially develop a library for supporting CTE query but only for Hibernate.
But you can switch to do use native SQL which should always work provided that your query can really be executed successfully against the database that you are using.