Hi, I've a query in MySQL which includes CASE.... WHEN... THEN...THEN....END type, which i working fine. select cds.id, case when cds.source_type = 'c' then (select cm.company_name from esi_companymaster cm where cm.company_code = cds.source_id) when cds.source_type = 'd' then (select dm.dealer_name from esi_dealermaster dm where dm.dealer_code = cds.source_id) end as company_dealer_name from esi_cds_issues_dispensary_details cds But when I converted the same into HQL, like the below one: select cds.id, case when cds.sourceType is 'c' then (select cm.companyName from CompanyMaster cm where cm.companyCode = cds.sourceId) when cds.sourceType is 'd' then (select dm.dealerName from DealerMaster dm where dm.dealerCode = cds.sourceId) end as company_dealer_name from IssuestoDispenceryDetails cds I m getting NullPointerException (unexpected AST node: query) exception. Can any one suggest me what am I doing wrong? or is there any work around for this. I need this very urgent. Thanks in advance. Regards, ManiKanta G ********** DISCLAIMER ********** Information contained and transmitted by this E-MAIL is proprietary to Sify Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail & notify us immediately at admin(a)sifycorp.com