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why select query in hibernate returning null value

executing these hql... and returning null but in client server i can see output in mysql.

Hibernate: alter table Product add constraint FKj4jgrmm2hxt9q00jqrvipjqoa foreign key (buyer_buyerId) references Buyer (buyerId)
Hibernate: alter table Product add constraint FK4d4c781mh5deww0h3ukw66eu6 foreign key (seller_sellerId) references Seller (sellerId)
Hibernate: select product0_.productId as productI1_1_, product0_.buyer_buyerId as buyer_bu7_1_, product0_.currentStockNumbers as currentS2_1_, product0_.price as price3_1_, product0_.productCategory as productC4_1_, product0_.productName as productN5_1_, product0_.remarks as remarks6_1_, product0_.seller_sellerId as seller_s8_1_ from Product product0_ where product0_.productCategory like 'mobile'
Hibernate: select seller0_.sellerId as sellerId1_2_0_, seller0_.sellerName as sellerNa2_2_0_ from Seller seller0_ where seller0_.sellerId=?
Hibernate: select seller0_.sellerId as sellerId1_2_0_, seller0_.sellerName as sellerNa2_2_0_ from Seller seller0_ where seller0_.sellerId=?
Hibernate: select seller0_.sellerId as sellerId1_2_0_, seller0_.sellerName as sellerNa2_2_0_ from Seller seller0_ where seller0_.sellerId=?
Jul 27, 2018 2:27:21 PM org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService
INFO: HHH000397: Using ASTQueryTranslatorFactory
res'= null(here i am printing the value)


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