why do I get Path expected for join when I use join key word in hql

Question

I have the following HQL

String FIND_PRODUCT_CLASS_ID = \"SELECT pc.id FROM ProductClass pc\"+ 
\" JOIN ProductGroup pg ON pc.id = pg.productClassId\" +
\" JOIN         


        

Answer 1

Since Hibernate 5.1 you can join unrelated entities using SQL like syntax joins.

In case you still get the antlr.SemanticException: Path expected for join! error you might have to use the full class name including the package e.g.

String FIND_PRODUCT_CLASS_ID = "SELECT pc.id FROM ProductClass pc"+ 
" JOIN com.mypackage.ProductGroup pg ON pc.id = pg.productClassId" +
" JOIN com.mypackage.Product p ON pg.id = p.id" +
" JOIN com.mypackage.ProductSub ps ON p.id = ps.productId WHERE ps.id =:childProductSubId";

Answer 2

We need to provide path in HQL query. That's the "Path expected for join" the exception is coming.

change query something like below: Please edit as per use

String FIND_PRODUCT_CLASS_ID = "SELECT pc.id FROM ProductClass pc"+ 
" JOIN pc.ProductGroup pg " +
" JOIN pg.Product p " +
" JOIN p.ProductSub ps WHERE ps.id =:childProductSubId";'

Please refer this.