SubQuery in TopLink

Question

I amn trying to create SubQuery using TopLink.
I am using an expression like this
ReportQuery salarySubQuery= new ReportQuery(Employee.class,new ExpressionBuilder());
salarySubQuery.addMaximum("salary");
salarySubQuery = salarySubQuery.and(expressionBuilder.get("deptNo").equal("10"));
salarySubQuery = salarySubQuery.and(expressionBuilder.get("designation").equal("MANAGER"));
I wanted to add one where clause to this subquery like detpno=10.
The total query will be like
SELECT EMPNAME FROM EMP WHERE NAME LIKE 'SO%' and SALARY = (SELECT MAX(SALARY) FROM EMP WHERE DEPTNO=10 AND DESIGNATION='MANAGER')
I am creating main expression like this
MainExpr = MainExpr.and(expressionBuilder.get("salary").equal(expressionBuilder.subQuery(salaryQuery)));
This leaves off the WHERE clause and it creates the query like
SELECT EMPNAME FROM EMP WHERE NAME LIKE 'SO%' and SALARY = (SELECT MAX(SALARY) FROM EMP )AND DEPTNO=10 AND DESIGNATION='MANAGER'
Pls help me regarding this. Is there any other method available?
Regards
Solomon

Answer 1

Your code should look like the following:
ReportQuery salarySubQuery= new ReportQuery(Employee.class,new ExpressionBuilder());
salarySubQuery.addMaximum("salary");
salarySubQuery.setSelectionCriteria(salarySubQuery.getExpressionBuilder().get("deptNo").equal("10").and(salarySubQuery.getExpressionBuilder().get("designation").equal("MANAGER")));
MainExpr.and(expressionBuilder.get("salary").equal(salarySubQuery);
--Gordon