Hibernate SQL Grammar Exception on Select Statement

Question

I am getting SQL Grammar Exception on simple select statement here is my products class

@Entity
public class products {

    private String Code,Name,Description;
    private double Price;

    @Id
    public String getCode() {
        return Code;
    }
    public void setCode(String code) {
        Code = code;
    }
    public String getName() {
        return Name;
    }
    public void setName(String name) {
        Name = name;
    }
    public String getDescription() {
        return Description;
    }
    public void setDescription(String description) {
        Description = description;
    }
    public double getPrice() {
        return Price;
    }
    public void setPrice(double price) {
        Price = price;
    }
}

Here is my query which i am executing

public products getProductDescription(String Code)
{

    setSessionFactory();
    Session session = factory.getCurrentSession();

    session.beginTransaction();
    String query = "from products p where p.code=:code";
    Query q = session.createQuery(query);
    q.setString("code", Code);
    System.out.println(query);
    products pr  = (products)session.createQuery(query);
    session.close();
    return pr;
}

All The Tables Exist and "from products" query works perfectly but when i insert where clause here it doesn't work

UPDATE1

public products getProductDescription(String Code)
{

    setSessionFactory();
    Session session = factory.getCurrentSession();

    session.beginTransaction();
    String query = "from products p where p.code=:code";
    Query q = session.createQuery(query);
    q.setString("code", Code);
    System.out.println(query);
    products pr  = (products)session.createQuery(q);
    session.close();
    return pr;
}

Error at products pr = (products)session.createQuery(q); saying The function createQuery does not support argument of type Query. Quickfix tells me to change it to string

Answer 1

Note you should change your property names to start with lower case letter like code instead of Code. That's required when you are working with a lot of frameworks.

Once you have renamed your properties, try the following -

String query = "from products p where p.code=" + Code;

---

Also, as @Luiggi suggests in the comment always use parameters instead of concatenating strings. e.g.

String query = "from products p where p.code = :code";

---

Another advice is to make your class name start with upper case letter. e.g. Product instead of products.

Finally, your query would look like -

 String query = "from Product p where p.code = :code";
 Query q = session.createQuery(query);
 q.setString("code", code); 

---

Update

public products getProductDescription(String Code)
{

    setSessionFactory();
    Session session = factory.getCurrentSession();

    session.beginTransaction();
    String query = "from products p where p.code=:code";
    Query q = session.createQuery(query); //query is already created here
    q.setString("code", Code);
    System.out.println(query);

    //delete the line below
    //products pr  = (products)session.createQuery(q);

    //add the lines below
    List<products> l = (List<products>) q.list();
    products pr = null;
    if(!l.isEmpty()) {
        pr = l.get(0);
    }

    session.close();
    return pr;
}