JPA命名查询问题

Question

Getting below database excpetion, help required

service() for servlet catalogservice threw exception: java.lang.IllegalArgumentException: Named query not found: SELECT OMX_PLAN_ID, PLAN_ID,DECODE(plan_id,0,ser_input_total_amount,first_payment) first_paymenmt From (SELECT OMX_PLAN_ID, PLAN_ID,(SELECT DECODE(fraction,0,fixed_payment_amount, (( fraction/100) * :useinput_total_amount)) From TFN.VW_OMX_PAYMENT_PLAN_DETAILS i WHERE o.OMX_PLAN_ID=i.OMX_PLAN_ID AND i.OMX_PLAN_ID=:omxPlanId AND i.PAYMENT_ID=1) first_payment FM TFN.VW_OMX_PAYMENT_PLANS o ) WHERE OMX_PLAN_ID=:omxPlanId ORDER by 1
        at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:704) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Fin

DAO Method

public TermPayment findFirstPaymentByTotalAndPlanId(int planId, double totalAmount) {

    TypedQuery<TermPayment> query = entityManager.createNamedQuery("SELECT OMX_PLAN_ID, PLAN_ID,DECODE(plan_id,0,:user_input_total_amount,first_payment) first_paymenmt From (SELECT OMX_PLAN_ID, PLAN_ID,(SELECT DECODE(fraction,0,fixed_payment_amount, (( fraction/100) * :user_input_total_amount)) From TFN.VW_OMX_PAYMENT_PLAN_DETAILS i WHERE o.OMX_PLAN_ID=i.OMX_PLAN_ID AND i.OMX_PLAN_ID=:omxPlanId AND i.PAYMENT_ID=1) first_payment FROM TFN.VW_OMX_PAYMENT_PLANS o ) WHERE OMX_PLAN_ID=:omxPlanId ORDER by 1", TermPayment.class);
    query.setParameter("omxPlanId", planId);
    query.setParameter("user_input_total_amount", totalAmount);
    return   query.getSingleResult();
}

Return class

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class TermPayment {
    @Id
    @Column(name = "OMX_PLAN_ID")   
    Integer omxPlanId;

    @Column(name = "PLAN_ID")   
    Integer planId;

    @Column(name = "FIRST_PAYMENT")
    Double firstPayment;

    public Integer getOmxPlanId() {
        return omxPlanId;
    }
    public void setOmxPlanId(Integer omxPlanId) {
        this.omxPlanId = omxPlanId;
    }
    public Integer getPlanId() {
        return planId;
    }
    public void setPlanId(Integer planId) {
        this.planId = planId;
    }
    public Double getFirstPayment() {
        return firstPayment;
    }
    public void setFirstPayment(Double firstPayment) {
        this.firstPayment = firstPayment;
    }
}

Answer 1

From the java.persistence.EntityManager javadoc:

/**
 * Create an instance of <code>Query</code> for executing a named query
 * (in the Java Persistence query language or in native SQL).
 * @param name the name of a query defined in metadata
 * @return the new query instance
 * @throws IllegalArgumentException if a query has not been
 *         defined with the given name or if the query string is
 *         found to be invalid
 */
public Query createNamedQuery(String name);

so you should create your named query and only refer to it using createNamedQuery .

Answer 2

If you want to create a query from a string, you can use the createQuery(String query, Class type) method.

You can replace the method used in your DAO:

entityManager.createNamedQuery(...)

For this one:

entityManager.createQuery("select OMX_PLAN_ID, PLAN_ID ...", TermPayment.class)

Alternatively, you can create a NamedQuery adding a NamedQuery annotation in your Entity class or using xml. Afterthat, you could use the NamedQuery passing the NamedQuery name to the createNamedQuery() method.

@NamedQuery(name="MyQuery", query="select OMX_PLAN_ID, PLAN_ID ...")

entityManager.createNamedQuery(MyQuery, TermPayment.class);

Answer 3

You are trying to use NamedQuery api for creating dynamic queries which is wrong. From doc

createNamedQuery method is used to create static queries, or queries that are defined in metadata by using the javax.persistence.NamedQuery annotation. The name element of @NamedQuery specifies the name of the query that will be used with the createNamedQuery method. The query element of @NamedQuery is the query:

@NamedQuery(
    name="findAllCustomersWithName",
    query="SELECT c FROM Customer c WHERE c.name LIKE :custName"
)

Here’s an example of createNamedQuery, which uses the @NamedQuery:

@PersistenceContext
public EntityManager em;
...
customers = em.createNamedQuery("findAllCustomersWithName")
    .setParameter("custName", "Smith")
    .getResultList();

You need to do something like,

entityManager.createQuery( "SELECT c FROM Customer c WHERE c.name LIKE :custName") .setParameter("custName", name)