java - getting exception when retrieving data from database org.hibernate.hql.ast.QuerySyntaxException: -

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iam new jpa, iam trying create ejb 3.0 + jpa (hibernate) application. when iam persisting data database getting below exception.

sessionbean method:

    @persistencecontext     private entitymanager em;     public void showcustdetails(){         //system.out.println(em.getproperties());         //entitymanager em = emf.createentitymanager();         list customer = em.createquery("select c customer c").getresultlist();         system.out.println("list size:::"+ customer.size());         for(object c:customer){             customer customers = (customer) c;             system.out.println("name ::::" + customers.getname() + "::customer id ::"+customers.getcustomer_id()+"::email::"+customers.getemail_id()+"::address::"+customers.getaddress()+                     ":::ph number::"+customers.getphnumber());         }  }


customer class(entity class)

package retail.model.vo;  import java.io.serializable;  import javax.ejb.transactionattribute; import javax.ejb.transactionmanagement; import javax.persistence.column; import javax.persistence.entity; import javax.persistence.generatedvalue; import javax.persistence.generationtype; import javax.persistence.id; import javax.persistence.table;  import static javax.ejb.transactionmanagementtype.bean; @entity @table(name = "customer") //@transactionattribute(value=required)  public class customer  implements serializable{      /**      *       */     private static final long serialversionuid = 5256938732963606407l;     private int customer_id;     private string name;     private string address;     private string email_id;     private int phnumber;      @id     @generatedvalue(strategy = generationtype.identity)     @column(name = "customer_id")     public int getcustomer_id() {         return customer_id;     }      public void setcustomer_id(int customer_id) {         this.customer_id = customer_id;     }      @column(name = "name")     public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      @column(name = "addres")     public string getaddress() {         return address;     }      public void setaddress(string address) {         this.address = address;     }      @column(name = "email_add")     public string getemail_id() {         return email_id;     }      public void setemail_id(string email_id) {         this.email_id = email_id;     }      @column(name = "ph_number")     public int getphnumber() {         return phnumber;     }      public void setphnumber(int phnumber) {         this.phnumber = phnumber;     }       public string validate(){           if(name!=null && name!=""){           system.out.println("chandan");           return "viewcustomerdetails";           }           else{           return "viewcustomerdetails";           }           } }


persistence.xml

    <persistence-unit name="retailunit" >         <provider>org.hibernate.ejb.hibernatepersistence</provider>         <!-- jndi data source-->         <jta-data-source>java/customer</jta-data-source>         <properties>              <!-- if true, hibernate print (to stdout) sql executes,                  can check ensure it's not doing crazy                  <property name="hibernate.connection.driver_class" value="org.apache.derby.jdbc.clientdriver"/>                  <property name="hibernate.connection.url" value="jdbc:derby://localhost:1527/company;create=true" />               <property name="hibernate.connection.username" value="user" />               <property name="hibernate.connection.password" value="123" /> -->             <property name="hibernate.show_sql" value="true" />             <property name="hibernate.format_sql" value="true" />             <!-- since database servers have different versions of                  sql, hibernate needs choose dialect knows subtleties of                  talking server -->             <property name="hibernate.dialect" value="org.hibernate.dialect.derbydialect" />             <property name="hibernate.archive.autodetection" value="class"/>             <!-- tell hibernate update ddl when starts, useful                  development, dangerous in production -->             <property name="hibernate.hbm2ddl.auto" value="create" />         </properties>     </persistence-unit> </persistence>


exception

caused by: java.lang.illegalargumentexception: org.hibernate.hql.ast.querysyntaxexception: customer not mapped [select c customer c]     @ org.hibernate.ejb.abstractentitymanagerimpl.convert(abstractentitymanagerimpl.java:1376)     @ org.hibernate.ejb.abstractentitymanagerimpl.convert(abstractentitymanagerimpl.java:1317)     @ org.hibernate.ejb.abstractentitymanagerimpl.createquery(abstractentitymanagerimpl.java:280)     @ com.sun.enterprise.container.common.impl.entitymanagerwrapper.createquery(entitymanagerwrapper.java:436)     @ retail.ejb.service.customersessionbeanimpl.showcustdetails(customersessionbeanimpl.java:47)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:601)     @ org.glassfish.ejb.security.application.ejbsecuritymanager.runmethod(ejbsecuritymanager.java:1052)     @ org.glassfish.ejb.security.application.ejbsecuritymanager.invoke(ejbsecuritymanager.java:1124)     @ com.sun.ejb.containers.basecontainer.invokebeanmethod(basecontainer.java:5388)     @ com.sun.ejb.ejbinvocation.invokebeanmethod(ejbinvocation.java:619)     @ com.sun.ejb.containers.interceptors.aroundinvokechainimpl.invokenext(interceptormanager.java:800)     @ com.sun.ejb.ejbinvocation.proceed(ejbinvocation.java:571)     @ com.sun.ejb.containers.interceptors.systeminterceptorproxy.doaround(systeminterceptorproxy.java:162)     @ com.sun.ejb.containers.interceptors.systeminterceptorproxy.aroundinvoke(systeminterceptorproxy.java:144)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:601)     @ com.sun.ejb.containers.interceptors.aroundinvokeinterceptor.intercept(interceptormanager.java:861)     @ com.sun.ejb.containers.interceptors.aroundinvokechainimpl.invokenext(interceptormanager.java:800)     @ com.sun.ejb.containers.interceptors.interceptormanager.intercept(interceptormanager.java:370)     @ com.sun.ejb.containers.basecontainer.__intercept(basecontainer.java:5360)     @ com.sun.ejb.containers.basecontainer.intercept(basecontainer.java:5348)     @ com.sun.ejb.containers.ejbobjectinvocationhandler.invoke(ejbobjectinvocationhandler.java:206)     ... 51 more


please suggest on this.

edit out put

info: name ::::sdsdfsd::customer id ::0::email::sdsdfdsdssfd::address::sdfsdsdsdsdf:::ph number::0 info: hibernate:      insert              customer         (customer_id, addres, email_add, name, ph_number)      values         (default, ?, ?, ?, ?) info: hibernate:   values     identity_val_local()  info: hibernate:      select         customer0_.customer_id customer1_0_,         customer0_.addres addres0_,         customer0_.email_add email3_0_,         customer0_.name name0_,         customer0_.ph_number ph5_0_              customer customer0_ info: list size:::1 info: name ::::sdsdfsd::customer id ::1::email::sdsdfdsdssfd::address::sdfsdsdsdsdf:::ph number::0


enter image description here

the name of entity must spelled defined class name, independent of table mapping, in case customer.

to exact, string corresponds output of myentity.getclass().getsimplename();

edit: jpql != sql

more not not same results (if any) using same jpql query sql editor , vice versa. while sql uses table identifiers, jpql uses entities, corresponding classes.


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