Java.sql.SQLException: Unexpected token: IN in statement

Question

I use Toplink 2.0-b41-beta2 (03/30/2007) and have a problem with the following JPQL query:
“SELECT DISTINCT OBJECT(e) FROM Entry e WHERE e.location IN (SELECT loc From View v JOIN v.viewLocs vl JOIN vl.location loc where v.code = :code)”
“Entry” is a subclass of “TrainElement”, location points to Entity Location. Entity View has a one-to-many relationship to ViewLoc whereas each ViewLoc has a relationship to a Location object.
Toplink creates the following incorrect sql statement – I inserted some CRLF for better readability::
Local Exception Stack:
Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0 (Build b41-beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Unexpected token: IN in statement
[SELECT DISTINCT t0.TELEM_TRAINELEM_ID, t0.TRAINELEMENT_TYPE, t0.TELEM_INDEX, t0.TTELEM_TRAIN_ID, t0.ENTRY_TYPE, t0.ENTRY_ARRIVAL, t0.DISPLAY, t0.ENTRY_ORDERED_STOP, t0.ENTRY_DEPARTURE, t0.ENTRY_ORDER_CODE, t0.ENTRY_PREV_SEC_ID, t0.ENTRY_NEXT_SEC_ID, t0.ENT_LOC_ID FROM TRAINELEMENT t0, LOCATION t1
WHERE (( IN ((SELECT DISTINCT t2.LOC_ID, t2.LOC_GPSY, t2.LOC_GRX, t2.LOC_CODE, t2.LOC_GRY, t2.LOC_GPSX, t2.LOC_LOCAL_RADIO, t2.LOC_NAME, t2.DELETED, t2.LOC_CLASS_ID FROM VIEW t4, VIEWLOC t3, LOCATION t2 WHERE ((t4.VIEW_CODE = ?) AND ((t3.VIEWLOC_VIEW_ID = t4.VIEW_ID) AND (t2.LOC_ID = t3.VIEWLOC_LOCACTION_ID))))) AND (t0.TRAINELEMENT_TYPE = ?)) AND (t1.LOC_ID = t0.ENT_LOC_ID))]
Error Code: -11
Call: SELECT DISTINCT t0.TELEM_TRAINELEM_ID, t0.TRAINELEMENT_TYPE, t0.TELEM_INDEX, t0.TTELEM_TRAIN_ID, t0.ENTRY_TYPE, t0.ENTRY_ARRIVAL, t0.DISPLAY, t0.ENTRY_ORDERED_STOP, t0.ENTRY_DEPARTURE, t0.ENTRY_ORDER_CODE, t0.ENTRY_PREV_SEC_ID, t0.ENTRY_NEXT_SEC_ID, t0.ENT_LOC_ID FROM TRAINELEMENT t0, LOCATION t1 WHERE (( IN ((SELECT DISTINCT t2.LOC_ID, t2.LOC_GPSY, t2.LOC_GRX, t2.LOC_CODE, t2.LOC_GRY, t2.LOC_GPSX, t2.LOC_LOCAL_RADIO, t2.LOC_NAME, t2.DELETED, t2.LOC_CLASS_ID FROM VIEW t4, VIEWLOC t3, LOCATION t2 WHERE ((t4.VIEW_CODE = ?) AND ((t3.VIEWLOC_VIEW_ID = t4.VIEW_ID) AND (t2.LOC_ID = t3.VIEWLOC_LOCACTION_ID))))) AND (t0.TRAINELEMENT_TYPE = ?)) AND (t1.LOC_ID = t0.ENT_LOC_ID))
     bind => [ROMAN W-Pb, ENT]
There sould be a “t0.ENT_LOC_ID” before the IN in the WHERE clause and the implicit join “ID FROM TRAINELEMENT t0, LOCATION t1” seems incorrect to me. At any rate the database (HSQLDB) rejects that incorrect sql statement.
How can I circumvent that problem?
A add the relevant mapping part of the involved classes.
@Entity
@DiscriminatorValue("ENT")
public class Entry extends TrainElement implements IEntry {
     @ManyToOne(cascade = CascadeType.ALL)
     @JoinColumn(name = "ENT_LOC_ID", nullable = true)
     private Location location;
@Entity
@Table(name = "LOCATION")
public class Location implements ILocation {
     // persistent part
     // primary key field
     @Id
     @GeneratedValue
     @Column(name = "LOC_ID")
     private Long id;
     @Column(name = "LOC_CODE", nullable = false)
     private String code;
     @Column(name = "LOC_NAME", nullable = false)
     private String name;
@Entity
@EntityListeners(EntityListener.class)
@Table(name = "VIEW")
public class View implements IView {
     // persistent
     // primary key field
     @Id
     @GeneratedValue
     @Column(name = "VIEW_ID")
     private Long id;
     @OneToMany(mappedBy = "view", cascade = CascadeType.ALL)
     private List<ViewLoc> viewLocs = new ArrayList<ViewLoc>();
@Entity
@Table(name = "VIEWLOC")
@EntityListeners(EntityListener.class)
public class ViewLoc implements IViewLoc {
     // persistent fields
     // primary key field
     @Id
     @GeneratedValue
     @Column(name = "VIEWLOC_ID")
     private Long id;
     @ManyToOne(cascade = CascadeType.ALL)
     @JoinColumn(name = "VIEWLOC_VIEW_ID", nullable = false)
     private View view;
     // direct Linking to the infrastrucutre location
     @ManyToOne(cascade = CascadeType.ALL)
     @JoinColumn(name = "VIEWLOC_LOCACTION_ID")
     private Location location;
….

Answer 1

IN doesn't support objects, only state_field_path_expression that must have a string, numeric, or enum value.
Try using
“SELECT DISTINCT OBJECT(e) FROM Entry e WHERE e.location.id IN (SELECT loc.id From View v JOIN v.viewLocs vl JOIN vl.location loc where v.code = :code)”
Best Regards,
Chris